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 0x9b7b6a71226708f660a05ff03633222e93290ba503b078a9ae469bd8e804c6ca. 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/5750d09d-7e12-4908-8907-e89ab95f29a9.json and https://artists.proofprofile.net/proofs/artist/5750d09d-7e12-4908-8907-e89ab95f29a9.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 0x300a268ba12824ab54e4c58f6995a129abfd10e01081df48c55a2522e089fa0d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USJ3V1370264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580eb181d0251dc8201c74977eeed6c76fe6a5159636d96d5ffbd6545c00a09a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USJ3V1370267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0c5c3adbb74f94c20c45bedf32156ec3005eeebba5361ca534e79ed499fdf6. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:25:23Z), 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/AUCMJ1600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f2573f0bd38c3882e14949c32a349f49de4134fb26b4a2dcb065db932292b9. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:46:28Z), 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/AUCMJ1600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2740792f77d767ca91b5f89cbc263d5c676f4f7f2a2a06d2f031f3303887a1a0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AUCMJ1600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1ad7341273fc2f95f2ccdf2620a6a2b0d4e9bbaa32e0f35988f3f5c0dec625. 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/AUCMJ1600016.