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 0xa6cc81e796ca5f36a96ef7807c2e622be8d2a220fb38103169e9d67363c3445e. 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/6b566d12-0207-448e-b97c-6b106de49846.json and https://artists.proofprofile.net/proofs/artist/6b566d12-0207-448e-b97c-6b106de49846.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 0x1b597b5a0b6ae4f025feed2bb58ba3984362f7fc5d172ccbe827f8a10fd1b8e9. 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/TCAEF1942350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e524e4ef91895cb3163172e2f3f03b710d70007a837aa5b844abef31db72ab. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR96X1982177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa422c107207bf10894f2c74f8239998bc242c4fe614d6014f0d255d3d3b4a8ce. 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/FRX202043971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6e33c34711759858235136ed93256f4055569b8c83e0b402e8217949a4f5ce. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/FRX202043975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67960849dfca97a4b47fc295e806ad8120b512132fc391c8faf52ae14058c1a9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FRX202043979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5309ecb88483759e318625bb7bd3a4d023aa4179f8f8391999ecdedc8e3048a8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR10S2209473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda1861416927cc2fc150b86e390fda4b8f83c40beabc0e2f994ef379a3dc475. 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/FRQ852200580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cae89fdeb6f886f7eee5b4f2b7bfe8f93142fa2ad98aafd06c3aa03cc72c337. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRQ852200540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037409bb72e04f0a1f606b9b545865b70eeb90d4e510c5156e7141792ed5b603. 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/FRQ852200510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1a3d084755c885e9cdde5e47d9014d433c400249926428778c8d45e583264f. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:34:56Z), 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/FRQ852200530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cae89fdeb6f886f7eee5b4f2b7bfe8f93142fa2ad98aafd06c3aa03cc72c337. 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/FRQ852200540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda1861416927cc2fc150b86e390fda4b8f83c40beabc0e2f994ef379a3dc475. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRQ852200580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c08b299548053f5cd3b00b687ec64507fea39c3fb39ffe4339397b3de3b0285. 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/DGA082340989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19acaf11b3f3beb6aaf296ceb91df11d06f87995222dab214891bbdcac4bc73. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FRQ852400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8bdf10974cfc1e119c16f21acba12e193f5aad9cd51d6b3387cf1d98a4ec9b. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/FRQ852400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5309ecb88483759e318625bb7bd3a4d023aa4179f8f8391999ecdedc8e3048a8. 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/FR10S2209473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c08b299548053f5cd3b00b687ec64507fea39c3fb39ffe4339397b3de3b0285. 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/DGA082340989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70529532f1c307a00199f469c6975ffe3967691b6693cf9071439ecdcff41c92. 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/FRQ852500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed513134e5e704643ddf047d9b59c533afd4f1f78d12d0e28391bb3eb308c3a. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/FRQ852400260.