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 0x1db8494eda10b68d2bad8b2593049a235e38567ba3718c92c3fb4dd24fd88a82. 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/9fdd0dd7-a214-43fc-81bc-967cdf5f8dae.json and https://artists.proofprofile.net/proofs/artist/9fdd0dd7-a214-43fc-81bc-967cdf5f8dae.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 0x6ce917cb3b8302a674b5a8af2f2f5d9bcdeb1437f6d6afe22ff1d13b72a02eac. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:52:48Z), 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/QZK6P2452647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace1d189ef405ff46fc93f4885ae5501024479df14522cf0121184e2299c97cb. 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/QZK6H2466503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e2bc3ec6f8ccdb8cd1fc70fc0e2c5caa0fc1404982d1a40e0bedbb175aa747. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QZNWU2458133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544a94f3af0d889606f0c6689a44bf64c38d474370266ea8dc5e75a08b1beba7. 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/ES71G2423277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648040971a9bd0a926e03f489d7c692751d5d698fe542543e17a5bd5b6742682. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:28:07Z), 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/ES71G2427607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53f08ad5d2da7000d8ec8ee16a23e7977d5631ed31ccbaa5d059310b74ebe3e. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:42:48Z), 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/ES71G2427610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0793a5f98ad86ead9d08bf296ace22d155cffa5f655cc272610e9b01e394276. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/ES71G2427611.