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 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 0x7fc7460433322a637311d19a57d05d29f32b8d44921c2fb797388db843501459. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3138df1d-e67d-40d3-a28c-45ff9b2bb163.json and https://artists.proofprofile.net/proofs/artist/3138df1d-e67d-40d3-a28c-45ff9b2bb163.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 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 0x03e246efb6ad8d0b0586f2a564914124a29eebe72692ca39448285479ace1bfe. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/SEBGA2001164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b78e5c00b12c18c304ed999d243d2b28b2562b33cd481cff9adce6482b1a24. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SEBGA2001165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21858a6b8838988c26aa859eba4348cff891b80d677d625e1339eb5e30a1b1af. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/SEBGA2001166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6e83202b8b16d7096ffdbef7b4dcb48d7af3a01c0a4d20d74912d43c285326. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/SEBGA2001167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad89824068374bae52b591c42d4e9127becbef442fb003bfbee67e253314436. 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/SEBGA2001168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f5d3263dc9cce81206020eaa5c670eba85e868e9909b0faf6138e17ddc4ed0. 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/SEBGA2001169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccf5af74a294bc88efe3288361a035fd2793b429ec38cceaf9067a9b884e019. 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/SEBGA2001170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb966a2453bca13888ff8aaee366c6408b3cbbd033b7731372a5c841cf7ee27f1. 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/SEBGA2001171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d261f3f1faf1a77241221b979cc258cebb9f4322402e54abacff79ad234dc6. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/SEBGA2001172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb38f973e25560a86ac29f7a6ce8bd3992c2dfc57d006cfd6d0c8be41ec879a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/SEBGA2001173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc09cef8c0e097f4b1bd3908ab341688bf8451a4afe49116be3131e1d6025ced. 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/SEBGA2001174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f43364b68d753e4e3bb02fa866c8da5885521d278d19ac201813e26959ed86. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/SEBGA2001175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a11c00611abcd2ebaf030f08d93f5cbc4e963db8f0bdd6a44a173cf3ce6efb9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SEBGA2001176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc9ef140dd435de65aefe735b45eb0103af43f9d0bfc4ec8d112a3b03e6d32b. 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/SEBGA2001177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f1aac9147c933f62ee56d741f9a6b2cc3a1407dfa5dad5854b84807c2adbd4. 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/SEBGA2001178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea3d1b28f4f30aeb4578bd81b0f081457f2ef73b709bda478d5f85f9b300741. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SEBGA2001179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c55a0eaa8d71370359706d79a57d460ba546ada7bcacedc2472a6dd7a25206. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/SEBGA2001180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902b2252f4468b35a9da3ec8b7cb7e3f568fe95548d599989ed8d702ba332ecc. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/SEBGA2001181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae3aa2132577bfa61914d940953fff026d57b71a91353ff4b962df6494348e0. 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/SEBGA2001182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebe277de127458ef08f55a6b1483b013967351b1c6d72cd5b2ada671d4d7d80. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SEBGA2001183.