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 0x6f91a70aaeb18fc04b68cabc1d5c8e92a4f129a6fb973f999a53a2efc442b828. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d79c270f-4893-4a08-a5f4-2eda76a24342.json and https://artists.proofprofile.net/proofs/artist/d79c270f-4893-4a08-a5f4-2eda76a24342.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 0x19a670edffe6219f4056e8b947a517106be6cda411c6621209e5c8bffd7d4e03. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR59R2190785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65e223f4978888f0ac800d39dc0cc7314bb58af2328e082fc3e3bc6f46c4f4f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR59R2190792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c80be3210af38339c85b75fef679a78f670f80cd2ccb69cae24c462a80059fb. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:17:09Z), 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/FR59R2190794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29abda67c1e5bf7ec617016f6ae6a94f469f8d32cb94404911f3301a6222acca. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR2X42148155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7815dc3cb961662258244affc7ef090c0b83f8a36d7a124cf321536228c7460. 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/FR2X42148156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf0d3039e2e24455b430ffe72fe7a23f1a5e63f5d2d1afd2ebc182b81eda003. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR2X42148157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e3ae6242e7028dfe49ac68cc6ad5675811697cadd23dd65ccc3e3d74251e4d. 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/FR2X42148160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed4d26d72f2a27cc49ad411c55f6492aa86156ecf1a7a07516f63da3276d83f. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T14:50:09Z), 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/FR2X42123848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688263d9d246733fef49e18413c79fb0fdd3a6a3be5590719378eb7155c936f6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMFMF2323830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02027ab4b9f79b3cd6aec98222856113fb96e762d85f7e53ee0527cfc8ab4d94. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/FR2X42132800.