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 0xaa66902d5655d2a01f423e367d5c4aa351c61e79a573ec548e8fc01e723c742b. 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/4b2afcd4-462c-493e-8e85-2c023713818c.json and https://artists.proofprofile.net/proofs/artist/4b2afcd4-462c-493e-8e85-2c023713818c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ming Luhilima and His Amboina Serenaders
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 0xa6aced882376a7271936e8611b3b1704bc3b33cf2e72ba37aa12db09d80b3c99. 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/NLE321700096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62222d2fcf995d33af55d3cc3d24c1c566aed9fb74846137d619807e000d425a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLE321700097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3428a48890eec7ccc05b17a3f7ab4667123c1d17ac63d838b8d0b32bbebebb56. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/NLE321700098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1e70f46df092c0ac91caf9c8dbe2a652d6b46fa847badafee7d899df35ddef. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/NLE321700099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cba747630dbb31256192be2385c4707ea4b63598bf212758653647d311c96fc. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/NLE320900347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fad7bffbc2cb2565cff74f7fc289c59908e3c2131d5f9e95d7bb187a1cd7da5. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/NLE321700100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e8314a7cfe8387f00fa3d278be1231351397578f761f384d87943b17fb9e51. 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/NLE321700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0142d6e3d9ee3aed2c5115aac7a99016cd3016b21f61a4dab8aa22c0882a633e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLE321700103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed272e49b6847919d65a1e07d389703489479fb10eb28ce07bcf602aafc1e29b. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/NLE321700104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1285f9a0c43556fd7b18448969e5902554b9d51b53592bc4c8d6906dd33a0e3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLE320900351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0683d0b9930d1476c95c3eb2c0398d017fac9b4d5a09a6f1ee2056110acb9e01. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/NLE321700105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cda07cdaec1249e4d0539087eb7699344c2b566344aa8ce54913aacafc6cb7. 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/NLE321700106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1947893730b29a83874be0610df81d6cb331ae087e7e47c6974550e0e0ab0c8a. 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/NLE321700107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0476af16325278de3bbe2034183c5f7a9a51b20fdcd32739ffed4be9135f84. 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/NLE321700108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b196d64b5973c6a2f5e62b476505d0f7722aa51c76254aa22ebbc6bf53dbe1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLE321700113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9986e16fe5c4bf23762a8e6227ef44a00536e4ca0a649b9c50f45f55bf906b. 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/NLE320900348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd689ec68042572e0793aaa88aa5c29b12f87b5f890f729871ed3450fdf122a7d. 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/NLE321700115.