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 0x4d3605696795af130c640b25d2a5927c81e450266b152654dddba7f25b1ef4eb. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d87f83d-e4d2-4810-a659-e1fa971e9f14.json and https://artists.proofprofile.net/proofs/artist/5d87f83d-e4d2-4810-a659-e1fa971e9f14.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 0x63f79881701ea3361a7481d541e6b1f0b5ffc3409f3b7f45bc1f4088722b4508. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBPS81500695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e2f5a239386c2009d07ec47ca25beb9bc68168aba63e45b63b4a9690b642fb. 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/GBPS81500661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc252244f3a568489bf40e3ad63811b92fc3ddb8065963e981319cbc1484d0a38. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBPS81500629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffa3947b457874a1f122abc1a2cf909ecc50d6671d8eb8747c865935bc3513c. 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/GBPS81500635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d1ec22bdc8a1f68b0de2dff5e1279511511e0e560ec85f73b73cb99374d091. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBPS81500637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f85505b85c431f54993ce1f2541e8191518d4b5864394bbdb8d0fd22813250d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBPS81500634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda79a1006a4eb5f8f7387a30729c7996fa7a7c6e6795e11d193476c0c78ea894. 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/GBPS81513106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b1c3ea2d1a184d8dc4c6722ac4fab37d37505d36364ba04af993e337c118e9. 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/GBPS81513068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc02eea1250a6227375105695a373282ead495f3f8ef53b48bf0e092b705031f. 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/GBPS81500669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d1ec22bdc8a1f68b0de2dff5e1279511511e0e560ec85f73b73cb99374d091. 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/GBPS81500637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534611ccadf6705dfc35dda0462a1a0cd6e64a59a35b3fe6b607ec4429aacf91. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBPS81513088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f614b87cf5468242e9871894b1342f6eef46ba72c34e3ddbdd35d315b808cd8. 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/GBPS81513084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda668b3fc3a6a3f9df18af7d59315c51d6122eca76a547f52106bbb1250b7b1. 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/GBPS81513109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780502a73989426de53a0140790ce0ea324c2a858735898e40d790b5e3f897f3. 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/GBPS81513067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c599dad68fd18673bfc5e50697af751735e17adeb89cd342c1c65094870040. 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/GBPS81500630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec459680f40b34822b7316feda719036ebedbfcb6ee441e619daaf5d949e24bd. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBPS81500646.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebacd7906890680bfe5478d0884605203a4ebfd918ad2a3bb4485470c7c5d59e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM91006773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe284ae21624daf7471aa5a56f7a9b575b5c9aaf372d45b44d1e16fa19b34667f. 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/USHM91006774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd430f8372a411406eb2f7360d476db4dd4d3fbf5d1efe2db54cd71847a9748b3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM91006776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b46863f65c2b2f8d90474e4c799544b224a6dbba91a64671c213f45f497b1c4. 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/USHM91006782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203db47e0500ed9d0a8c2e2f7025eb974a4c78e3d4757f0afe1119c4e6dae7bf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM91006783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a70259b781a6202d690cd5ea16aefa622044a84553d5eda60dc06fb8d0f5985. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM91006784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3e1bea83d8c9159f009523727a21e06e542739a596e6209476af02bc24d793. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USHM91006772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7462ae5c9b80f17fe2662fa02b1bc14d3557fd8063e384a643917f8f0ffb1aea. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/USHM91006775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3890cb1fd01d1bf614de96910ce73cd1a096ebf402a1894cb62e80b03b767073. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USHM91006777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ad8ef6247d160c7011c8d79d905389ccfe82a3a90592a529f6c87907ef448b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USHM91006778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba58a41a30bf57eccf496e37fc11c199e92c6e22d3031e46aba8611ac11f8ea. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USHM91006779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb67adc19d3c1eb27e66c943355e20155feb47322725af97a0d9afdf08525ea2. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USHM91006780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d5d4643d6e64aa5a751ce63502e277a5e402a34e5dc75bc22b81fd4f4360f4. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USHM91006781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c927dcdb2f37132ee5e61a0529d1c11ee95977f3a3bbce80d52fd552aabcf6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCGH0547763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42179251588d3d0e68c1325f10231e3ffab5fa6e003affe8a5ce1b8beebae296. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGH0547766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb39aee9daa1c314b7ee81a7ff537bdeae4adfab560de72526042404cb8ff6b7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGH0547767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2c714faee9c2a98b69084ba33c08d9fb6ec027270e1736c2bf109ac4785a94. Chain 2 (Bitcoin): anchored in block 957287 (2026-07-09T09:48:29Z), 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/USCGH0547768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e876d8ed603e6123ef302423e188521ef6930a1d6fa554e8d65be2f831c48e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGH0547770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb80845117248205a3ea58ec1e6bc8adfe877f28fc5413d01dbaae739e4cf3f8. 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/USCGH0547771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43999f6387607e2fbe72c76aac82f32854e2ac4adf5d8e2488dd54f8b6703537. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USCGH0547762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762a358a9284537e059c4d779513ffda30fe4b978f2e205cc3f1867d16c01e5e. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USCGH0547764.
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