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 0xbcd45a48d80f485e96bc88994692f39c81a3bac82a297a0d9be2ddf8627ed36c. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c54d976-dc5b-4122-9335-cdc63555a624.json and https://artists.proofprofile.net/proofs/artist/7c54d976-dc5b-4122-9335-cdc63555a624.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 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 0x78673af45ad44a9856fa3684604a9511ba8ff8b5f95049f1cfda11693b8134ff. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QZEKE1928035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bec7c38fbdd1ba7fa7120c95bf1a0ddebc4781a1d7c750fca7c53882cdbb1db. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/KRA382207278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34605ecbb47bd5cd449dc2b0e14200efa81ce4c999befb4986a501fc1026072. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QM7282445143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e212c133b602ef834c51abd42401eed806100779a5e0fa9257ff1c6b03872b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QMFME2462936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d9e1ef7827108756f675bb846ea3679900e1052d4caefaaec0ab04df5cc805. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QM4TW2534446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3d9e035a7f77871b5d34ac1adade8c877349ead472820f89d32bc9d61a5eb7. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QM4TW2534447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374302bf5394e1fe02a284715a37882c868897e77af5a18fe55643d2b0919603. 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/QM4TW2534449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad780cb8ba373f28e077a570258ff0a5c2ebbf50a2f282a6cd0e79d36248cf20. 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/KSA002501166.
여왕의 집 (Original Television Soundtrack) Pt.3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8fff75eb0509371ad71997f8ffa8b4b1a1cc4d17769a7e179ab6ae25102b6f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZEKE2010346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9998a3446d5d6a5267faa6160458c15de83b37b3c84d54128829a72f2a2ce35. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/KRB471701906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba92c7340d670ee389e7a6f1c7b22b5b498835e22783920d727f236045ef2538. 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/KRMIM2242378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8caabfbdae790ec662aa7ac65c1e6b56ed86a4e0b7a57e0c3e54c863def839. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/KRMIM2121014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2380d1b9e12c4805b8c1af9da573c0783fb1bcb92a701c674fb9cf83a97e959c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/KRE022400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82e78b09205c44ed3207c851d797417aefc966f1042076d0013230b4e40f1a7. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/KRZ291805895.