thumb|right|Marble portrait herm identified by an inscription as Aspasia, possibly copied from her grave. Aspasia (after 428 BC) was a metic woman who lived in Classical Athens. Born in Miletus, she m
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 0x3d0b2713980b185fac1acd6eecc882c62da5d6636dd4a225c55a20de43886cfc. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/537c1063-1f9f-4e71-b578-b152d367f8aa.json and https://artists.proofprofile.net/proofs/artist/537c1063-1f9f-4e71-b578-b152d367f8aa.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 0xe0c0fce0bb7d3bc28eb0f93cb6118aed58e71606be40e0f18b82bfd1b59806c0. 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/GBSMU3081999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f8df9025e0a6863a4d40598cde54e8597925238231da27fa058c023e72cc24. 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/GBSMU3082001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d7c54bb682f35cb52a9ec7f9d19ce4e03afca5a6b47d35fb7e37bb29f13e0c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBSMU3082005.
La rueda que sigue girando después de la catástrofe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c43800424ec4888b1fd862c7b530843b818e4dbd27c96731e5193bc93029a2e. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/GBSMU3082007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493b0ca5aae2684cc772c55d21c9afe76681548e2543b9f13c766e4bd4480c32. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBSMU3082115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd332da0093aa25e297afc887423eb8d877529813603d1436f96206c79cf8b4d. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:17:24Z), 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/GBSMU7773447.