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 0x7953ebbdfd5156ee1d13ff5b6d25cdd452a213c38642d0afe5d1efb44a04b03d. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dffc61d0-3fec-4564-afa6-782de3830310.json and https://artists.proofprofile.net/proofs/artist/dffc61d0-3fec-4564-afa6-782de3830310.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 0xb0db771c202875c4a30bcd093dd06b30c971e13d6f869e794d99c5721494ebfd. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZNJZ2294175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d14ec2adb9d53c80f126ec79330af877f62861d0c6f98bb35f0274b465b305. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTPX2210520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2b01dae56e5fcece3c993e1e057ba2ea6f8a4fa3b928005440985e61f8e584. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:35:14Z), 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/QZTPX2210352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3616b3ca10a81cb4cdd5fc1c5589addea00c83e73e9706cfcce99093b28c3cff. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZTPX2210942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c35fe8f638242fe39102473075771a02275e1612e3922da859dc4ed01f6e717. 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/QZNJZ2294262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71ecf90f34cf47715cea5f2922276803f66958461600ea7e794067155b5db44. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:27:38Z), 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/QZTPX2210340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeded08d0eb05f10345a545395635aaed74b999a2b31ab8527fa44a060703a495. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:27:14Z), 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/QZTPX2210470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b0314e896607488a8b4777b3453e9174c4265ca43f01b12d53e65e0800ef42. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:04:25Z), 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/QZTPX2216038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5d7affce9cf4705083488b840b08623696cfc98f33c17e094a780c15bb0fa9. 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/QZTPX2216565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2704088ed579545839ad6583766ab1db94486faa1c3cfc9037f71737fff5b2d9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTPX2210462.