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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adb152b3e5a889c9ff3208e0234b633298425a8429a381bfdf66c53db12f33e. 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/04b04c46-6d3c-4712-9d45-a304cd880b03.json and https://artists.proofprofile.net/proofs/artist/04b04c46-6d3c-4712-9d45-a304cd880b03.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7712384b606dd0122453aa9d2f761f3b1c14eee57c9277469aca11350051abe0. 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/JPCO01831340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4018fd3cc6f3a99a878f58ec0b58c39dbcb34551fd27cdbdac6c340a677844. 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/JPCO02017160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfb673e6f523e6151416f48ef5bc8b43e0a069d4326a7de17d788535a6f2d1a. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/JPCO02017940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa765235658f848571eda438feded587e5f1dde62e60151f65910a0bbc4aeb79e. 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/JPCO02017950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4018fd3cc6f3a99a878f58ec0b58c39dbcb34551fd27cdbdac6c340a677844. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPCO02017160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2577ca2dcab26248075bd85b6b07627b38685d8bea43783e49878c9e113bc3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPCO02017970.
Touch Me / Speechless / Friend with Benefits (Acoustic Guitar Ver.)
タッチミー / スピーチレス / フレンド (Acoustic Guitar Ver.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947b2de456c632e83348c21cc2d6a3819bab0644f0f5f22e5d19dffec5b5ff79. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/JPCO02112820.
pool mood / tasty tasks / 息を吸う ここで吸う 生きてく
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218d820a4329d29a7fb9a0d12290935e18806b6187b3bbb178b41dae9bbd7571. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/JPCO02122260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cd20e2cf332f25eb4a9ec6b515efedfc2a4ccf8d93d0d8e7a43b59ff0e18d4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPCO02124010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea2a0d77991b3b264e3ff206381844aaae249474bc72b87a7d7d9f0dd4f46c1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPCO02124050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947b2de456c632e83348c21cc2d6a3819bab0644f0f5f22e5d19dffec5b5ff79. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/JPCO02112820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218d820a4329d29a7fb9a0d12290935e18806b6187b3bbb178b41dae9bbd7571. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JPCO02122260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cd20e2cf332f25eb4a9ec6b515efedfc2a4ccf8d93d0d8e7a43b59ff0e18d4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPCO02124010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42971d4e3b072e33bf7892cef725261ceef8c874dfd9e60cd8aafad0a91c778. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/JPCO02129140.
スカイツリー / マスカラ / 息を吸う ここで吸う 生きてく (Acoustic Guitar Ver.)
Skytree / Mascara / Beautiful Day (Acoustic Guitar Ver.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef85388cc92a89909fbf6b3e5462fea765c8ebba1fee66978a00b330bde8d657. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/JPCO02220250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef85388cc92a89909fbf6b3e5462fea765c8ebba1fee66978a00b330bde8d657. 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/JPCO02220250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f26117bd278ebc726096cd1923bac79ca078bf55d46f885ee540508bc60941. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/JPCO02227730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad86e48fd75d065d44dd1c75570550efbd93e50f21c86fe9f5deb6dbeb95f1e. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/JPCO02233000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21049eba42822a8c7749203c81e492cc527c5f6e72ca657dd5c0bd7b27b38f0b. 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/JPCO02320850.
SUMMER TUNE / sun shade / スパイスガール / 会いたいな今夜 (Acoustic Guitar Ver.)
Summer Tune / Sun Shade / Spice Girl / An Easy Girl (Acoustic Guitar Ver.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e4688064464c5898798f5e4e216f084f11d44ce08ba5ba0b7f98d4fc6a470d. 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/JPCO02337320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e4688064464c5898798f5e4e216f084f11d44ce08ba5ba0b7f98d4fc6a470d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPCO02337320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e19df3d3250361fb20fcd9d51e091b4e39ff43dfc390344fd4fac5c38adab0. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/JPCO02401520.
routine life／morning walk／セルフハグ・ビッグラヴ (Acoustic Guitar Ver.)
Routine Life / Morning Walk / Selfhug Biglove (Acoustic Guitar Ver.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ff3cfd27dc894dfce537c91bc6dfc78bfaaf4dd4eb321cc0385d4cdcf77c0b. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/JPCO02514100.