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 0xc9028a3d27095031f49bf9d9cc3538dee17718e71e02458ff04ef21b0217cc58. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec3220c3-ba35-4389-a094-d1e4b5d38bc5.json and https://artists.proofprofile.net/proofs/artist/ec3220c3-ba35-4389-a094-d1e4b5d38bc5.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 0x4bd6e382b46afc3eb0e8b750199cb286d136d24b588a924b9f9c2d580187377f. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:02:02Z), 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/TCAIO2415661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127dbf2ffafe1edac92405dfa804daedcfa2be4c29ef48b7f28609d7e3994fe7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:00:22Z), 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/TCAIO2455449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4af97b7e96a3f20dbfac3577fef63e1bd3ad9cc11591b0f3d873f7397474956. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAIP2428813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ae122a59442c23825bae8849ea9596b5aae02efd1f57af1d6081ce09894763. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAIO2494267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d356a13ab4edcb98bf0a3b96f1595965a373835e9818f04338bd8853f62bdca. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:41:15Z), 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/TCAIP2421322.