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 0x4d7760539b6fb410f90947881dbadc25591f447826d0c18c13b910b1e5f5f128. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/620fc677-7898-4714-a87a-9bfbb02f5f5b.json and https://artists.proofprofile.net/proofs/artist/620fc677-7898-4714-a87a-9bfbb02f5f5b.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 0x1cc1485e477b5d2643f06d4557ca162995af829f248c24fe7f3276592520d415. 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/ITI029800160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a4558769b8cd781bd0fabf810264c734418fecc4e9e7c01c05e866dd256654. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ITI029800161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c811d98da57f89958715b27839b6333d30b718feac2a6aa7965a8cf8c1cce9. 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/ITI029800163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6407557b37d90ba411eeea74bcf255969e1dff39d10d345c14aec74e541fb0d8. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/ITI029800166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6018c73142d351c12e1cf15c54d99b606d4afbb6ac8f0769e7de1444008ea14. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ITI020500129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7914fb331ebfa29fb04e83e01fd7658b6f58926e82e435b54526a79e38495ea4. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ITI020900523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96608718f44aa29dbdc85c1827d8e4bff7f1898e9db02d9b1e5c64778897943. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/ITI020100158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a245847ed81beb59894387b603506d3cc834d64c7115d581050f93a139bb026. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:35:09Z), 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/ITI020100160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c811d98da57f89958715b27839b6333d30b718feac2a6aa7965a8cf8c1cce9. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/ITI029800163.
Acid Jazz Brazil (Nu Jazz, Funk & Soul with a Brazilian Flavour)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd0a5b9c0f3cad4ef2bec14cd2651241b258d5efa3e116e593133dc6295ef9b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITI020500086.