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 0x5a9aee2ec88960315796f537d69c8dc13fda6fa870e25ee168fe934b86cffd61. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df13b82c-403b-4a3c-955c-5d81ae0d5a06.json and https://artists.proofprofile.net/proofs/artist/df13b82c-403b-4a3c-955c-5d81ae0d5a06.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 0x789241ee83ddd590c9781b907b2c1c00ae60ca0409f3ef34e48ec126e17e8163. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:30:37Z), 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/DEPI82303988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2aaa382f7ac1f1131cfc24b5415f29e158e52289df2b6117f4feb9f27d623b9. 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/QM6N22549353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf673b5c867c1288776894852ba1b12652ee05bfa0e0d07fdead0d5bdd0a97aac. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/DEPI82310451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc184ea6af2e81c135f77d2d858736f4a206626cf1f975612c967adc6a3f8ca8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:34:37Z), 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/DEPI82325505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2076d6ef19039a4fb1811d49b772bbd6ba76bcdba09270c6890431c679e1ee. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:17:41Z), 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/DEPI82500878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b2f25233e885b50ca1181035bba03646a660e9abfd9588b439aa5508532b14. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QM6N22507785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db566b2abf2d486d3ad5de0752237cebb1a6484e1544d3d06216eeefc0cb5c1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEPI82513091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0815723ee43b3da6f538ea9fbb9e9d65a6fbc00f8bb890805475f16ad8faae. 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/DEPI82513145.