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 0x7553b83617cca371d5a6cc253349877b3241430882ed2c85ff3d2a5acd586124. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72e9aa76-dbba-4e22-bc91-df492bb61c78.json and https://artists.proofprofile.net/proofs/artist/72e9aa76-dbba-4e22-bc91-df492bb61c78.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 0xb6436236ba8557aa710c15f244992de0671eb062efd09228560608200eb4af4f. 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/GXD7V2403694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01fbbcd7a795697ac3b96fec59800bdba53771cd18dd7a4a823bb1724ddea94. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/AEA3A2211362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c37d3427863386b936a544f14205eef93a7a087ea857437e8459d374914478. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:24:46Z), 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/QZHN92466410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6552d5fdbdc2d7c5af741c6d9225070213ce754abb4dbf2c62989db63ae632cb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:58:52Z), 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/QZHN92467385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb1152d4d279630bdf251974247827a0f3e7bee4eeacedf293e672e06f98ad1. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USLZJ2434366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c50a797aba5111ac9cad31a3aa1b88209f55f74af09fe346ddba8b995cb2864. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHN92466353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09aeb1e95e4a88b704b57be589898c7315c43b82a774a997d72d91d49caf8685. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZHN92467149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecc92feb3bbec9d156958cc62e75ac44f833077bb71a3c25c90a876ec39eeaf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:30:53Z), 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/QZHN92480678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f7f3f3de9b3efa566ffd904682c32157738c72bc0b16a76e9c6f4c1269b0e7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHN92466743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02ca2b341da862c956a93e09377c324ea87fa56bcd3548620163a48b7f87868. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHN92478898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0d94cafc3655bc311cdd6fa1703b88d2db370c6b3e3359ae91c202832b7b4f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USLZJ2434246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab5abaf2471ca6d7059d601956ec2304715bc65e06bd4d5bd350f8460743eae. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLZJ2434224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0518467c0d658ea7302dcfeea08a500ef02360013e5298d661f1e0038547b07. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJY2224148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd353221273080f21c6afd68080032ee33aa0d45bc5a063ce5e5abd730a385739. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWV32457506.