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 0xc9b02bad6cce53197338b55feb856145011ee6b4bfa5d625840daf5742ccc903. 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/5a27a6b9-cda8-452c-9106-a20a46bff12a.json and https://artists.proofprofile.net/proofs/artist/5a27a6b9-cda8-452c-9106-a20a46bff12a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
君と約束した優しいあの場所まで
三枝夕夏 IN db 1st ～君と約束した優しいあの場所まで～
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 0x4da71c94602200d5c27f962c3a432977214ee5c5601f7536ed2aa8f83b698f4d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:06:21Z), 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/JPF500303937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67691e379619d0f3eb4f7dc9677653a7e93ac799f3989a56063beea03ecfb5f1. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:01:15Z), 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/JPF500403948.
胸いっぱいのこの愛を 誰より君に
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91785c116c5510fee8d69a6e137c76352dec1c8f0f42cae5dbcc0ab919adc40e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/JPF500403968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fca1d2df8eaec1cc2ffd0262ffd7359ca25a4adcd15440329a64c4db6e570b7. 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/JPF500403973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5218d72ad9a34e81c94cb6b31ad2bf4b542f3a11f2e673725f2583cd44e5260a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:36:18Z), 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/JPF500403975.
飛び立てない私にあなたが翼をくれた
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1498814fec83bf4a24808282753cd64f4d3bb714a20ba6b03d83bc2d935e13bc. 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/JPF500503901.
ジューンブライド ～あなたしか見えない～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452e294976675881170da6ca6d6154bdcc6f58ce42e4db1d89df6babe705e260. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JPF500703906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661d22af454d95acd20a661de2436898ad6edd84656f36bfc1dc5692227b3927. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPF500703913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80fd01f57c2227b7a34a42091a328e4ddb9f6791b0f2ac362a99a43d82f6932. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/JPF500803902.
誰もがきっと誰かのサンタクロース
夏の終りにあなたへの手紙書きとめています
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7ec4ed574b617fd9cbfa275c9f44f2db829761f78eaf1b1c757efe8c77a3a5. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/JPF500903912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb196a7aed445fa5554697006938288241404435e44edd294ec41f225fa65aa. 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/JPF500903927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfc3532b72535602c087782a4ac90e6792a1aaaf2ae4d24fc3f98aee8028f2c. 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/JPF500903928.