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 0x663b85f2780d2e09738041ec7275024fdfac4a476c8d49961a453fb86f43b930. 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/fa1eb6c2-23ed-4119-8d48-801324d8bbcd.json and https://artists.proofprofile.net/proofs/artist/fa1eb6c2-23ed-4119-8d48-801324d8bbcd.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 0x5de6be16195f8c0d59276202ad5723efc155845d5f5d7c618ed6fe46032d7ae9. 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/ES8242442504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c266bf5007a9779c5e26dddb01bc02803e3ccdedf50db19175487f0a87fd61b. 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/ES8242442505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e26159bf86f51dfeb21005e18a8f365ab4c6edcd143dd790e4ddfb1e55f1eb8. 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/ES8242442506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907cdae8af9c4e5f37b249005b37f2fb7f969161c6c646c10f871a1472aefb68. 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/ES8242442501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a47cc6bbd3de6acc198b3b5d0b2ef2430dd2e3bdf79f313a08a3ba71adb74f. 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/ES8242442507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e1cb8dc6ec514234ac4abb6a1356905dcaac16edcc0e20e9629df61c46acb1. 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/ES8242442508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c62df5896fdbcb8414b6a2d568f4853b14ab37f9b8bd1cbfad990309d0aaa04. 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/ES8242442509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d312541f78f23c3369d4ba2c45f1e0e93ae8f232e3c76ee61f0c45f02ab902e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES8242442503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e687ef88447f2c05a774661864e7d44e1e8c21b3ed8a185c43efd88f2ac0b95. 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/ES8242442510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8814d3cb41cbf57565fdc4431147a568b5b13e0009a66e7790979f0881d93137. 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/ES8242442511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ad849d1eaa506642f3b7e36c8cd72fcb1e47d925673070b42ae27cceeea428. 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/ES8242442502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d710b67a6bbc4968de5a61830395652e43038dede1539c50fa5b278c1461b48. 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/ES8242442512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d312541f78f23c3369d4ba2c45f1e0e93ae8f232e3c76ee61f0c45f02ab902e. 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/ES8242442503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ad849d1eaa506642f3b7e36c8cd72fcb1e47d925673070b42ae27cceeea428. 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/ES8242442502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907cdae8af9c4e5f37b249005b37f2fb7f969161c6c646c10f871a1472aefb68. 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/ES8242442501.