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 0x9bbeb738813cc344cf14501e6fd6d8e34018ff9f79eb569b86f526d831ab906e. 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/e6c6328c-0f75-402b-aef9-d34e7946c9d9.json and https://artists.proofprofile.net/proofs/artist/e6c6328c-0f75-402b-aef9-d34e7946c9d9.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 0xaf17ea39e6f3baadefae43302afbc2047ba3d247f580d6607349d3e0351bed1c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPKI01816332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda629198161ee872ea1187f4daacec63fadd88cec3b85fa0dc9b2996d2f451a6. 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/JPKI01913365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151ab4afde2801ac701ff6ed0e204133ba4a4cd0d10245754718f159c0c94d8f. 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/JPKI01913374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a87aaba386814d1608d982200cfaf8ee3b7245511d8a3c032ee5f5a5f427701. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/JPKI01911721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df5515ee0488cd9fcc7a64ca4c8fde779e998001a1bec1c18873e3a559f39ae. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPKI01817568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e58d370f36cefd60f896b64ff14864712114b488731fc4ed69e0aeb892d1c95. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPKI01822076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71bc0cb15c6259e9247fc187cdecaca521be620640f8e3a2ff86f29465e7a3d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPKI02012735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2ab14a59778aff51740ffaf1a21b439f7d758e1238b0f8e0b6af5444909a3b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/JPKI02114456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2453a43db00dbc1bfe78b8b6950a05520aa383014b788d78c2ecbe25cf682e0a. 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/JPKI02114460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6c291b5c9bf9b5d6cbb0558df7fdc88aed88cb62a525d0a07aa8f066da5d61. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/JPKI02012736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee3bfec1851a17e53f6dcb2b5c0a76014829671c3a8ccfe6fe336daf8723df2. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T08:13:46Z), 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/JPKI02012734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd797b658d707c04e80ae69cc87a929e265d4cdd56865c283edfda56acff7a6dc. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/JPKI02012733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261f3647c05dc7e2415b39bf04c7692636ef817b315381619b0ddd335e184fa6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPKI02116334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15ba52ecebab98661b8ebb38b40424c2ac315a529760309844f08ad9fd94619. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/TCJPT2224703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bf5b1159b8363d2495a615b71f7fa4faed395ae0b2dc6a910438499b246ed0. 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/TCJPU2393677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb069099422eba4c384b5ddb9f8bec70a6bfaba9fd581ae2180ff456b1c2de1. 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/TCJPX2333785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dad4e54d02d3aa67262bf154c9543a30843685812ee7fc4cfb48f19780c459. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/TCJPE2517282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb54b7edf64c58d24c64376d54dc2885796c332fb60177900b558e6918cf9133. 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/JPP971700032.