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 0x45a134fb5c1fc4b7cfc3d238d1dbc58c4bbbe3a64ba0599dff5f992ae54638ad. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f0171c3-9f7b-4742-a32c-d5ef7e4eb5bf.json and https://artists.proofprofile.net/proofs/artist/0f0171c3-9f7b-4742-a32c-d5ef7e4eb5bf.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 0xc5ce5c6579ffdd4af5f1811152e976aa43a26599fefcaef18cbb26376e607901. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCACP1627831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5f58e9687756b7932cd2c2e4b3f0564ce41483c1f3bd97b28d64b8bf095236. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GBARL1701362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c1b633f2a469abb1a5a01f5d8e12146acb4e7f07cdd496458a46e1e9cd091b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GBARL1701593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423da2656228b4bfcee5914a6e972c9b19fa1113b3b65e7dbb6550b5660306ef. 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/TCACW1763997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c352a7462e4f1593d4be5de75f5b56ca2a1a3860f5f3ef3f5004dc5b9355702. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:17:59Z), 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/GBARL1702300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56816409eb945d97bc6b823193e862e5834a8b2a34b4e47273f77117f5c9db29. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/GBARL1800472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43f28f3134481ad3357293df8592c517b0803a813e4cfe8a286b2a8ab188575. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:41:23Z), 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/UKW3Z2000352.