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 0x06e0c46995fee59c23e16a12d896b16d76277386518a683f73c809ff6203fbf5. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cecc8ad-15b7-4dac-83c2-a1d767e45316.json and https://artists.proofprofile.net/proofs/artist/9cecc8ad-15b7-4dac-83c2-a1d767e45316.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 0x3b61d1ddc6d6d98d2481d1443ee4e042b0e9f6d88baf117550a9eefb7da1452c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T21:57:17Z), 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/DES372200887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3bfe30217f0d1c2af2dff337ac075103d9c06933d7322fa6ddd27a94844540. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:04:29Z), 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/DES372301058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee92120e080cf3f351acd43cdb4d4ac8839451f6ac6d0d79fa50216be0e74b8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DES372401166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe4b062377ffcf3f4e814b98f98969395ac8e3c52c815038c99278e81b17e5b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DES372401162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c40cd07da809f13bbdda7354acdb5786c5317d629bd8a183a2a11d79c9d5b9. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:33:42Z), 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/DES372401163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b779f2e4559ec9f2b7133d2e1091c4613e32b889804e2a53ece306565e8e9f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DES372401164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e5ee48ca8930c0994d7b6d622ef1bc6c534bc910e456e5ddf6e195edbbde14. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/DES372401165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee92120e080cf3f351acd43cdb4d4ac8839451f6ac6d0d79fa50216be0e74b8. 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/DES372401166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c26a8136c9fdf0ffbce85c32f6fb6388b24915dce1c5faeda8cbb86e754b1f7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DES372401168.