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 0x4cc7ae243142a5247fd8bc8ef371c340ff79cea3f184d73e06fa20dd7004fa90. 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/8ef820b9-643c-4572-bf38-a961dcc74f47.json and https://artists.proofprofile.net/proofs/artist/8ef820b9-643c-4572-bf38-a961dcc74f47.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 0x2a6ae8c3c6c669623a611e323422053765392d5b1130629ed44d6ab061660999. 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/GBLPF6683429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568e5c6d0adf0bfdc4ac6a5bcca169864dd53ba65d12038948a0e23f53e86b0d. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/GBLPF6683432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6c80124919036e6acbe1191257525164e501b14e7050538b65320c4f38d2c3. 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/GBLPF6683455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dd2518b3668e857cea50fb3dbe126882c3aab34d751f9f1421f3c56b5f0263. 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/GBLPF6683457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92a29d29b0e8a784a16f36d3299bcfeb819420ae1bb41f9bcaa7f0b067b8d3a. 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/GBLPF6682909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d29c240a8803844316b876f06aa9a62cffa60511c41863c104617ebe6322cdc. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBLPF6693921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5c73f69e38b9cb470542018b133376af65a516528a21e16fb26dc298cdf079. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBLPF6711787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b38196d52c12734d7659250b2b4df2e0db92572b1176e927396d3190efd9c8c. 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/GBLPF6718232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2241d7946829a93d1062d0b9e6c70840a83ca933334f8ce75f2df06c30ed38e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GBLPF6733610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4d2040cd2751aa836b40520960cbed91d8f545e60e6255bd8c6308b8418174. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBLPF6736067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f779d8b62027580d3c64ecaec55066b52e00949790675b2b613d1b6b76c4bce. 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/GBLPF6773380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee6b95d90d72a8cd472683582382316200e6d2e96f24a9ac215e6dd04c2e7fd. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GBLPF6774198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f9429f88e04f4c0f4b92b9ec6677df51c864a3012fe18f8cc1a0316e21627c. 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/GBLPF6784833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873ed7942615de45bf3a91b99a1573c75a4e15b3a6f16e9ee2ee166428154729. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/GBLPF6794409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423bb741908d09197a7cc1cfc6cc3b6e3a55ff83781343b6ca1405c103523017. 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/GBLPF6809745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd957d73212d0458ccb0221e4d28cd35d1e17946da0d925feeac062f7ddc458f2. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GBLPF2504388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67598de8115714c2a37141f10732a0390e2273dba74984730b6b8a18e20b387. 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/GBLPF2513424.