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 0xe2d440054a32bbfe4bed1a57eefc052a16c3c5d3417c68c1dcfc2134e4617bb9. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b66b1ae-d845-4527-9809-52b461664739.json and https://artists.proofprofile.net/proofs/artist/8b66b1ae-d845-4527-9809-52b461664739.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 0xf3f2a83ba9248e260050eb3ca6f590044277415b2142666955105dfba4ca2dcc. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/CANOO2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0398bf62f99870c22b1b9ea0ec7a5537a7ab46a13a8965f346a00ced5b5be964. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/CANOO2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeda7ac90e86c54e6e6a064c2bc8d8dc4a6d88fe5d9e49e1f91b5f7f9d0eccbd. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/CANOO2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942cc5e3d7efd90f7c5ca858eeefca1e8659616b8c80066c1b161151619e65eb. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/CANOO2000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d3f867ef566932d47e3a36532c2549ae37b97ebc267ebcfc7b7d17249ed0fb. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/CANOO2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8310ca1329be80dc651d4f7a43ee144d4ac72fce2f398bba21a4e52c8d9a413d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CANOO2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d06540dc9d69387f5a20a997563886028aa1711dd8e45a0db9960c060cd8e50. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/CANOO2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4acaadcc381dc314c6a6e459beb78d6a22461df0099b9af743c272e7fbef7c5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CANOO2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb225166b3d07c0eb4f86d8ccbf5196aae2480f4730b1c305fed57cbe154164e7. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CANOO2000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3046638672ee3d116cf2d9c987c0d8fc1e4d0fb48efdab2b79fe20890bc96cf. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/CANOO2000029.
Nalligigakku (Because I Love Her) [English Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2a57bb447bbc3bca3af730b32331b0bef25d2cfcf814afa0c05b7981c1ebd7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US6QR2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2a57bb447bbc3bca3af730b32331b0bef25d2cfcf814afa0c05b7981c1ebd7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US6QR2200005.