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 0x481371ea27dda0d4f6fbb4794b0ef477973bd167278a4ee3c0ebf8b4a8facb3c. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2128cdaa-7f24-4dba-acca-56192bade806.json and https://artists.proofprofile.net/proofs/artist/2128cdaa-7f24-4dba-acca-56192bade806.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 0x48ce9ac25da409ecdcd3a619d2daa3ac93f9a02314ebf2f92f82bf6acc8c7bda. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/CHF092100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bef1e830dec1c024f27904beb644e81eb417eade93c7fc4c253910ceb76284f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZK6H2207185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06da2c3914d0f786c9dc8afa9def9dfd8b13d088c665673a27c1d26df6480d5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZDA82323259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d2a108711ee36c551be464b7563802c27dd7603eb38962bca57ada14d7dc46. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CHF092100092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958851143a43580f7030e7a19ded2ed906a7fe4af22c1fcee6222258b6aff91c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CHF092100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e67ae3cdf6c746c8b9b582e1c9686e7c59c471f47fd27b519a1c4aa4771cae. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CHF092100094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975ab6688af3da92307703010ee5d3af4e96837c6f96af4f0ef3f2683ec68fbd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:33:59Z), 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/CHF092100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e8912f8fb2ae8df811f9ac1455ab11e12fc2483cb4ed80396caccd08854903. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/CHF092100096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcc9d39d43fc8357355692781d7e8450db6b2c0e3df32b34fd037b2f5d35cfc. 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/CHF092100097.