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 0x40c03a840c30961eb68e83c560bbdefa89cce2a4c531fb7ddf6a83da62ea7b36. 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/6a852e14-7930-4d27-9cdd-721d5633b182.json and https://artists.proofprofile.net/proofs/artist/6a852e14-7930-4d27-9cdd-721d5633b182.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 0xd5b328ea56f1886a5a404975640482a33a36ffc2a1970e275cf5e2d252a7a5fb. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/BGA671157502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed63fc2b75f5360976b2acb6e283c61a014b51bfd5ee8c760878c4210975cae4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/BGA671157504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe472b6d942c692e30e1fa57ff96b31cd46a72727be6804c9f8b10ca10ed91dbb. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:22:51Z), 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/BGA671157507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310a3a4d83e64c31b6699a20484c5c84ea26e6f8f2836501a9d70cee490df73b. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:42:55Z), 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/ATAJ19400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47aa1ef1fe8481bc98e886b8f779892ea6ada49c8693baa8dfd54ba113ecde6c. 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/ATAJ19800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f505ad6ebeb06d5fd4adf5a344a528d1ae37a206e861f6d7c3c11530a23a36a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/RSA222300446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf783b69aad93b66cfa7272db8690a2132a1e4e63c158996efd0735e2e7ff5e62. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/RSA222300601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d86c5b2d1e3ee976994e80bfab5f2b0993886b49252240d35055f323fd04f0f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:01:22Z), 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/RSA222300602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe496085be3c2731ef4f91a92d85ad43cd6099c7670c5285c2c4763d185848915. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:09:31Z), 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/RSA141313840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5a9be13834767f01266ec7eb5dc57bee5b142f40f7810d532e9bed35bb2797. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:59:08Z), 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/RSA222300284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d9e077dab133978cafb64418873a2599526a02f0f0ed670bc25ad872367af9. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/RSA222300288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0e58f67d1cd6ac2cad6571465b59aa96414f489f2535f7474af215c1cca93f. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:49:45Z), 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/RSA222300290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdcccaffbb404d1aee0758fd0badd155433d7b10f540f57a2911093a253e7e9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/RSA222300292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bfe209ffbf9c0993b2b321e50c8b0b9699e0b8d6b11bdcf7ea15a2fcde338d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/ATAJ11500399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01b69aa6edfa0d8fc96361802d10f75208e80a40f8905364ba042cc2a333516. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:13:02Z), 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/ATAJ11500398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d5556aa9fdc6bb33f406645413ebda8e35ccf79c4c20a5948e3d8e56485055. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ATAJ12302309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fe75a4b47c194ad3d077a32267203d8822318473065dd65afdc1162a813bde. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:08:30Z), 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/ATAJ12302310.