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 0x7ae2230510e54191c286b88912a4df6961e4fc70097cacb4861775f52c6e7349. 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/4112a719-8804-4e3d-9c96-6c22516261c9.json and https://artists.proofprofile.net/proofs/artist/4112a719-8804-4e3d-9c96-6c22516261c9.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 0xfc7dcd88614c1dae8773047e2553787045c282a34760799dccb4c0bf8384a420. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UKN492402679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc299c0ab571378f07e3d01d974d21419af3729bb10f51cf28d6a4bd91650e0c8. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:25:51Z), 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/GXFHP2452670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a462fc543bcbd54a0b282904bab83b1fabeaee1e6fc3cf1cb63932a9ffdf27. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:00:26Z), 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/QZS662485167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbfed4e93e1a6b8e02d9298f15769ebb03f30d9664f6fcb810527509079ce18. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZS652523450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0770c6283946c6c4281cbb2d3bc996d2c453776af22ecb2fae38a3babce6819f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GX3HH2419476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd826b31d5550e4988ff8b76f7dd8c70ea18967952eebce2d5be95d45cfda53b5. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/GX8LE2319168.