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 0x0a176c71c0a2b98aa5babe0adb6baaa9c75309c5f06a6d7e81698077a2605fd4. 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/dace86f2-9e6b-4bc5-9f09-8816d3065524.json and https://artists.proofprofile.net/proofs/artist/dace86f2-9e6b-4bc5-9f09-8816d3065524.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 0xa3d01143c888fb86b3b32bf7725d3df1cb7e54dc86cd90524d9e974d4f14d6b5. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ES75E2202220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192f3d2c4570690772038646d8fc2bf4c100125c1966a022533e106eb77c4017. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZGLS2308531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3420a94ffe2c482e0edbe59f7759e70baf02ad68ec8ee82d4eb736a35393fdb7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:47:59Z), 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/QZNJV2371797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2064d8be979a1829bbc4b28475176fb3a93d47ca6112eb42a00e024b9113b8a5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNJW2309106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf64adda83d93764c5635363fdb74b2e594ecabbe5a7ff95ee3805056f2e57f9. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZNJW2358676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f1789dc9913a93d33b593e72b526641b98a27b86414b28cfec2e61be280d64. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNJX2393756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6154da3224e737d8b8a703b3b890888f2a5df7aab32089516feaf9c6fa3dbdce. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/AEA2L2328144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0147a4b72da0bce6ff49b5b6df28e1f4ceafc59d279f5871b37acdf0c0c867. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZ5AB2452990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ed1f958fb9f9c54d02194e916781890755ef4866578b7629b93490d4391c6c. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZMEM2420504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efca35e964f4b778c5a1d5579f0bca1c9beb198a11fda194e11a3b95b8421d4. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZXLZ2400790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf122a35bdc6d10c0403673484ea328bc8cccc6bb6d524af7cd9b1103fc8e08e. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZXLZ2402292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d351a72ef913c890a58ba556a1872349537eada5af7b7af73e6f4a23e39b9d1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZXLZ2500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0500ba17000b9e5acf6dd15928302919e024f167ba65d847a2255d1950eb98d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZXLZ2500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38eec61b75f0e47fab15c74c7065c11ae25070cb570e6e0b44ccf554957f6fac. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QMDA62583409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e34a5c945d4509731bd56f5c576946f037d5a4e8704738c00c58e56672534ed. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QMFME2542758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a20526188601353243bd09658ce1f7ee8ef9a171f90fadd648ce31e092fb230. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMFME2542803.