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 0x33cd500a37d51210e85ad59ee514132c64adcda2d4075ef418df6f28be806c8e. 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/621dcf4d-af64-4cd3-a391-6bfeb50a4c9b.json and https://artists.proofprofile.net/proofs/artist/621dcf4d-af64-4cd3-a391-6bfeb50a4c9b.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 0xeae89d88be77fe6a9cfa6dcfc089a83f7903cb6c10998d839a7a3929e5765a6a. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:45:09Z), 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/BRB7B2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda123e3df7db24c36ebab03e868abcf377ee816563e69b3a4237283981116396. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BRB7B2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c8cc08662bdaf9fd61844e22b48cba79b6caee274d94968ccd648174a2a6ec. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/BRB7B2400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb830d0791a1fc90ff05fc1c1c4f9dd93df756d2bee322ef0992f32fba1b19a1. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/BRB7B2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff3b24f6a9476a028248caabb1519a8f4acfcfb1f367fcf8858180c525b5529. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BRB7B2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcfd925c823f536fee97e0732d1fedd7e23391ca9dc1ca788b54157988a6257. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BRB7B2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659ca41744551f121a9ea1ae946661f582531e3c1ab6bb86fde72e8824a5a981. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/BRB7B2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc911b30472e6125b18ef06d68cb4bbbb29f4f99166502be562f405790cf0e4d3. 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/BRB7B2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5386bf0927ce83fc5ef3650a592ae0fbc005f32481329838990b2bdd63aac0d0. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:37:30Z), 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/BRB7B2500019.