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 0x3e3ac2afce348815152b47f1222dd0f329638faf4ed9e561d0936f37d5865617. 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/b1ba970d-63e6-450c-8174-afe59dfeb8ce.json and https://artists.proofprofile.net/proofs/artist/b1ba970d-63e6-450c-8174-afe59dfeb8ce.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 0x4bf9145a35be132d52a05c57efa1c20825d8af8a4af900a5d7bf6e5e05558d33. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZDA71975730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcdd2f24a12fcd5f0aa6cd132c5049708f5a6320ca82ad4684290977c45143c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:46:35Z), 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/UK6KW1900258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd022450839755542a940a5bc1b9783ae76bbf79eac4133207292e8c4992b9680. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZFZ22013803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75c8bdc2b4bb7c9dec9e3afbae9f84251894fc3fe14895857bd8ef016de8972. 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/QMFME2011429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c2aa578f373b03c15560c0bb8c8220ca4d53882cb37b1faa63f3ae3ab9eabc. 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/QMDA72255896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781e941c320a07766cef58d4adf118ea9c5f4ae4a437ccf5e0ea8bc784795c77. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:05:36Z), 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/PT7YB2400004.