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 0x75dd05e79769dd88730d7831a4990c64c57c9bb6caf0906f399107c302e7f7a5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5fe9a312-101f-4fd4-bc73-085aab4ff42f.json and https://artists.proofprofile.net/proofs/artist/5fe9a312-101f-4fd4-bc73-085aab4ff42f.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 0x93ad0c21d7d5fbcb608fbf18984a9d98df254c9d36248eedf6eba46cbbe90470. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZTAW2333497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42f3e892bd755e3febe5c166cf9529bcc92c26de4553f5343e025c4bc53b7c2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:04:10Z), 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/QZRP42489869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb23d6bcef641ec5071271acbe5242deedfaa904d089b2f01cc4d7ee251c7db. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMER2406489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce33fe6fb5aaea8542514f33b17dd44049e3f37ce26b45027150b35f237385d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3EY2434143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5706872641efcdff798a7ed71cc9b8651d0f522aa0cf23af616c67b63b132bf. 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/QT3EY2434144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd952ee1b44a6031693210dbda04536d225b6b4dcaa995a0d4e72228e492418. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QT3EY2434147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7894c5bee93053a6dbf6ee4d962b08ce7753275c406f898a24b713594bc35aca. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:37Z), 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/QT3EY2434148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77cd0f73c0db2cce56ee118cd3e87b46e43f2122a37ec7d5599ab8115cf98ae. 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/QT3EY2434149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c3b20e60e0facc06ff95ad0217d09dc444b048431e309bf327ab8bf507437e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QT3EY2434151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39306d091a689d4272986cf75b9ed2ecb5f5d95357fa522b96d91c0316aea5e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWFF2535224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33bc332a28bcf78fb94aabe23bb0b093d102e3059348e34ad35524fdd9b5ead. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFM2548561.