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 0x7a30c2269e647abfc5e5964a69d9a27fed4b8c7db7e3d27e124ef70521e4f318. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5a2adc4-fcb9-4098-bc14-2b442f397a8e.json and https://artists.proofprofile.net/proofs/artist/f5a2adc4-fcb9-4098-bc14-2b442f397a8e.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 0xebb6e006b9c5c0a266ad7342b6c37d80f05b3c2b07f5a2b69f4050d3c34595b0. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZK6G2390766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a603b4323de3df084ec3d727fc2bf676a54eaa6cf0c71e551e665abcdae7479. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZK6G2390770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7a6844ff7984ae7cea3b8daa1e44f8da951f34b63a5d423c584e6b9bade2f9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:53:11Z), 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/QZTB42533080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8029d9f6b2b6c9d832257a3eca5bf31ae640981c455392e7e4998c934de5be3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTB42534249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee6416eec2c0c16cf4e0588438e28daf589420cf4c3c0cb4a7147ad0c214a44. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:26:58Z), 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/QZTB42534250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7a6844ff7984ae7cea3b8daa1e44f8da951f34b63a5d423c584e6b9bade2f9. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:08:07Z), 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/QZTB42533080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc289282840054d44ac28d8942dcf81b6321b2980e643a30af52f43af05ad959. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZTB42534251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc885ac67b6dfd63bcbc8077799eb7486b5926be3a7d8bd173f7ef26a4580aa1. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZTB42534252.