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 0x6d2601ada96a217406739b9b430a9347bc1ea526f427cd208cc3912106ea36d6. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/232abf7c-e911-4b9b-acc0-abcc50462156.json and https://artists.proofprofile.net/proofs/artist/232abf7c-e911-4b9b-acc0-abcc50462156.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 0xba7739d6c62fdd07f1fe25ac6d62496af26d5c4e746da9826684a895bb4faaab. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZANL1781091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749bb23096dba022aa54032ce945f6ee4e0d170eabca928d42ef44e2bab87075. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZANL1781092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe270a9ad1442906b2f3b0ef0c25912f9d288cf9e0ab1cd4f1ffe9693c4884898. 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/QZDA41929375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec7846275f57a2e4767bf4f4115544137537e8b387c5eef9b55ede39bd4485c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHNB2302554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f68bb5a7d0b5e3f49b28191b8085a46236476cce0a880f6fc128e9ad058af9. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZHNB2302555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8a81b198e083144af1b1bdf05acc38b6950f3189663a9cf3e6c6431fcbbbe2. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZHNB2302556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941e9e34f6224331759133a6e6593b747635d0a42d36326a23d09c6cec6e14dd. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/QZHNB2302558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eefe5df4763a7b7b0eb6dbb197d87afe682ec88da23bb3f2eca5c3e00763ff9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:54:21Z), 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/QZHNB2302560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5b975bcac6f62c06cc027c68a97256eec91b303533a78664621cd4abb2cf0e. 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/QZHNB2302562.