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 0xcf1e2a15b721beefd7068169eea27c2c0f2a0b31645b51cc0bfa4d9769248c68. 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/2b254eee-ba5d-416b-82c6-05b4fa8aae77.json and https://artists.proofprofile.net/proofs/artist/2b254eee-ba5d-416b-82c6-05b4fa8aae77.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 0x6d8dbe2105150dcc462da3ea23ba04f610c07612623d0bcc1c778467cbdee159. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/US3X51635901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9f6909845673441475845ebd9ed5fc0439a0bfcfa00fe31b63a6c53c0f506c. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/US3X51635903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9a979d90db4cf36081b4a1af29e0818b14d7941e71c15a3736e09fecb8f3f5. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:21:51Z), 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/US3X51737302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3c0cda5a39c91689d81bd2fe3a5f0c97af60c74609fa8e9da72c973b331a7e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:35:15Z), 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/US3X51737304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54fec396c28ea93d8b248e0ec643b5bb5eeecbe483dedaacce9a0f867c11641. 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/US3X51737305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874d3076b7b585fa7d97e416a7682dc88516f58e2e1fe42d4040dbfc9b42f6d9. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/US3X51737306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5a52880a6ae87535d5aeb38fad3ee59a2b2ba9d93a8e17c8bf782e9ef1617b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/US3X51737308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e25099ef589805d668b8f7be657a29fb9f0cd070daadadaa15164e42f4fb76b. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:03:20Z), 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/US3X51737310.