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 0xe247eb6e623258cdcfe2f5be3a63fd3217e4b2890efb125b791564988fef1c6c. 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/e6a4eeff-e37a-4e1e-bb94-7bb21c04c260.json and https://artists.proofprofile.net/proofs/artist/e6a4eeff-e37a-4e1e-bb94-7bb21c04c260.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 0x49a37e7ace170455e2f8d110fb2a0d669497cfdd459e6bd7eb76a58d88915e3a. 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/JPTO09253720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977e416221867333ac397d0c5829cc4402b1419759ecf90e4bb2d6ee985b9672. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/JPTO09253670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a37e7ace170455e2f8d110fb2a0d669497cfdd459e6bd7eb76a58d88915e3a. 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/JPTO09253720.
財津和夫ベスト/サボテンの花<"ひとつ屋根の下"より>
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7ef05c25ba2be27b3ee2fda75fbffdcb1d8552212fa53ebe4dc17914c8a9d9. 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/JPVI09821800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a43858af7d38144f9a4d06613ac028bbb34f329ef4e96a9bf0b42e4d78a6c71. 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/JPVI09819610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190994474485f24f218bd3bc719499d04df2dbea1ad538843b3f00da08f14bdd. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/JPVI09924370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629a92362cd32aae028ab7f40fa1e4a9cc6eb8be101634c8667e9dec0462559a. 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/JPVI00432750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139a160d69abdbf3f6a1429b259bf77bc92b052225cb342490a841ea0a0b1e1a. 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/JPVI00432760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c4fec10c616246c1e0fb10eb6dedd809f50db450f7439c52bf2b4e0ff8dc48. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/JPVI00432770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678d3025f51a2d6cd50209c56968892c3d449dce9b569776112a9a755671ce7f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/JPVI00432780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce88cc203938abb4a2ffa60cca7a0f20eeba0fe528491eff8c56fb879b822efe. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/JPVI00432810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b705146d79db3675187efcc6318d85502db28536690ccc81a37a46394e2f9c7. 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/JPVI00432850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabc4f59956f0cecfb0d37c72e9dcf4fb01a90d935658f23577c092509b4bb1a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPVI00936500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04108f91385e378ffc37967d676a8c7d7206f35567e5087b72eee49e631aca1. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/JPVI00936510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0a4575772ac7cc6010988d66f0ff9d83ad6a2996b6c579a6b440525ee0fa2a. 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/JPVI00936550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d5f521519df20251f9e5fe97983089df1fae9f13d1ccaf189dfdbbe1b31cac. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/JPPO02200063.
ユーミン乾杯!!～松任谷由実50周年記念コラボベストアルバム～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0c283a68a3491e181115bcd0be9af67f5e3a582f02dcf44de2ddda44fccf54. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPPO02304191.