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 0x67e65fc03b970a5c5f76f63b3530f7e308bbf816a5e7b88919dd8b368b7bd613. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcae756e-f7e3-4ca2-8c60-18054f3c1867.json and https://artists.proofprofile.net/proofs/artist/bcae756e-f7e3-4ca2-8c60-18054f3c1867.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
讃美歌～心を穏やかにしてくれる安らぎのハーモニー～
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 0x4cd1d2f69bdef900f6bfa9a5c2e76812a8076aec12765336dfc6103af5c89b8b. 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/JPKI09413500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868c184e79fb18b08fc6c821d1b70f67003314fa815645b701c1323d9e478e6e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPKI09413490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585bffacd56e776d50d036bb69de02e154ba3780eb4e112dc7225d93ca5b789f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPKI09413530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b3a663a187fcc4691da8203f9f1d435226e22380c56d7cbb3839e7c24151ac. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPKI09413580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb1eac7d864540b2c73f229ff3b977afe300e960f0eed49a664f537f1023ff5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPKI09413600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec98a8b941c64f5e71909f9091d74e6b1cd83b9cd106d0b991f53b371b6a753e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPKI09413520.
キリストにはかえられません(讃美歌第2編 第195番)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4a97bd8c9322115af159ded5c08978594800aee2ae86fe977e0bed81ffd5ee. 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/JPKI09413650.
まぼろしのかげをおいて(讃美歌 第510番)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564f484036d6014098590b23741be273afdaea1b3d4625dc630345bb1853de6e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPKI09413640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec4b9f8f96a1f01a0a86d25e15e440600344f5c5bd8811d121659b4211e15a5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPKI09413660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33c0e17871964eb7b9905fe70fb35bcf5ccfb3c0b8a4c8a9aab70c81ab5e1ee. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPKI09413670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687e31f1e04932f8275d2a1cb3aaa6dfa67d86a616cfd2a509d3ce1f0b54f2cc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPKI09322710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1b393cb018ba3ed7efd8c8231b30548e95a738009b4e4079bd18754d9bde00. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPKI09322720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd000a4df7baff6382f5185aaf40f8ccbe704a83aa23dec2c4b98c34f25268864. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPKI09322740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb6676a258f962100505b8d2cc872519ca87ae50d524257e792adbee16d1e0e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:47:09Z), 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/JPKI09413680.
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
みたまなるきよきかみ(讃美歌第500番)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059619424dc77c368c1615f757a05772a9a7bb3c298f14aca08ad0692a4096ce. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/JPKI09413510.
うたごえたからかに(讃美歌2編 第25番)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9a8d1d826cb956bd0be6dce67153fc0b0c37696fe3d08b80980ed35cc18f52. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/JPKI09413550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea85d5d1a2d856a2535896e11a7fa94d95f5857490ca5e5cd208aad7835a47c0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPKI09451520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e41b789ad2886513b9ce3fef3e94147540653d06875b2fe9aff3b65ae85d3d9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPKI09413590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d75064ffdc41752547e8c0b2a9f3ad2ed4bc6a4787aca40c5dc53cea0282ae. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/JPKI09413560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c8a950653f6d87b6e66d71e683ed1402540667cd174683d6a6a8669cc44313. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JPKI09413610.
すべてのもの統らすかみよ(讃美歌2編 第59番)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107f465b7434eb4ff281bd652e71250bee23136582e34e2f7e011904ed32ab52. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/JPKI09413540.
やすかれ、わがこころよ(讃美歌 第298番)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0395243df5928d65aa96e300c62a0fd2464b039b2fabf5805d46ecc41c0fa4e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/JPKI09413630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca0b6225cbc49427c3c12aacfb4b10a2e401024f2715dc9ca93cf7e1eddabf2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/JPKI09413620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d704c2d4987262a63b5d8674a6bc44d454a8d410f63c77d0713478097cfa4a. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/JPKI09322730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc24453f7e0d97e1b64e34ab29c38c5dec7b15b08bcf290932c17e9180ba2449. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JPKI09322750.
讃美歌・クリスマス・キャロル～心を穏やかにしてくれる安らぎのハーモニー～