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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd26ac578294c2de9ae10c167025b6990d0e76642e2707ef6aaf76f6b3dd921f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39705cfa-f7e5-4fa5-a046-1c97175705dd.json and https://artists.proofprofile.net/proofs/artist/39705cfa-f7e5-4fa5-a046-1c97175705dd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
J'irai mourir dans les Carpates (Bande originale du film)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d22c2f7757b77d784b09d3ff00975a9aff1eda58323a6890d2cf852f05c2ee5. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR9W12117703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06d3e4e4ccfd4071bc8482fdc20bab6df817e0300f950bc85944b6674e32e95. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR9W12219749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab13c2b08513274cf756e7d1a466e9ab5fe0dd00503879d2cc1e47a84ab3f39. 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/FR9W12323412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36f83af5b4eebbd6ecb8b0b6b81603af2f910250b2eabc8a8b3ef2fcbd30699. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/FR9W12323413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d22c2f7757b77d784b09d3ff00975a9aff1eda58323a6890d2cf852f05c2ee5. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/FR9W12117703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283d60061ff41468628e81457ffcf48a839331b8e81d10ac255ac96f9f4388f5. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR9W12321551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1910609b326c0140545f292dcb7afc24e6e22ecb71e7b27e5d8bf9eaadd8bd0f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR9W12450748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aabd06923ba50eb516d0d0e0c0ac2861c0e7a484537c9393e79d8eacc2b8d74. 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/FR9W12463197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598f95883189b8f5b5921d97417ceb2bfad0d617c0dd78af545c016dad9f0451. 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/FR9W12510885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163d881f54f7818288bb7a299d9277bd6463e254911566f99af5bc8975b7c358. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/FR9W12510886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb0a0553f73d606eb12066b90a048c9bdf34b0f72e2e210cf474add612cfb48. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/FR9W12428990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1910609b326c0140545f292dcb7afc24e6e22ecb71e7b27e5d8bf9eaadd8bd0f. 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/FR9W12450748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c1c4eb5d436b8321a3cbaa36d5b8506a3cec5c564c5b8f6d38a6d3869b2982. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2B1617527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ad40c295ac150e3b518a1d077df4c229d64902440dba6ec603515f662c2d64. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USER82006204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b3ea5dbd0d1e7a5453f0bf34fcae2589adcc7e51c87ff65eb3848b97f8a492. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR2FD2300015.