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 0x8d63233ce3aa1eb6e1a8cf28d87fdfb1e1720770281fce6f59f2c1f4fabd08e6. 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/ae5a1f5f-46ff-44e5-a0eb-3a8be9866ff2.json and https://artists.proofprofile.net/proofs/artist/ae5a1f5f-46ff-44e5-a0eb-3a8be9866ff2.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 0x65475a50e74518c2594242c824d4d5e617308a91a386e25006af86b0806919d4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEZB52010531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d12a91dee540f980a459ed3b8f522cdfb38fbd3f1a133bd06bd2fb623f9eba2. 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/DEZB52010532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15feaddb6dc3c3e17d47138945a13ea137b49a2b1217698c67b42de4935536e2. 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/DEZB52010533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd0977907d21152bfffceca55f785e71050144d3bfeea464ea57d8b0cdfe91c. 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/DEZB52010534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b32a776f5a9162b2ccb00757643dbb973cd0da521f80ac998aa7056bd7a976. 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/DEZB52010535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e6ef3f5367a266649a5b247150716cc8cad7052e98b367be469ff51131848e. 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/DEZB52010536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba9b8a91544363882eeda397186f5fea72e77b30f69d2fe215310d14ac4aa5d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEZB52010537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29578f48a1e5d54723019a47c7edbe700a9d3ae25a52357b5a9b2e10c32cfd10. 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/DEZB52010538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f064fe4c9940482d8284891db1791675f75f067a8fa9742bec49d6d35c9db1b. 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/DEZB52010539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2be4d9326305278b6f18be2847f42547e6db9c960030726d3ba6db76333d539. 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/DEZB52010540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccc1c4777c2d7d31b7835914f2f2092ff69b187117f295746a085d63ffd9ce8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEZB52010291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb0d9b3b8e4a736cf605488f97349f0c0cb0a677186aace1a3a64b8d42e004b. 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/DEZB52010292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbfc56fadb31b4a399e810257a9b4debd24df6cf417365f7258b60c34757ac4. 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/DEZB52010293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465ee8e11f198876b47d2dd0d75443d3f57fa8256c3f3e9993abf46eaf2f37bb. 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/DEZB52010294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58075298cfbb7c48bf611e5a8ed82bd13b53031931d3993adaa3eb72793f260c. 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/DEZB52010295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8515955dbb07541c982cfb8b34b414bd8a0eb11ffebe4749fdb7e2d3d0d08f20. 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/DEZB52010296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551a658d6f4232f8536ceb7a21190e310947df577d62a9646ac06433176cd9cd. 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/DEZB52010297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12431aa358a16e710831b3de8fc89308e4c23f71fbda415eda162cecb927172. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/DEZB52010298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe5e16b1bf21f057a7dcb69489c3a001d41cca7d213aa3378bbc261e5c02d96. 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/DEZB52010299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f69d363542af538bd84d3266db7abbe973fe7e48f4ce1e9f93d7902fd50ba2. 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/DEZB52010300.