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 0xabb686dd9a7467ac2d51aa56910a2d35ae182559bdeff0261033d6aec41d1ef7. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb6cc8be-4f8d-40a8-a13b-ce3c5e1d472c.json and https://artists.proofprofile.net/proofs/artist/eb6cc8be-4f8d-40a8-a13b-ce3c5e1d472c.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 0x9df60e939ddf075fe9bb333bbc9dea6a01b18d77d79f90c923b6e12ad4d3e5bf. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:41:26Z), 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/QZTB62555264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e63d0c73bd4bf62af09fbd7c3d93a2df742db915f83bd8184156d931d1c002. 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/QZWFX2574572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a7640ed8866c088c8c970189013c331efa8629a5a02759cd7b0f50e2932d49. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:27:24Z), 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/QZWFX2574575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3596ad43e728827c74b89085166aa0816a971a7ad8a6e5606e4f8ba9334f8e33. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZZ7U2583042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd253a6acefe26917fffff87b0b64cc36888af03e8fdae177b6b9a5ac5f945f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:48:20Z), 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/QT3F32533884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5eb03583c627d2befd02808c4db809796a1704a1c7a5969db956256ac115d2. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QT3FB2544970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f63b91f02fafd11f7b95a1b123d6759f46ef0fd14ca7169550b1d55944374cd. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT3FF2537783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4f13c7c25d6ca2f4bee26390c3b6a417cf5f76a820ffbce5ae5c5413ff7b5f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT6EA2598684.