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 0x4d7d8245cc1560fcc267e51b5ea848147e6ab584e11a5398e3aa95146230e5ce. 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/599d9765-b079-44b4-bf85-0af9381dc5e6.json and https://artists.proofprofile.net/proofs/artist/599d9765-b079-44b4-bf85-0af9381dc5e6.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 0xc9a5b8b7a696bc0a4e58b43863da0398ecb0f31aaf00bbe375bed247edafb362. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:01:35Z), 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/GBMA21976275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43339e8b3a88b93ae06c551978477ea72b6dd7064351517ef9175c5b26c5af69. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/GBLFP1960081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19639b07a1623e416958385993ff2af406446fcaefabf49e1b7ffa0d0d856c2a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GBLFP2009413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dcadd97c0624a8a3618486dfba7138742d27fca735cfdc173fbbdfac8079e9. 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/QZE9U2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59437147d79a5b86e83f406ff8af0c9fbbb809ca9ce0c1916620824ca0874a64. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:38:56Z), 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/GX53U2376441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702e3fa995a856ee214142d1ce817954608f92c1793148fb4c2eb04bdef445a6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GX53U2479858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc4873f89dc3d5dbf63ae063f366964c29818c905b6882f222438331bbdbe3b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GX53U2395215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacba9a9e9518a6193efc2686031c848f600e8d10440a8ff8c115c485a931641. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/UKXN22518375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe777ba905c61a561bee43d34c383d117c7b01c4e3776bbcd5dcdb6704bee64ee. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:27:28Z), 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/UKXN22594735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e177e7af8b321a2bb049cb08402cf0ba0e17b774e11693e31ffab47bd5ff2b4. 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/GBMA22594457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740113cc50bca91fb2427ecda2ecab96177d698f265e68f1c0206af68c82bfeb. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/GXHAF2542676.