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 0xdc28e2080a33918995d311823250cccd349c58db9be8825a2f35a55168de7f2f. Chain 2 (Bitcoin): anchored in block 953627 (2026-06-14T11:43:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f337048-4596-42af-b420-d40b34c00416.json and https://artists.proofprofile.net/proofs/artist/2f337048-4596-42af-b420-d40b34c00416.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 0x7f7c89318b46e6ea0d5cc2bce2277fd7801a779eb727bf07e973b1e679ada7cd. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZHN32220689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d15bf1fe16beb3a1ab50ec9f0325227211338a5ae3aef38483e6ab4d9045d5b. 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/QZTBA2267369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c56eec1e5ab2346648ce2edc9dedaf6465a75f0ddf127c2ac5f6c1868c9a58. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZES52322631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf93ce74fdb76bb1e25cb5d035bc89910764763b509c31e65c3011ca861d741e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZMEP2339051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3563e4e6292b48a99dc98103c58c4760421bfe0636cf1d6bac5269e9753f42. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:27:51Z), 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/QZDA82408851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa380c2c474f3ab3bdab65c498c64829f366e907b70d749bd91ef4236705c3cff. 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/QZNWX2458034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc18f7da136ace7fbda2b71444636e76c31f65c9687bd9d26f58160d5e3a7b8. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZTAZ2426868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23276d54a8855ab9e291895f1c399f4167d3b03e88d5d1535821a88392cb4b6f. 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/QZZ7K2487353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d82de8f6446fc6952087eff807879cabf50377e2e22917a053ada581cd2ebd8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:09:15Z), 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/QZZ7K2487355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5099bef75cf226d8692ef796dddc8b4c23085f1e09e9f9d8d60ac369915dccc9. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZZ7K2487359.