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 0xb4e9d5a81e77a4d31cabfd34a4142934aa1dff6b9c8d7867504fc57700a9f9ec. 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/c4f59dfd-47c8-47cc-bc12-f0216655fb40.json and https://artists.proofprofile.net/proofs/artist/c4f59dfd-47c8-47cc-bc12-f0216655fb40.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 0x959903bbd734994f4fb0127c6a7008d548a384823c034aca9ce47f3834878684. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/JPE561301408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cc66926ec973cb76cca1e6095f6e2ead5d99e42ba360d6518f00500ed187e5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPE561301410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd191bc42554f2423c21831c47add6f0952a2d62e52889a37a8ca9ac01620bc10. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/JPA651202099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026b8534a73265cfe7c6ca9ad9c12f87e1ff2e3aeddd9ffeb758d7b046f2cdc7. 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/JPE561301415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda99575cb04179880ab38d87146ebc2c032bef24ef63034b86110b92a3f54d2f. 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/JPE561302451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd11e3c7c28f19bdea6fc2a61392db3ddba256f0f0dd829000217972dce59ed4. 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/JPE561302452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ce8e296be5a67d804bf360b941abdb2b392c39529e3df56b47f8eff21a7e54. 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/JPC231400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9929d943ac97bcd582e4802ceed129a0cc69a47a58fd26ebb969b51469dfbaa1. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/JPE561400571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81112648a4c23191280728d31352b40011fc1f3b770974d04e5601400abc5d7e. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/JPE561400775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd6450fd0a42bff8c9e566f551c55e766773dcfa42fc0b5c8803baa709b12df. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/JPE561401604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d88649f28ee451f1dec7f47472576b5a67d52b1bc1d244dd51a7d424fef3246. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/JPE561401605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd816ba587397909811341ea77f36788ccea8c1ff4cfacfc2361b6c51bbd28b1a. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/JPE561401609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd2613aafb012fa17639d077d1ed75606cb083a826e1758fb302a23d88b7f81. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/JPE561500162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afd06d20ead60ea22fd00775203a9a797f307923a66d313246b813f4ad2df4c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/JPE561500163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3887aeabfdc35379d25d31c1e6a2ae8c0ff649b0265082813b8dea53f9693203. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/JPE561501694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7401107532439df267d8d24897753f321437e3790b43ea120826cd0c68aa2331. 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/JPE561501695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819dc37bc6dfa644c375c4fe9e80411617a5e16815302a94deacaa07adef1f69. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPE561501698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb806459a0e181808abe625425b48201ea944560e2b8242ebf719e370cb74f478. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/JPE561601089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359045c821fbe3273c016500889f9c14a90f2d88bfaab2305eb57e1c09f3a256. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/JPE561601090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84666825571615a083e7642b2086ef1c7320e7d43c52bf35b4a1a55e93e56fd8. 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/JPE561702951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6959c1edd23d982561c8ca8103ded8c8b21c2817d60cc35ef77cec1962caba. 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/JPE561702953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f68cd7906245933f1f1477beac8d87309e6b388dc42a44a9472c0ca13e5661. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/JPE561702958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d14c5536eeea5b6b3201034d1847923a33b4a450a866108b28ee26830e85a0d. 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/JPE561702946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bce6816e51f78313d016199b05701e7b1f7e1bb7e143b68d362c432702c2cf6. 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/JPE561702948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cc4048affa1269daa6d54c45d222d2aac09898b0d3eed26cfc651b34c1db3b. 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/JPE561702949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7171f47067439e9f59fde94c51fd72ef3951d78147851c48b5b17f68b7fcd0. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/JPE561804325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1680e30b528fe9aba2ddb8cc22832274bcc40402c659b71cf589e5edc18bca9e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/JPE561804326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703b1308eb44a6a1d154e3644cba1ca76ebfe04ae06c60e55d82997817e21bf6. 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/JPE562007061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaa2468bb2bc106ecc2527db822e7fef00f892e0599d96443fbfec5060abb5e. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/JPE561805273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c46d09306fd84e8dbc2875a5b299fd0d84c2a755f5493dd7c4af9c5d8d9e64. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/JPE561805274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cca2b2b845e77f000abd2ac423e19e1c86a29f70b2f8320469fa40625bb33b9. 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/JPE561805276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d53a0464a60414766b22f05b9dd34e4571a63014c7785283263e7ec758d24f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPE561805278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3014cc2c951385ce646bb31f0e419404ddf11d66340c7add4e7368c9a98ffa12. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/JPE561805279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100011bde1b3d2156424816a44e9671a7f37e81ceaa632314a8e1cd5eae51ca5. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/JPE562006929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a119270645350cd2e3f720db6069a8cf1208d697b9c7c1d4d03b86f7e059b57. 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/JP92Q2400482.
Amazing Dolce-初音ミク「マジカルミライ 2020」Live- (feat. MEIKO&鏡音リン&鏡音レン)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6ec87cbdaaf023a452c6895b8f70621bd4f2efc46f4a194b63dea07039655b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/JP92Q2200217.
Kagaminext feat. 鏡音リン、鏡音レン ―10th ANNIVERSARY BEST―
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1f66242ced007e884732985a04b91514036de281393035f4dfbd2861d0a73e. 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/JPC231700359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b6d4343c7f0a264b9d912a54b43c8f31dc42450fdaf42c66f736cdf21f49d6. 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/JPC231700364.