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 0x2a0ed8a680acc837b5a590b1c2a878cc5ffd34d682113cc9f2aff31c9be1a7b1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f81838e2-3ddb-41b6-80a4-e28ccc7910d8.json and https://artists.proofprofile.net/proofs/artist/f81838e2-3ddb-41b6-80a4-e28ccc7910d8.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 0x64af2c45d5155188e9e0604260b3211cfa578febaee60f5a3abb5cbc158ecaff. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZK6Q1934302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaec430bebfb9b443d62890ee5f3ece312e018dd52a786e3f62f45c82684107e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:54:26Z), 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/QZHNB2052578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1174b39307cc68e10ef765d2eb72a0453d9011e2166a4f139ddb83bbae5f1e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZES82237868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa104b45f16087695d91fc6666f24d28d3e4235b95a1f634390368b52d2736d79. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:52:18Z), 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/QZK6P2302570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6901acf0043e6034d1f21a795fe1d98db87f4199f5f19ee3feea266bfa936ccf. 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/QZWFS2456488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6901acf0043e6034d1f21a795fe1d98db87f4199f5f19ee3feea266bfa936ccf. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFS2456488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdda0274eda7f90b55e0acd22957c2597d2cbabc7bb65bed5ca3afe7db66228. 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/QZVEM2388569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4f6f8d75b8a8e07dab1602d03c44e615ee75fd310829f64ee78ea6f0567fd8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZRP42530282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5619d520f7510437861a2a2885c90ab7d092d2e2e0bbd1178424526c54c74f97. 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/SE6TI2372556.