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 0xec77160d16812af998667c5178a3f6ec0b4d7ce2b347a4df5419e21f5da37e6f. 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/d7fb1251-f63d-4374-af7c-de74d5824f78.json and https://artists.proofprofile.net/proofs/artist/d7fb1251-f63d-4374-af7c-de74d5824f78.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 0x32b847e3a37d49b950a17f9d8429f770cff0fee25eb4bdfb59d2af4fa358ff82. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JPV501800247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26b7b6a2e65d47a2051095dcd8460e362fa1d6d3fa3a636a51282be870b789e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPV501800248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff08bbcf9b3990171f77db62411f73ddb9f5d35303fd98aa7adca4815d86d17. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/JPV501800249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9b020c381b1b593af7b897847a490c6a9ea864120921537e317fe5d51ce5c4. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:41:24Z), 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/JPV501800257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad0bcf50861b9f508ad46830abd7b4a35dc3a8629fe3cf0aa306246938d2734. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCJPJ1916338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ccde91e87417f50586dc6d6216fcbe9cccc78f9602e3560c9cf0c9cbe1309e. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:26:13Z), 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/JPQ631900152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2a14040e1cba2ba0733e552fa67dd3fa0aa281cb7051bb8b74039ff04fcc94. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/JPQ631900153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4454ca3e41bcef292ac5dd7841db7f26936eae903f2e822014dcfb7d8c59b64a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPQ631900155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db0a4d4c0ee575350e4838f1637a5c1e0041b9a857184c5eed4ac5e00807cf1. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/JPQ631900157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db0a4d4c0ee575350e4838f1637a5c1e0041b9a857184c5eed4ac5e00807cf1. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/JPQ631900157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f4e6c5df5c4c06ee494ae72159ce1e05cd1164aa3980b0b36d119c53cbd471. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:43:57Z), 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/JPG102201577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebfb32036cfce4977b8c1ffd3644ade25a5cc978cbda5c2f09404054b638e0b. 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/JPG102201578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefce5d0d8b6dd97eb4fbd59ffbf2baad4ac9aa8b6ccaa34a8d9d2890e830e33e. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/JPG102201583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d84bc41133eafdb451612b3a8e4ba78c95d0bde81b3d068754d8c76907fa22. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:20:35Z), 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/JPG102201588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e5777be5bc5efae97733bfa463fb087c61b11b00aae210fb86655cc012178d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCJPC2432012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2a5d587e70d71b930c97c6248e06216013409279b592d2cfa522186802fb4b. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCJPC2432431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171e6becc4304fcad61681707e7f13a7a611f798ae6033cf265156faf3ef4ab5. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:02:41Z), 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/TCJPC2432013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bedfc87ff8415b953f3985fc1d1491087031d023c6694c4c2da61e5e99b5217. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/TCJPC2432017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd81ccf94ebb9694d07ed0a0f4ef3e5a1ac9168543ee9589a19e1bce32e3dcb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCJPC2432019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d55d906d5c3d58667650bc496342a1bdb5f570334913c47a79f4157dd9d4919. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:40:47Z), 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/TCJPC2432020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366ff875f0ac24cded95533f0c93c8f46d5dc505fe4b3f8c62770d748285990d. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCJPC2432021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917cb6de118a1c8ca0fe52ac5dfdfc97b95125ac9e281f6b6a993e1d536188f1. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/TCJPC2432022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54cd3c622b785a50aae8243370844d08826229f45a67be2665d2f5fdb656f4f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:33:59Z), 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/TCJPC2432425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2c3388c922f7da2c5748c745a745fcde9daec2469ef774aa41eb15526fd4f1. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/TCJPC2432428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025f5ea9de0d7465e448364e81f8b31254101b031002497e988deda65bfa1868. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCJPC2432434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d84a7548362d8e8c89326803087476fea2f10d63f79c8ecfdb273cbc3af2fe. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCJPC2432435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8d217f2cf46f58fb7b0d45a00ae223e4ca9f7d51662523f1b6dbb58f737888. 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/TCJPC2432436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d3ab74da9cc87544d14cd0391e910b04022c9ed2a7db90dfbe5fc69bad1e49. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCJPC2432439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0bcc0f4a743de006735cb9b1bf4ce12b481f87225df1222de7055530377484. 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/TCJPC2432443.
いつか終わる恋のために (feat. 榊原香保里)