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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb47194e4fdb91f8a21d9b320870b7ce83a2d9a1158d0ff8d75e4981b380b181. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99c2f48e-1938-437a-a781-bbb510ce5777.json and https://artists.proofprofile.net/proofs/artist/99c2f48e-1938-437a-a781-bbb510ce5777.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8622cdfa290a8b5fe9ff1f2c55f155e6457091653208ad898b8d714fda4ab01f. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZWFL2334185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca61b36487257b3833c24f8858914efd590f5d8a2741696b9b243ab6637cc2f3. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZNWT2199130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dacdf7764b9b04fb7add725b2ad9fdb5ef1e25ff4e4c0ebfd607618ee8eda3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFYZ2350890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6953c8f8ed2af2b240c6792063948e7e7a1c83374aac72d43c163333ba325e. 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/QZTB62236586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0072db02458683636bfbc419254b5f89a76aef65b90e478aa068025bb7bd988. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFZ32310626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247e72d92bf5ba5f1af408ecc1b105087ee131f1be58e67abfd4a13a0eae898c. 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/QZDA72447887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01098d095a32edda883e001b828d91d62bbef72edec5b6ee235ac6075e82014. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:56:13Z), 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/QZNWT2432560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bacad4964553ffd5d485c580097282363efe647849c97bcc95ce1501dfe20a0. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZAKB2438202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a711af99ebfeac0b8fd5d515f51c292ffcc067047916e9591e210d8ba249f52. 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/QZAKB2438200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea35bfc67089e50413bb05b75bfc20553755c7963c10ab669dd32e37284dcd4. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZAKB2438201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bacad4964553ffd5d485c580097282363efe647849c97bcc95ce1501dfe20a0. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZAKB2438202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f962b7b8a76e540639d450b52268e9461111b83f4a1447c8969c6a7d95ad96. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:55:59Z), 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/QZAKB2438203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a711af99ebfeac0b8fd5d515f51c292ffcc067047916e9591e210d8ba249f52. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZAKB2438200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea35bfc67089e50413bb05b75bfc20553755c7963c10ab669dd32e37284dcd4. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:11:20Z), 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/QZAKB2438201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209de08471f24f8df4f3057c51aafd8798853b95cf0e9444f389a3345b037119. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZAKB2441363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36f9e6f9c76423aaf204a49f87d63f9091e2f628403f49e7cd1cb656882222a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWDD2448415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19082e49a003cde4a68c50edb6840bc979f1eec6f6e614324dec4a9b73163ef4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZRP52107848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19082e49a003cde4a68c50edb6840bc979f1eec6f6e614324dec4a9b73163ef4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZRP52107848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44671aa2a2aae41cdd69d22f55607caf7418eb419ef8f231b3f7472314546f48. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHZ32193302.
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