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 0x6df768ee1856fc212733d9fd46cd7cbb44a38863c3c3935614eb179964c449c0. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7cbc53e-4116-4875-ad52-fc0f649ede0d.json and https://artists.proofprofile.net/proofs/artist/a7cbc53e-4116-4875-ad52-fc0f649ede0d.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 0x04054e3e24f9206c82882b6dd09eaf6a9279d028ce70138484499e08b41ac5e4. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:02:18Z), 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/TCAFU2141708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335c631e3c5fbf42186c21e26e0c1d7b6e008865ff0a49be83d6e4de30b8259d. 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/TCAFH2098681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fbc799275371fc318bca9a553431177a5942343a3a3fa205d717f6a3a145c9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAGK2292446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe16753d9bb65dc3cd5d6253d9f19a3e8f2f18a1b56f25104fe3dbdfcb4dbb0. 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/CA5KR2371431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a7a81281b5587facb7f5398809b816168e4b21a01bf58a948f3a05d42ee6cf. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/TCAHJ2312156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9066a4403160cec263854fae173cf1b114e809ecd655788438c05e2bba5070d2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHS2354147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c283d005410e1bd7d7b8c630f3d57bd88a75d3e0252f100d33d61273b74e80. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:28:55Z), 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/TCAIF2424697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2abb10af6f226b5eb0e9ef8c8381963848fa0a1f561fc94258bf03bc475e6d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAJU2576191.