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 0x56ec52e2b6b8631d354e050c4a21bc30623ed8307e88846f793f178067dfe00b. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da8d5e3b-4c90-440d-a85f-c9a16a9d0408.json and https://artists.proofprofile.net/proofs/artist/da8d5e3b-4c90-440d-a85f-c9a16a9d0408.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 0x35fdd7c3fa09afd83345673fbab58b828fb2abb574acc9938b965671c3ac1d53. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GB6V81212340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e12298b68d1d8e57b0c7bed1380f951f31a80074b0028c29b802bda0e4893b4. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:01:09Z), 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/FR10S2053192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a88cd17db0e908c1ff25022a2cceb2ce6904d03e582ffb0533b5ba4dedce87. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:56:55Z), 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/QZHN62176264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0a798fb4d19f1b971f1d0430ef47664d728f393aa3c61003fc6f2732cd9091. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/THSM10551812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692feaf918bf72b8b358a01b5a1219de09e614b013b5c48f0cbe9c2205cd4120. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/THSM10552133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c792b9765930f5ebcf329f492bdad12b5baa9e38e57bb8dc55958684ac715a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/THBLQ2400101.