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 0x5a1f64d4c520def17f7fc88cd165104ca3b03ff0f45dc0dcfb139c9bfa340a99. 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/6cdb8b64-47d9-47c5-b81a-baa4a9258553.json and https://artists.proofprofile.net/proofs/artist/6cdb8b64-47d9-47c5-b81a-baa4a9258553.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 0x490ba4effb219715e446ea8c5144081260c52739a45d7c3c9c59e77a14ef2168. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRGPA1400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2fdd858479b690d76946213cb62d2c043d33d4018eeee31f7a29d2f65173a7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRGPA1400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058520591e0280173ddbaad179de5cce2582b3b4bdf2d1adf9e541b4c90bb9b8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJX2453927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd47668e6a500ff7689b209536a383fb0bfa45cbf36f78777ab0e19a5ebf9b81. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXO8O2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8bb1754ac47ecf8bc14e2d9bf6fe590a83f5c644513ab802aea962f8b2a7e8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXO8O2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcdc9c9550a63e79ead6dfbffee52f8a14a4b5a39bbafd4acf96238afb44c9d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXO8O2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78058339e2a68711c98d21f4d3b11d0efe0312af7cc2829dc1d8ab8a66759987. 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/BXO8O2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da9508934e01d96ec63ab6104f430b5e83cc61c7365aa648214cc7fa6e48d88. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXO8O2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bf3271f573321e671f416673f03ab86791b3aab90445a239dbdf46cdf9c04c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCJBI2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe36868e63eec153b1de3c504f86e3b564b282a16ea8a65a5f79975e4bb8494c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXO8O2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff65af89229dbb37a13bb7c6aac3718b78117fb5d705a4e0f51ff654449f0e8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXO8O2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4431d25ac52104a88a201700a89ab3fd69ebc4a3f04707fc68ac9b50f9ebe88c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXO8O2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ebe017d2e1c13fe986e892f9201a4bbcbf0c066dbab987b1a36ac62d8b2d47. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXO8O2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f965c31922853922f0ab838046744562f089aa510a42778e2ee1f27cbb32a4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXO8O2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89d47061cd87b8ed25d68602cda7e1d01727dadc22fd9d328839dfaa55c758f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXJ0H1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570d873d11ec40b7fe7af2224f310097fbeb4a069fa5e77277f2424c9b4da81a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXO8O1900002.