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 0xa662088a06e0e8eb9a8204ee4074a22f28a9dd7e189773a1b3f299f6cb4f23a2. 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/00e19ab4-8dc3-4f44-a115-17047bfbcb1d.json and https://artists.proofprofile.net/proofs/artist/00e19ab4-8dc3-4f44-a115-17047bfbcb1d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Light Infantry - Original Soundtrack (ロングバージョン)
Light Infantry - Original Soundtrack (Long Ver.)
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 0x2d0cd76ec804aab6aec0330a4fbc1a22f3d2102fed8bb370a1c4b9dd073aa006. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCJPW2303527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b5cb123bf905cb2417ff05f3f81eed62777f6c94c09bd3fa6f02358f944674. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCJPW2303533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911e2dd5499aa6f31aacfe4117d76590fa0993f62e6a753b020bb757cf97bdfe. 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/TCJPW2303539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1bc04b017a45fa2f04948e7902b623f3bf6efa99cbb503c783fab3ec1d3160. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCJPW2303541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0cd76ec804aab6aec0330a4fbc1a22f3d2102fed8bb370a1c4b9dd073aa006. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPW2303527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b5cb123bf905cb2417ff05f3f81eed62777f6c94c09bd3fa6f02358f944674. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCJPW2303533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911e2dd5499aa6f31aacfe4117d76590fa0993f62e6a753b020bb757cf97bdfe. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/TCJPW2303539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1bc04b017a45fa2f04948e7902b623f3bf6efa99cbb503c783fab3ec1d3160. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/TCJPW2303541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc55500f10a3a75fc50059c537c177eb0543ed68e500f1728eeb3a94a70139a. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/TCJPZ2417005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc55500f10a3a75fc50059c537c177eb0543ed68e500f1728eeb3a94a70139a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCJPZ2417005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822517b7c297d1934b2abb3a256ab4754dac3f5a953c7c0ef2a3b07f1639660b. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/TCJPJ2592027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41265450ce5531567f28bcd5a70cd2b1552e7ed42c96144952059e1d030000b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCJPE2506336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41265450ce5531567f28bcd5a70cd2b1552e7ed42c96144952059e1d030000b. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/TCJPE2506336.