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 0xf34d1fa7f159f84fceb60b053e157c89491704d6da7643c83f669e27fad48bab. 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/5d694774-ebd1-492e-969b-1990cd6c7a11.json and https://artists.proofprofile.net/proofs/artist/5d694774-ebd1-492e-969b-1990cd6c7a11.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 0xe4d5610be7d42fb895e1a59e43c1e91a231d45bf9ef17f5e7b06a4058e2d080d. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/DEP551800260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f099810bf5accbafc8fdbc770e516dde0786a2d19da66ca20836e766f7285a7. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/DEP551800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bc5ed97e83783d7304590b01fd8a9e20205fa88a0eadfed9ba6c99d93289dc. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/DEP551800207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218e20d57b1694d1476ea4c67653af4d1ab1be06cb76a3ed0f476925ade070aa. 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/DEP551800211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5ceed061ecdd70ff6f40824bb2f9cd0092dbabd616e2775377266177c430f2. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DEP551800215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4c31e5901a07b350f950bda776a7795736cbbeeceb473301b5e6762522457b. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/DEP551800220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3360d9a0866d3123e464917400c596be87744700aa077c4b2833457600ebd5a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEZ650504692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53303236d2c1c0508e822500f77078228ede7afd4425afa3ca3d511f68fc38b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZ650504693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ab518aacbb4c8e4648e51d0281fdda444ce873c6d9c49d2b27be8790885bd5. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/DEZ650504801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7335784bb610847790894c113f307dff68e689acf9ce1e1884765ff77b7f8442. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/DEZ650504690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595e75b4381f5eb2bd86e537ddab41fd620a9ef8d56c65554ef45c969a4088a0. 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/DEP551800229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e478f54ccec8437e4de40b3dff8b999c78a9f780f6a02e3ff9ac0d925b196cf. 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/DEP551800237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad27c9d1a4874563221b263ce631d8dea93d10a2d2217c0b7848410b58a8829. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEP551911915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2204fc5152f99239114ec28fce72cb38ba420b9b45350a87e75955a21a929bb4. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/DEA622100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434f3bb93c301299760ea2db6c7b4bcc7735badafae5f067e3edd460a0438cc1. 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/DEA622100616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a6e9c0e18982b4d51a281bf7bf510d5c0a8dd9cf7825d24d0205baa243fb05. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/DEA622100628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d1de55b8d9c0550083ffec4a200ea797a6593a0c696f1b98efec1a58a4457a. 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/DEA622100629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324aba0a97ee11e964649a3119566716ec048ba635f04e23ca11c96eac64faa6. 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/DEA622200858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8a42250b9f2d9105cfb3e909ba2558bfdeb2dfad9f1d14f93f04c3fa0a1482. 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/DEYX82194944.