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 0xcc233dfdee244a3c89b843b54ea9366ef9ee96e17ac90116d84f1cff2c3cc968. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e532477-aba0-4e47-993a-febb2f2c84de.json and https://artists.proofprofile.net/proofs/artist/1e532477-aba0-4e47-993a-febb2f2c84de.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Durme, Durme ijiko de madre (Arr. for 2 Voices & Chamber Ensemble by Victoria Couper, Ignacio Lusardi Monteverde & Lux Musicae London)
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 0xe48e448c0cb86d8237af81f87f982d8df1f0e5f4b49d1c5836cdcee5537fdcf3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBSLT2415701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdd8e8a4c5330770d456f72f62feddc9982f9ca9ec053d4a7e9ccbac1943ffb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBSLT2415703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03de4e1cc166927053e32319fd806b1b1ce12885454273632363bd0af982a450. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GBSLT2415702.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Tres morillas m'enamoran en Jaén (Arr. for 3 Voices & Chamber Ensemble by Victoria Couper, Konstantinos Glynos, Ignacio Lusardi Monteverde & Lux Musicae London)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da9c21e80ecea6ac0a2b3e33354dc277d219568d24a35fd2d45c663372a280e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBSLT2415704.
A la una yo naci (Arr. for 2 Voices & Chamber Ensemble by Victoria Couper, Ignacio Lusardi Monteverde & Lux Musicae London)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7864c4c61f35e08d6d85dbd7f5d3bbffbff235360e6a7697ccd69f8ed07b18df. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBSLT2415705.