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 0x016bea455d24e91dd03d43f47fe6f84e476187cb6ff906b6b0ea165df7136ada. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c41b06a0-65c7-4892-8016-a35a6cbf1877.json and https://artists.proofprofile.net/proofs/artist/c41b06a0-65c7-4892-8016-a35a6cbf1877.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 0xe083847ce00f414b8ad240bc9ceb5bb435607353be212fdb23fc3d1fca41cd9c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZDA72304035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ff818ad768d59d53a1fe12d9880ffb7eb5dc30f31ca6525d84421e8a8744cb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZES82303844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4692ae1be39dddfbc10ca27ba3b86de8ffc29540a51f337609ea0db97c8a5132. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZES82303847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82dcedf7a567992c58fd3bea7999f6a194cc95f55bf322c395170d6abfd2582. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:25:59Z), 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/QZES82303850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c60447b9033bffa7228d44516891d8daf563c49ac027c33ffa5b1bfdb11d208. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZTAW2343182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142df0b659f08fa28fcee8ce4806e9bb010a88e642c3704bed56ef1bf1510f3a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DGA082466175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b15b68680795f06d4368e7ce3fa2324fc2371a2a1d1b5fefdcc9213f3fa6245. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DGA0R2481738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc4bbd821c0689293ff193fe2e2d61225edf05aa91eb8e10dacc8d81f1f3a56. 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/QZWFJ2325829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bbafbf252dc693dd34962730efa5fa86831e065d76fa3a0f54a1c692190738. 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/QZWFJ2325830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535f9367e84ff41c2ad63ed6fa7292098b08b7e7cd91d8ca8a68b72022e87528. 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/QZWFJ2325832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa66966e3333757e91ec743682df725bd32eedf2bf5a0b10d3643e019b4dfd3. 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/QZWFJ2325842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83feb62b5b52de15cf01d0e3139eeaff71892c434f6cefce64a3adbb53c93c60. 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/QZWFJ2325845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ed25a83e098b7ac7af843ad79b5208532540b90ae79c78d2e74f81f6c5dfda. 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/QZWFJ2325846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf933c212a0cd6f5d7cf78772a107801338a96b8d8e983c3322427bd46b2df8ab. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWFJ2325847.