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 0xa1a681098d2debaafdded5f4dbc31c3b0922be2dcd226c13087793186da5483f. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc8a181e-46d3-471e-afee-95dcacd23098.json and https://artists.proofprofile.net/proofs/artist/fc8a181e-46d3-471e-afee-95dcacd23098.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 0x5c22fea4a1997e7227c204da9900a2a9d93090f9ebce4c9038ae29d63a7bda7e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHZ52099245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cc4486d6546afc679c416f6e381e62936a38156a7bd0bf4ee5a9cbf56025b2. 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/QZMZ92096892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdce1aa3e7f05bc3433420610d6db1c10d4bd7c7b298477c03595aae0a3e17a7. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:02:52Z), 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/QZGLS2343587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bb126a0e15b7653d86210f6cf31125b52945cf629ecc7416d55a30d72fcffd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGLS2343588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6248a6f7abfadc9ac0499ac70dbbd0bfaee47dd260c76943e3f622724b3663a5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGLS2343589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fa497bb234efeed8e3c2ffcc3d7818511a916289e5111ffb8cabf3687883bf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZGLS2343590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c080ec90203274b1f79c9639706859740a7edcb99e0feeefd9a674dbbfdc6a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZGLS2343591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51256713f72c0f3c7c323d742caccc3e344b37b61590a015bcc8c0efcfe622a8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGLS2343592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b05df0c344cb30c3572a1ef9b2a11d2554886b00299d28967b2f6beabd66f6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZGLS2343593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4b5556cad3b6aea511fb6f8b9d7d5f443a210b4db90a4b53ab3584644c3f1f. 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/QZGLS2343594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312ca73cdcee7a5742ae1877c287a2b0eb0b888c7d9759f0a3fc35799056008c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZGLS2343595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc48cd457b7484e43dec331ece6428efd406a41699dfd1e9947a16d4ceb5bc1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:06:38Z), 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/US7VG2597484.