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 0x46099c474d33ffda645fdd93a035075fd60ea80a7e451bfa7a05474b21ecfc66. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7cfeee0-a49e-4987-85d1-ec539e424836.json and https://artists.proofprofile.net/proofs/artist/e7cfeee0-a49e-4987-85d1-ec539e424836.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 0x5e4de3b91564d391705ef4e2d5cc9bb8330a3ff94e574ca3fcfd510f37bb38fe. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZK6P2403546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184fe5ce1501cefcba237bc328fea3d3f65b24f62040b59e96a35e6914e94124. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6P2403547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da00de6029215908e8a00b8d14015b234d10326b133065b60dceb2ec9c86374. 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/QZK6P2403548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145bd083a986716f58d7742b1a55fd91053b22196a0a7a01e0d8ba5622059341. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZK6P2403549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe59c5cf76b9e66396970bcd2357b9d67c17e17eb16c43bec2c62358d23c307f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZK6P2403550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc20c7bbcb77302cec20cf2f61fd84d15edfe588983d1cd24c5af50239da8543. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZFZ62519993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18922fe54dd272b6fcefd24ac8d7b10aafaf0f142abc8496ab37457b3b13b809. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZFYZ2534957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a1f9897b129dc2662171945399c54805872e0919bff1c80f4403f558b51946. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFYZ2534959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba8b9cb4bf100ad50a43998b3ef0e00be87d18419ff8a8f64b0af4abc8a9531. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFYZ2534960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11dbfdb7836f871753af1863aefe463635c5f4d70b3a08947108d590fcedbc63. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:43:51Z), 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/QZFYZ2534962.