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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 0x645d4f4e800bf6f5454a87f31c9564f7b0c1a1afbeac81cf42958bd96c2c2177. 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/385603f9-334a-4159-b5fa-173918096da1.json and https://artists.proofprofile.net/proofs/artist/385603f9-334a-4159-b5fa-173918096da1.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 0x11351f0828275e1ed48c278d7aba2f8a76eef2f35beac65e47155dc3f9777dd0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FITFR1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7765e54e723d2cad5305f8421101f9eccc2a3713063498dc4f606420bf22dfc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPPO01905090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032198a32fdd6083e34c0cbab4827257ce34bb1a4e3a1ead7064a1625d266073. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPPO02000457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f8212efda34dac36b2cf835b562d9e2f0238e8a4be65b761b5bbb8a9150cfc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPPO01905131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c0e85e0654b4e510c5e77f1c6d2de9c3c208e9ec62a8e84c8b606651fd4d68. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPPO02000458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cf23a71af14efc4e602976ebadd661cd1044390ee3b951c8477bea52d7eeeb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPPO02000459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b5b2defccd2010c0c8e74a4ecfb26e9b77a423311695f68c905e8741d81b3f. 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/JPPO02000461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5880271e1a01570fb3bb80d68d7b114270ac54502296b0c7cd85086aa4a9330f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPPO02000462.
Work Hard, Love Hard - feat. EXILE ATSUSHI
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747d2a16e4414b1f51a59f753dd5610d9896e7b2e0ab14d23bf565b173043efd. 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/JPX522100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a9020174e51daefb24c2efbffaecc0fabcfa073e68cfb16c16a4c2486e50e2. 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/JPX522100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7486b05ba5b94d5faa7ba92b372d6f7c561aa4c03c5b91532aedcb87a8f6f0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPU901802043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0560e60dfe5550d12d5bcae52b161d80dbf298dcd49b44595eda4a5b701bfea9. 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/JPU901802044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd287acd8f2777290e2df9f3710642bec53cda652dd53ec728765bea356aba40. 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/JPU901600942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4d6b8a74ddf60b016b98a662a3c93f89dd2cbd941493bca3e7bbe8a07b2451. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPU901602074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e96617e726ee5cffdcbb572041e55193b0e6783aa71afbe84679902474fb66. 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/JPU901701709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dae03d1495d83db79ae2964b11427b2e89045b225e2ba29fa189d7073ee5262. 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/JPX522400153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9467727d5cbc9e83333f7bf7a6549cb0a456d00a65de21666e500588fc058c80. 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/JPX522400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f093908e5dc9f19235155ffd31e3635ccd0fad7d43eb9271d1087e68f81806. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPX522300170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d115c053f4f7ccbe3150ad6e8ab5b2d37e8bd7ab4bc2545bee638406e817254. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPU902200474.
白いページの中に / 朝が来るように
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd365eb40d32bfb156154cbc47964ed9ef58f8bad7b54ef8f508c7031c718e2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPU902002652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf678713f3fd5112b2aaf729065bcd2ec4a1cb04bcc8c2389f2ed24e66c83e377. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPU902001046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd33dabfcf07a3337797ce659683a319474623b3f6f82684417e52305bb5b23. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPU902002160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3671ad6730023af32b53a1b952a5895c4e87b3851ea7ea21d719dd92c4edf6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPU902001455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5430e6cc71c7c032231ddb53f1e58fd9261674ac2f6eb851d9f61ee707aadeb3. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/JPU901902468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4d6b8a74ddf60b016b98a662a3c93f89dd2cbd941493bca3e7bbe8a07b2451. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPU901602074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4d6b8a74ddf60b016b98a662a3c93f89dd2cbd941493bca3e7bbe8a07b2451. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPU901602074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fecd45eda1a67a430b825fa544b761531da2108b80fe0702033adfae354a062. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPWP01900725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58309642fb6151881e31b542885ecea08ba9b4c90fcb0520731458dc1b64f002. 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/JPWP01900168.
「虹色デイズ」オリジナル・サウンドトラック
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4366db5d123d643ca55da16cc19bcdaa915896c8d584fe142fb8d3aec1a8662. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPX522500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05ce6061564df776319a55034e9618dadadddf25a9baf7aa992b1861702efe9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPX522500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c29293f789ce50226df1783ce1c2834e8fbb451008317563a9ec143f351f94b. 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/JPX522500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f093908e5dc9f19235155ffd31e3635ccd0fad7d43eb9271d1087e68f81806. 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/JPX522300170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c29293f789ce50226df1783ce1c2834e8fbb451008317563a9ec143f351f94b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPX522500017.