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 0xdba5fc061b63b3f4869a0cc66255ff8bf16eb6c68cccce8bd5bc41f7144636d7. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc411d95-5e0a-4ab8-b52e-24aeb764849e.json and https://artists.proofprofile.net/proofs/artist/dc411d95-5e0a-4ab8-b52e-24aeb764849e.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 0x45e20f5fb4341b09b2e82a226a836e99702753f13974f5a86c6a72a655085cfb. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:42:10Z), 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/ATR981322997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf897cd53838fb8fd8d24246af39c5156efa432237a231833686b579d5998177. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZS7J2534148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47adcaf93cd99aadd6f15bb38199541c2a50ec1db41deda8897401a4e4be5317. 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/QZQAY2557876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542c949f3913d88fe8c1811c52567cdd7ed7315bf154240b202c01904e3ee88f. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZQAY2545713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f63c56275afa4b56e42e9bed9875f3143cfa467443ec64264f0234b2090082e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZQAY2577499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1379ee25d166b4f1e0fbb60dce6cd8afb3a629f2a7a99fffa38fa248aca3061. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZTLA2558641.