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 0xe95de890844b066d53ae5b99c139bf3e45ea11d01d1e8beecf37ee08a14c1d76. 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/82e69017-f2cc-4b0e-a984-169b1fb94853.json and https://artists.proofprofile.net/proofs/artist/82e69017-f2cc-4b0e-a984-169b1fb94853.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 0xe3c871e6080083968aa978eda38c5f0ac34ce992fe654fd241f969d4c0990dcb. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:24:42Z), 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/QZK6Q2111801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ab3cf509d95476cfa12bd5fe0c3b2674177b000ca02853ba67b44d079561ff. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:29:25Z), 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/QZK6H2169259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1c4494650afdb7b9721b97df0ded5feeedc28a9dda7ae5367934e6568799a6. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:19:56Z), 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/QZK6H2169261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab08af049f4202776d48ea490cd3429fb1135f2569e9efa3283a8be42e81957. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZES82241449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00492348ecabaa7a7ff36f4652c5e445688e6116278495807c31379f604e92f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USA2P2352568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc584bd147f219f90305486f97530871dc4cf628be3e28279f73de2c603494c0b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTV32503008.