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 0xe13482dcfb562689f3c38641dcf087660684e3143fd7ce98f53744e69a8616e0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c5abacd-69aa-49b3-b36b-7cd82309bff5.json and https://artists.proofprofile.net/proofs/artist/8c5abacd-69aa-49b3-b36b-7cd82309bff5.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 0x0165295b2bb89fd950b3ab9cdc2f8a6f3fb321cf724604fc891ce54e46b148d0. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/QZNWZ2226301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82563322e490198cd5072b22a53e17ee46ddcf6b61b9710839c48768a9961c68. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZTB42292575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f67949ef48b233b48d5aea99627aae5476af971a57313435182f6f268dcfa8. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:11:43Z), 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/QZRP52232604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6fb09f0256733275e0ef120ebc0e2654fecba6d118ed03df896578d6da9d87. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZES92268072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d094f8a390bc41057115027f3b7ce19b8676489409a739a374d512e64ce0a6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZES92232423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542f676d35efa239f744ff2b0bd7de0b0154d38b115da70291fcdfed20e87e4b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:53:53Z), 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/QZES92267665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976e7e0ee41e7ffb2aa3b080455d190c49c7fa939c73da6c4ac2ff4dc653e58f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZS8H2109901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520036150da67b1e28622d89b249e345becfd06aac74a0bf95fd8fb88941de0f. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZZ7X2495653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a343de96078cbd1a364430c5d68a599dd2d6c56c9fee7f299499e0ea424fe8. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZFZ32521703.