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 0xd56f79a4d0219cf3516fd48141bb7fde495a7e7c0a059f257e2c154e0d927c12. 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/4eb452ee-2337-4886-b574-6bfa1e3b79a8.json and https://artists.proofprofile.net/proofs/artist/4eb452ee-2337-4886-b574-6bfa1e3b79a8.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 0x1123b101f4f26d837ea74653f526e4094b03ba60dc40beb46d093db6b1abc8a6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:59:09Z), 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/SE6XY2337758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece8504c0e4d65a4c696e74919768bcf7afff3dc0eca0b23023a41107ff09d01. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SE6TI2359792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5451e44472e7565cc240da50f3dda2838f7e5ba3fa489d79543a0eb77a234826. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:21:09Z), 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/SE6XY2327391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292d1857f52ee52e08b6b72d2c3f201455229325c7f24cf596159dedf87d171d. 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/CACWV2464884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cb262f595fc5c53c10d0121bd588584a593796c1c1422da6a70ef7960a8e4b. 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/SE6I32454017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8625bc1ea3767988f920a7e2fb33610a436bad19c355057fc20e764532dcd241. 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/CBEYJ2420974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631b3f4f27af790f97dc40364ac8723984312fba1759123afa4ce6868996b858. 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/CBEYJ2420973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d50cd431a98c0b277471b0d33c2f9a368d90d6beea050f3c6067d53384c40a8. 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/NLCK42413872.