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 0x5afa7f644fcde83267d95119ecc9bd5a3bbb60988ac365f52966477d279c9672. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45d038f9-e601-463f-931e-0a0390b0ed54.json and https://artists.proofprofile.net/proofs/artist/45d038f9-e601-463f-931e-0a0390b0ed54.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 0x130f8d2ddc7e5da94135d55c3fb48f3d806fb15ca776e53bd13c2044ba9988c7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM81098936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1bc4a99ab44b3e50d94e6d4c638da177a6475658316d886be8df6d6b24f2d9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM21964417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7423cc0539f89c42cd353ba30c7b15a361c5d180be57906584e68ef1030ef978. 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/USHM21964419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84b5e650e0b121d97dff41858eca017f7b9ee4bfc00770830a87986cd7c8dfb. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:26:53Z), 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/USHM21964421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f393be0c124f32ae86b5fb89a33a02b21117873e210b0925f40798f8634aa1a. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:32:25Z), 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/USHM20910365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9780e23b2019ad406d6e7aac51caa4f65f36a9f8a555b51bd7a767a710511ec. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:08:58Z), 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/USHM20910373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98e0821c07090a9fecfe1f7306c1289d17c7c1582fc3f8030d0defda4e860e0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCGJ1993071.