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 0xa6f897bbc8072b0ec9bef23e6c586c652ceb5a8192156c595b42aea6ce6a877b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abbc959b-a338-45ad-bf45-4bcaefcb81b6.json and https://artists.proofprofile.net/proofs/artist/abbc959b-a338-45ad-bf45-4bcaefcb81b6.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 0xdd250d96b9bfc628aaafb1c7434793dd9cf4410e20e407dd6cfcf8d1cf5f4275. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GX4LG2101091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24610cf85ab3559638f97014e879dc3302d61d0cd2bae9c25179f909933ae013. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB8KE2309348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1f75fd4fa19e444641d356eb79909a208ff7e30b46785517df09c0ddd8de3b. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/GB8KE2316294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c6d09913d0837366582fd367bcfc7f3f97bc1e7679bd764a15464014e8bf26. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:18:49Z), 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/GB8KE2402433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e53c82ebb6c8d2090d18814de967ce918b875c7be0d1eeb7afad6aec168f06. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/GB8KE2405592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811963c5d5e19a25981d1f547f0202079f048e276114459af2f2cc88a2eea2d8. 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/GB8KE2405590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5723b57c396c66e2bb67b1bc88f248215828feaf35e57305832f5ee97db88a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:20:50Z), 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/GB8KE2426548.