Andrew John Skeet (born 1969 in Croydon) is an English musician, composer and music producer. He has written scores for television and film and worked with many well-known composers and artists as an
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe963c15654826ab83351be9f381b6da1eb1880172b96091a509d2a9515a0625b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00e708e1-0534-456e-9ea0-7f326b7c4821.json and https://artists.proofprofile.net/proofs/artist/00e708e1-0534-456e-9ea0-7f326b7c4821.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dff254eff7fe772c2941755453dd741ae0342b8f2db2b914647956f647189a9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018218.
The Legend of Zelda, The Wind Waker: Dragon Roost Island
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cafd7832c32b40d451aaa951559217bab01d7eed487985bba6884946d417dce. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6020618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740a6410ecab334c83be1b7f035443c859ac6eff05b625868ade2010abb1b1f1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347fcd7c6fa7586362ab6e66328e5f2816ea8fe383eb37653c814bf90bce6c6d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e57abae61e0a784076caa462df571cceff08757e514eef0c96551ebd9ddce0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6020624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1b99fba821accf5d6daa8b597cbea0b8658ffb531946dfa6ae797e383b8576. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018224.
Assassin's Creed - Revelations: Main Theme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecb119c2b0571507b23bc6d84e4a7cb16e466d0f5c31e2845c31385509cdb2b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6020615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319254443f20eb9e46b9065b93eedf2ae712e869620868868f9a4d237063b6ff. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55e07ffcfa69259145e65361d15bd78c3452f191d3afdb4e092fe8cd5f9ba31. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b5a75591f0ad79a925c88b2ef5c0243b5925546088de0e4d17128f719af782. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916a787cfdc7b37fe411b2c12edb6d3909f321ada9fe23452a056234a08a4acf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6020619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecca9c7a49e81d882669d169960102edce9566d7f19a91b78c8e4ea8c5efe700. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccd107063d63f278bb3bcf6102e8c2c70e78869254e902654cbb356c028737e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dd62eebe64ef23bd7669aba3fffad42e5959ea45bf6b3b5c3528d93ce95920. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018227.
Dead Space: Welcome Aboard the U.S.G. Ishimura (Bonus Track)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0008f915f9c467e48d1e0219129066360e193e4ce824d9992134d7e7cface3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668df52fefd7b8dc39c0ac742d685657f1e13c02641592921764c5d1089b31e7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a025cdebbbc86b27c576c529b36eb0efc96acb18783126b4aacadc1410ec88. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6020630.
Kingdom Hearts Birth By Sleep: Fate of the Unknown
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa33e29ebef353ba07d25e716cbf168defb6542ad346a32b7806b9b1c9d702e. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6020627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1b7ddb3f4b124aa464029bca77f340232d4648590be8e5ea5545fcbd5f2225. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018209.
Mass Effect 3: A Future for the Krogan / An End Once and for All
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9ae06a0f1081694cdc5c871c714014f86de958db0d3f9892d6811fee8d7cdf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6020620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc8337f419e30ee57ce1a209f725557c98207f32e510859033a9644ce056c29. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6020629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fd8932af57be523c2a10657047a574ab089790569f5138d253ec6c6d6cce7b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506fcc37038ae96386bb5fa9ac8a43c7e051f56d23173e94ee1beacd6d3192e1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf2efe88b91e1380d725b402543acd7f9acc894bf382de9b6e488a18d715f40. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6020623.
Uncharted, Drake's Fortune: Nate's Theme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e26a576da5e455a376594951058a16fa299df0ad97aee139510ee86237c179e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018217.
Call of Duty, Modern Warfare 2: I. Opening Titles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb698d64214d8e40c3347defbd9dddbb5c1f6ede0d6d6f6482061721354f43b1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018208.
Call of Duty 4, Modern Warfare: Main Menu Theme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d53b51439709606ad60e914ee2b4f84e494d6474c3d64819230e47a7aefb3c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e22163de6829fbb0964921540f0d52534e3cc74009f856445d86da6c462d1b8. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6020622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537a407d22115a50ba43a6b0f125ab99e114a045ad86d167e6cfe3eefc11f85b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749dab54ec88dd3266c182be186474f29ae5f8ca027f3a10096f836dc01b0445. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6020628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f8d6e5bd211bfca8e233f912cbd7b7e0413582dc8892e2266b0a83dead64e7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5080e44f531bebefeeee6e289be53ee7c5c5d33cc02fd94702fce9d5959780. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6020621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f05f4ea66dbbfda79d0bb17cecdf9e4859ede8419663e86a09ec91c526a8d6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450256508d92da6ed7554b0b1d00c0305eec5c7b5b5944ca79f194c37ecf8b1f. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018216.
Little Big Planet: Orb of Dreamers (The Cosmic Imagisphere)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45a0e83fb9c40eefcd6baa9dc5514332856bef1d87b6d3b43835d0944ee1ec1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6020634.
Deus Ex, Human Revolution: Icarus Main Theme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f6e83c34441c3fd9e2869db4d40a2b1d6f9fbad0643890ffb4702f384e6447. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6020631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a5fcbc0dc742ab898448a02ec61c575d00338d4ab9ddc49f4b277df38835e8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6020632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816776b6ca6f7ae2fedd88823e552492ccdc0c48362249b0a3dc04ea2162eea6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6020633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d406185a64486d1f87d10e5fbd9dc6278e1d61656261adc922cc2b295a1d12. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018206.
The Elder Scrolls V, Skyrim: Far Horizons
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b548f0e1507a5375ad2d9c319594a2b4c408f4bc0e9faa8b62eb774db95773. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6020616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc9fa88b224f874e450e802f4f76d9cc28dbc0119ac084ed7669d649c83e79a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018226.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch