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 0xcd266f8a08ca8d8c19b6ba13edff8410fe22ac4b0476edeedec744b45964296c. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7666dd10-4739-43b1-8091-677b906f36d4.json and https://artists.proofprofile.net/proofs/artist/7666dd10-4739-43b1-8091-677b906f36d4.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 0x85c037a5dbfd88a53891e9478674a208ccc4b6044d0fe608a370cc166cf29010. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:20:42Z), 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/GBMA22470910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8331079bcc5ee879a73a50ac5db40defeb4714f318c0c50d16ac6b1b95c746f0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:55:16Z), 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/GBMA22353989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e9e1e73fb7295249e524e9ac2138ca29cf215fb6c2bc2e8e3a89762f8c62db. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/GX53U2416521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d10554ca9aabf94b762921ed8724a034237f42d8f5a1c8b98ab7802e7ff0918. 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/GX53U2416522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb50dc461c4e53b4559ec59a879b7bfc38f20b2352f80f40d4d2ca0d9b59929. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:15:36Z), 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/GX53U2416523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc4bd7f4410e60655985fed3f2466bba8b214c5b38c923ae59253ed57cc311b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:27:13Z), 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/GX53U2416524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec1d8082179947b11e23bbea574448db4552cf77cae3f1e848971a1d87b01ca. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:34:08Z), 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/GX53U2416525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428a2478499b8f3208c5b59f29bf455143d58a9a311af9224e0ecc282265aebf. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:24:31Z), 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/GX53U2416526.