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 0xe61d650df18755d1aa797e5717a02b1583ca52bce3b70d351d7b72f7a8ba9770. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5638e4bb-23e1-4480-b7bd-0820f717288d.json and https://artists.proofprofile.net/proofs/artist/5638e4bb-23e1-4480-b7bd-0820f717288d.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 0x2cb3830f348a89d17592a77fc64b2077417b61f43feaf16482bdc32f45653677. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBSMU7254124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca8eb9cf972b097bbcd02ec8e33777ff1a05e22780d02b33412c452fb8ac540. 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/GBSMU7254125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b08156526bd05d52c0f0db4c2ca6b7f1cf22ab10671878543f40bf51bd67030. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBSMU7254126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dd5deb7635ca7c8c09c90e4c3254a05204119ade61c399e6e87e88abf6c3d8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBSMU7254127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6a4a23afbe96893c46f50c3db0e47ac9d648dacde6887ca46f0c88fc30a4fc. 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/GBSMU7254128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03153468a9e306dfe86f0a41d409efd43b9545887bbadf5c4c3c17706409cb01. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/GBSMU7254123.
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 0xcccd4f32ab0692f5867dce7dff3760096dc4a783039c7c154b75ae3a3d052010. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBSMU7254130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f967ae30b29533fbc6387416f7999a3c8c695f0836e1021367787b040cf8e3. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GBSMU7254132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbb5bd178ae97cea89ae3a6886ed05a60c98450a12c660457a2699056dcb5a8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GX5MY2262119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c428c6a3964225229375cea070f1a12521bb33de5edf142b6e447e48c7a36ab. 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/GX5MY2262150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791575282bb76feed6add538902574412a67184f151774c257cdae584afe56c7. 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/GBSMU4571908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ac29a776f4db8ebc81e25f7925a30ad2d459fc69af3c98e7c9e090e504a9c6. 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/GBSMU4571909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cc626819efbc093dc105e4fa9a9189709072651b8050b055fce532d19a76bc. 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/GBSMU4571910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5af5cbf2b108d3167f9ad92325f8e4f87e47a2218c5be6cfb88d4aab95f973. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBSMU4571911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c4028f03bb892cf0c14663401964913ce90ac654518092f053b52be21de564. 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/GBSMU4571912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8baa4ce9d9f8a31cac235f1eb9941563b2bf843e71d309129542e75c23b9efa. 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/GBSMU7722720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfee1a156df49e59f0d7489b5da26d0df80b9d414a8c33285b96b90544289ca4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBSMU7722717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70802906dc4c07775d62337a9d58c3147f1936e6e165dda71bbaaecde736d4b5. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBSMU7722718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b4bfa9ca7dac269df5d92a70d9fa034b4ee40943ff80f53886def8832e0c1b. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/GBSMU7823062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd587ad8325ee5791f84b99af7ae62f2196cd49f481235fc89cd1e7cd6c64976. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBSMU7722721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e8b0ceed1e7604d810725d6b8e1dc88031c9afacd630b8392f989c80621984. 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/QZNWV2385251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264e28c997e59db37a29355428d1d6842ac11f63cb841669afc0e75011b29b71. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZK6P2310611.