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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4894f17c1606ee0f4d8ef2247e6b222431662b63cb589724470643a20e6978. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be103006-62a2-4115-a678-2f851c1e20b0.json and https://artists.proofprofile.net/proofs/artist/be103006-62a2-4115-a678-2f851c1e20b0.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978a4b44282a0437041c491e34f6f87047ea868a00510f03c8e871dc1895df74. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/JPE561201231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c2a87634784d486915cc097cc0392b4d1c4d7e9e1bddd53e0b70a9d7feb37b. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/JPE561201232.
I Nyaned for Hours ( ' w')‼ [feat. 初音ミク]
I Nyaned for Hours ( ' w'​)​‼ [feat. 初音ミク] [Extended Mix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43357847fe4e109c20605cbb087dc336c415d7cf3da8e6b1a5f1d82f4a5bcf05. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/USE831576972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fee7cbcc7e4607d0c7e3d3e9904b23014cce53950258d761ccbad25c68b1db. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/JPE561703201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94396b038852f13e8544922b0d9446470a46aeee843f89d6c0ab7c84b09c90c. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/JPE561703202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf49b762899ee53e0178d5d6e01a143cdde503dd22512523b0a3d1d24b832f3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/JPE561703208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d46488c413c5145b733c1de6c29aa29c4ac4adf7e6ce5982ae7778680e52caf. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/JPE561805235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd594827ba78e989c3c0b9a1d459b6d0243d34f365486fa9511fdba2fefad97. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:46:43Z), 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/JP92Q2200477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eca11b13c4036fe50f17e50e6cbfc699298fe4e00d0f2847bbd1aa942406074. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:27:58Z), 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/JP92Q2200976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea066dfce8985ad4a47e220b7a89280347e106b271c69af36ccb949210bc602. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JP92Q2200977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9d75a45e4cca43397f01242dd564133e241e144c272e8de6b93d9bb7db9f1f. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/JP92Q2501822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318479562f30aa8489267c28bfd642b0fb5a685c9ef7ea4110c89648bd67082b. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/JP92Q2501823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15720ef20f87fe933fed4a5d315e97ac47fe1874406917e4bc730767a25a7646. 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/JP92Q2501824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdf50c08fc8d4bf1901ed5d1fdfa592522df5dee8b2940419ddcaa43d299c79. 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/JP92Q2501825.
さりげなく消えては浮かぶ (feat. 小春六花)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e233ba599060d9838d659ac486be2aa009b495ec09d0b193f899c0d5e0936f. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:02:45Z), 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/JP92Q2501826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cabe1b7a123ee84032608334396516fa4223409342ce4b6b74ed0cdd4d94cc8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/JP92Q2501827.