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 0x07854c903c28cb0a0e579e1fda4d442ff30a9c787fe4bc373898db4bfe825411. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2eba2e9-219b-477f-8d24-5f0debcf30db.json and https://artists.proofprofile.net/proofs/artist/e2eba2e9-219b-477f-8d24-5f0debcf30db.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 0xe45ca9529146e118948c96cb9691a38bc0d8b144646f8f3ca75f690e7e8685b6. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USHM22281624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf982e72775755abd26c2fc1be5af93aa15e5d303c8f0c8693c565c3f3383c6. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USHM22281625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5b50c6214c01a901310caa92c54abdc120a45b8e92d8c0b111fec8404f925d. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/USHM22281626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e9a16f550280497e34f9b0d72331fcdc995d879138294ac7257a1d7b4cb03a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USHM22281627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdceee90737325b6224458d0e7b436ff15e1ee4d0d10d2f537f3b2c052efbfdfe. 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/USHM22281628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be4a34861ef44826c5c2061fb833da6f3e2b28fe191863081ba6380f568a805. 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/USHM22281629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bff5b39b22a5c503210958c5aa4c24d692c6bc8c6939a4cf62fa880519492d. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/USHM22281630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ef2cf52e18bba635faf16864e296b7680ebe127e20f3b08967ffba340c0996. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USHM22281632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c97fcd95f85c6fabb067a6678a825c55c0a3706a1c5fd65a49e3505285b009a. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USHM22281633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c157bccc1d5550bbe64e8931c928069b4f5f8ec8d49e5e3fed43253461ebc4. 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/USHM22281634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ef5c90ddb01fa937c7eb159434fcd68550e56161d6063da26db86f05d86ed3. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USHM22281635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d064ce91868c5725d13e7537425b18c0f903d6d80c9cdc1ce459bf08d9886f2. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USHM22281636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c19de54c61bb580bbf1335f2fb87a272a19347994edf2cee458064f7839c26. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/USHM22281637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539c90138ce98f5f5358b23d3b855373bb08b6ba8890600e7edaa06628c76c25. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/USHM22281638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f4d3c0fcb991ed0866afd2c70e1d89599e7677e1ffc04c34e3f47f38dda089. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USHM22281642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380faf0fd69ef367f66b7085a1d611d254ac2143161f573eebf8f575f47e71e6. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USHM22281644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6315bdda4551720c672a15b9b83c14744c2bfc7f1348b3d8c4a07d219b6c6b29. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USHM22281648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032d439df5ae10d569a4c85ce25f18847ef5787e5862f65c2bbed53bf20c36c3. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USHM22281650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25381518647d2455d4cc1aab17fad320cec813bb6772cdceb8dc43bc5c13b1b. 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/USHM22281652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebaaa39b8ec51767d21fc8e7071f4327ee77c4ac34783fe9e63fa5301ea75d58. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USHM22281656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e5d300724a4f3435dc743d8fcf14faef9471d58fbc2eb7b85e055eac96a0cc. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USHM22281660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d0e0d477b80353c0016d76a5be120382a7f7713f814b21104ffd8c4fb21951. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/USHM22281662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f531014fce700d5ba8c6ae1a2660f29c6c828a54bde325f922d6db1a43e97e6. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USHM22281664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a0d3cf80fe1434d94b24507eb2bca8675bb3f1147d7bf7d83ea63cdb4a4a9b. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USHM22281666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0681770480eb54469846ba805105f2eb4f2005e1a9a7e296431307da895f30. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USHM22281668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae55e58a8804d076e444a9c1f8989cb30a09690550936231aa3f51d87f1a9cfa. 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/USHM22281670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4db38d26eb0c995d9b6ff21410b0439c6d45b312ded567116232928ddc0b1db. 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/USHM22281672.