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 0xa291d9571c889810ecbb035817c22d823bfa15b1dd926b0b801413d5f56604e2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/729b121e-b562-4bc2-af1e-c42b423a9787.json and https://artists.proofprofile.net/proofs/artist/729b121e-b562-4bc2-af1e-c42b423a9787.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 0x0c618885b85507749d936d100b363ed9779a4724b1c0222b6b7a534bf6d55e12. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:37:07Z), 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/QZZ7V2428862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35525f5e72893a5652187b950d1d0fdec616bf77e0a2eafc9d12311b488538b7. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZDA72572735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1d4b0457cccffee384edef1d120986b4e51d7488695ac1322f22bea6d1664a. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:39:21Z), 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/QZDA72572737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb8381c67f75e6470d5d687d138738d65590e28c030eb3ee30981595415fdd6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZDA72572739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1c4294cf2513aae4fa67ca2f285660b8e3b3771c96c7c9ea2c380a264c4b8d. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:18:59Z), 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/QZDA72572740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55ed0221ad4249742559703a2a014df87cc5962ab7dbcd6b26bb1aef60e7ae4. 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/QZDA72572742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aece1c5879bc80d7978e713034a2eaba04d91ebc85b9f4797aaca491f837f68. 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/QZDA72572745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9847397874bab9d151972b716a5c0f074c2642cde32d18744256f0b423732325. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZDA72572747.