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 0x39bed6cc3eba2fbf98cd5268235ff09af9ac6713c905d46e5d2ca12bdf75a5f8. 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/5781ed06-8d19-40e8-aa91-c57ee288cd0e.json and https://artists.proofprofile.net/proofs/artist/5781ed06-8d19-40e8-aa91-c57ee288cd0e.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 0xec1fa8167bc6d7eb9531b78544a3270e313d7334cfe182c837e7bc39377a79cd. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/TCJPJ1975177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9e92aa8627a0c3532c2898f2e3d7a789e0f8932292885809fd8c6f77562492. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCJPJ1975181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c688ebda879c2ebb9f583fcdbd96b9d6a30b249968c047367446150ae68a05. 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/TCJPJ1975185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6545bf52f90ff17d8fd082ff5e00fb28944e0d7ffd67422152df25f511c8c563. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/TCJPJ1975196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65fa11dcc122a9dca0ee3bb4eed6ca458b2cc94b9fa7dc1d5056d068894d971. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/TCJPJ1975205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227ca1fac1b27e1aabf38d1afd97263e0531ccd9a2f412b977acd53090c21a91. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCJPL2087529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeab9396239b72d9929afa9b1dd9afc1219637d1d788c9b6ea39ad59501a44ec. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCJPL2087534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cba6de78715abbde84a00c4b61f4a02d71a1f61fb2afe0357eb3f541122ab9. 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/TCJPL2087539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3350762efbc79948b3f731b53367c011730022eb52de04909d634b04dfc5faff. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/TCJPL2087542.
災禍論 / 「終わりの未来」 (Orchestra Instrumental Ver. - Remix)
Saikaron / "Owarinomirai" (Orchestra Instrumental Ver. - Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c129c0b9a0c83afc4cefb961ccc5aeeee4494e0e48892ca23efc28af9c4869. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCJPT2291053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0822506779a47637a72d019322c5b90dd310e30757eb7887d93b061bd6cb6302. 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/TCJPT2291043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c129c0b9a0c83afc4cefb961ccc5aeeee4494e0e48892ca23efc28af9c4869. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCJPT2291053.