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 0x51e775d9cf3f1c228bc503ee686230ca893dbb553941878d34eb886555c66257. 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/5b463d96-a419-4bd8-a243-ec7afa877fe6.json and https://artists.proofprofile.net/proofs/artist/5b463d96-a419-4bd8-a243-ec7afa877fe6.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 0xc863fc46be0f8c7f4c38df6957c9fec989da57caed8f52a5be3d5ce76cbd69e2. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:05:20Z), 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/QM4DW1664153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51f5a1e37d993d9b913cf880647c13130f5c257d3a301062a8d3d9e4fd6ffed. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QM4DW1711337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6fdd6e53b589ff5fc3b54217bd3748d89f743c91aa97e8dd9be9d2ad8589ae. 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/QM4DW1711340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652055a85d8921424710df578a97f276a592cd18942138aeb7fbb83e9ba821e6. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:29:43Z), 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/QM4DW1711344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7ea2e715b86ca6b911c7a6a0ce60e09f49b2ebe412747c709376cdcd5a9ed5. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/UST8K1735334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a342b29b67e48140a3f0691e66ccc90f74b7c4965edab11df0f5f28609067ac. 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/QZDA71856509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63db532e900a92f9a2177623ccc740282535c44884dc4191cd051cca9fb82dc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA81847336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5056e54ca445573d9a93160ae1e70defa56e6e5918f096ffe0817742a2ed99. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA81847344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2b84509453693a9e6d6bbc170d9452b1d8d1fe2538255b8c7b3e06cf3f03d0. 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/QZDA81847345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd1411857c15de579773d68ed4ce75bc535a3dec1ffeebeba219b9d425baf25. 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/ITXDW1600473.