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 0x0a4254a70d5a12093b2e38285f4be77ae660a1838467cd47fab555ab9496ab40. 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/1a664062-e94d-4860-9e0e-6e175d99f0d4.json and https://artists.proofprofile.net/proofs/artist/1a664062-e94d-4860-9e0e-6e175d99f0d4.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 0x96030dd55eb63f89f267ce2b72316665c205d61343d033fc9b7b77b14dc67f55. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:02:19Z), 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/USHM21570418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7581dd0ac06615e3bbf968d99aafa4533336f8da64e5f3b205d2c8141c0dab. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCACM1697529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575e21f45d1c1ec166cfdb1aa4aac71c88a1756169de8d018b5866876c361379. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:28:53Z), 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/QZDA71859265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fffa1d46121192fbae8e1c0134db3869e70c93391065b4ab62cd2699257a6c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA71859272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222331ce05e2e12b3dced0273be38a53f5a2a5769167993350466da6142827e8. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:34:21Z), 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/QM24S1923833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c886ba887b15aeb005f244d56ffb8ba2669b906e5463f94d6406865cd1d8743. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM24S2002622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546ba72914c4c8336ba84e29ace72dd3f84b7df4a14c374460cb6e74e40133df. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QM24S2102198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2971fa90e5f787d0107b14459e6ab871d566fc71387ec9d8055309fd4823a62. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZHN52320004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe90a0450f77ce93b45ed69694262c96439b481e43658600a51377501a6d5929. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAT2373300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac93e7ecb1e5700e7a2e3707344f9766d24df355e6fd6d4267b4b4920fef19b3. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZTB72310399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c72afc9dd43dbc83ea74ef392c21360021633108af24802bbfeee86ac2f45d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USANG2426561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24ae523bdcc3ee80bebba7f201024b4c287bb39d2889c3eb861dff807eaa9df. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:53:20Z), 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/USANG2451429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bd751c5fbf916b2ec6f32b78f0b3dedfd8295b1983251d7e109e112680a3d8. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/US23A1590082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eaef5400995aeebe3fd285beb7605d5feb2a3a77604737f89ccf001a106c11d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US23A1590081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c61286c65625b8790f09d5dc8c91d0f3dce75898183f7bb16464380e122653. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US23A1590083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8030306a205c5619090c8fff467187f4ff6ebaaecb6d82b19b5d87d3423d8187. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6K2531005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcf8b1348ff23dc0fba9e3d63a67faec6090ee672c1ab2cbf17e3bc370e5ac8. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZES92584042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c886ba887b15aeb005f244d56ffb8ba2669b906e5463f94d6406865cd1d8743. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM24S2002622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3247442b24ea8bab55d4a7b1b1c335682ba70f1d12834f9a6d0d2a582c021a1f. 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/US3DF2478610.