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 0xa009a6acb22025174dd2b5b33de547dc641658d70dc67a1ee600ddb8f93416fb. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eef4128d-9445-48a0-b73a-236d455e7bfa.json and https://artists.proofprofile.net/proofs/artist/eef4128d-9445-48a0-b73a-236d455e7bfa.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 0x3276000ced5a43e2b5333c4986c5be98e09f752187f24016640dece033bdbe62. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZMHM2497206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f155e3425d335fda0172a1072e4311081dcce956d8caa4c7a2dd02a9a6a148c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMHK2489808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb608c671ce3a956d533109559b3e6b55838a515ab177a9baa8a2c99654e91919. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZMHP2445780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916823ae42ce39b2353453873c292227e66ce94215d39bd97a5b0d3389dd82d7. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZMHK2472614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e168281b959f53843b9fbced7f76ad804ce77357f219fe7d8c861cc078a432f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:29:09Z), 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/QZMHL2424286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8baa2fae74ee313f9e8d0820648339c3055c8b13ee79574d9a1b212d454b55f. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:03:28Z), 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/QZS642483270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab4f623447aaee0d8f97417da594e35a7d626bdaa475b6a553ae726ec4bb7a5. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:08:03Z), 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/QZS652407114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34b453475b9890e6d9a3508422352e962f360c06323794bf6205f4a0bae14b2. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:09:59Z), 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/QZS652466622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00decadcbd88ce982e237223bd6f0aa30e76a9a3ed58f9b42b46f4e05f7fb33. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZS652413734.