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 0x8d024272197c4b6f55b19c013f3490e079bec497f8be427da98a0b0e7f856729. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/063dcf55-5231-4187-83b4-92352f951720.json and https://artists.proofprofile.net/proofs/artist/063dcf55-5231-4187-83b4-92352f951720.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 0x9ab5e2a1701872ecf41953b7ba960caf54eb4e7c31eb0aa04bbde81c3c0eaed6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:17:58Z), 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/USL4Q2503903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb02dfb15302ea78ce33349488799ec99806d0a4feeed492a7709387e5902cc. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USL4Q2503906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738a4f178fa0c840f54f9bd8ba737714811ae01401bd2c8da9ac1747aee36655. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/USL4Q2503907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2617dc53593fbf6b2833965aa2a60c6eebeb472e269749957349a5ed9b909109. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USL4Q2503908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411ccfc1d162be01b3168c6a64fa58c31e39c8659c48ce2f778a535eacf50352. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:13Z), 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/USL4Q2503909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c9a64e17ebdf9fb82e025397940477e6e7b63391fe0af87cf317af69ff1395. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:42:40Z), 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/USL4Q2503910.