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 0xbd669c8dc048c419258a62fade7a88b6f7503a7762689364a7ea46346b83c618. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46d614aa-0001-4606-9780-73adcd793eb0.json and https://artists.proofprofile.net/proofs/artist/46d614aa-0001-4606-9780-73adcd793eb0.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 0x7719cc0a7bfb832dc9a208ee6fdb9ae0dd6761840fbd346a500691d28701f660. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPTO09601780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99062cf94687c557a3ebfc54c658206fca7b1b7f40eeda9967c9c6706fb8b7f9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPTO09601840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7de16b327db4f1b52c94c611873ae484c969c4dac08fd277eb3ef2960e84a6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:20:27Z), 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/JPE400900382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885275d7650a27405adafc45a3d0653248281218ddebcfd3961c9303519de42a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:02:14Z), 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/JPE400900528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8e1d32dea2316fec8f77d9b0345c3daf3f94677f199607ca07fa5274f64154. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:40:39Z), 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/JPE400900381.
木曽は山の中(リメイク・ヴァージョン)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46da1569b418167853cc5a7e9da8c703c1c7f91691cf5b8ed8f400b4bd504c49. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:44:20Z), 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/JPE400900532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528f2d8958dfdd47a79b958034399368c912491f2ebe4b9aa8abed5b887b6efd. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:35:43Z), 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/JPE401000129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e8016dd890ed8ad52045b69fa1f2f734190b961e24d7ad566d8375c399f0b5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPVI01426320.