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 0xaa4563f509cab7f99919db567ba284715caaafd42313fa09e959925da14ee02f. 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/5ad928fd-157e-43c4-bf30-573dd4653478.json and https://artists.proofprofile.net/proofs/artist/5ad928fd-157e-43c4-bf30-573dd4653478.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Je suis un No Man's Land (Bande originale du film et variations)
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 0xa1459c430e304a50424cd5be57a5cd1d2539a9c414e356af3d87128da2b4e036. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:24:53Z), 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/FR9W11813209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384955c6b9a0bf0edd629093786a427a99f1f76a9c0755fad4008723e106d8e0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:52:19Z), 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/FR9W11813210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8747b05b1aa366db09d47ab0447a92735edccfff687f0a4544822bf30fd9e6a6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR9W11813214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a674459f899585e28e4a85cb2956a3fbaa714cc1c8ca2771bf45b247bfd9a99. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR9W11813217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a130bd5a48075a2a3ab6674680aa5e18e41eb96fdd4da09bdead0b1d2a56e5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR9W11813219.
Murmuring Hearts (Original Film Music and Variations)