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 0x5a0e4f27e03273091abce36c423a3d65c61b192d5d81cb4687b7686fec21fbfb. 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/839706f8-d5fa-4a26-ac72-777b13a695c2.json and https://artists.proofprofile.net/proofs/artist/839706f8-d5fa-4a26-ac72-777b13a695c2.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 0xa22b465cce888f345c1824d1e6872454a42f1aecb6c30e65bcb299bff95e09f8. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/FR10S2395196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22b465cce888f345c1824d1e6872454a42f1aecb6c30e65bcb299bff95e09f8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR10S2395196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1698cd58b34956fc0f314419e1c13bd038a31549f3f0176518e3f2031de6a986. 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/FRX872470034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5664b6625a0521ce5d072e9babbf0c41c4ff84c930dd2350b4238049920e210b. 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/FR10S2582723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0f413680cad076c6c81f15efeb1e78d8dabf15cfb5aa3abb7c14a0bdb82670. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/FR2X42573694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8848fe4cad4c41ae663a2cb3f2f93b0cb98a475a28a98f6b9bec5eb7a06d889. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/FR2X42573695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5664b6625a0521ce5d072e9babbf0c41c4ff84c930dd2350b4238049920e210b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR10S2582723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7640408968c128d55f76a4adfbeb8b025924cf5e197bd8182d63950ae9bd3898. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/FR2X42573697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1698cd58b34956fc0f314419e1c13bd038a31549f3f0176518e3f2031de6a986. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRX872470034.