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 0x345296dea2f05e87a35940c90aaf5378f8511fec541cb8c44742cc64e640e5cb. 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/31e80a30-a316-4ecc-89ad-462b06d24b03.json and https://artists.proofprofile.net/proofs/artist/31e80a30-a316-4ecc-89ad-462b06d24b03.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 0xf55234624484d23f41e6f25603fcb61cb70edeed036347c67224290cd71de0aa. 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/JPCO02214230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43181a7cd1dce691b8ddf16541ceda96f477c299a8ec3d494125ffbf2752f0d4. 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/JPCO02213630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bb7dfdf73cd210e8377ff626c133b516f5b7e44343a915b963d86037df4b7f. 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/JPCO02213650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2158013a80c4cd771a425c43addf60bf9d9029af4b5eb31920cf337e8fce8f7. 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/JPCO02221990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946b034be255d9c86de155d04cfcd3f60a7bc35fe8f27c346a4bb991dacfcc09. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/JPCO02222010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63fc9ab7e782cb8bb60db1c7d734e767410943f72f7cfef7783201925fe8a59. 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/JPCO02222020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99b2e58a5ed2bc61ca86b5de8042fcf5496a09acdbc7766bdaa6aed97d3ebef. 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/JPCO02334250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84948cd55d9a60626a85d4ba6ff58306f985cd173580a3aac7de747d4fc468db. 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/JPCO02340010.
ラブソングなんかにしてやんないわ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd0ea8f32bbf894f755de9b0abe64ad49b3c750cb843d752caec24c0481619c. 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/JPCO02340030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f011382984a972114bc3f405beedcdf0dc1d450fdaf64a8c12774a586185004. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPCO02340050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb424372d2578b0ada286b515c58311fefffa3541c8e5fa0c82cbbb9b26761b89. 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/JPCO02413030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbd50a4fa986f638023ebc262217fd5cf1dd894fbd0b937a0d1b1eb18a591a8. 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/JPCO02413040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fc184eee685441dae056abcf4ee4967adfb7361bd8c565419db80804adf54b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/JPCO02431170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bcc0a9a117e35c06a69cea8b4e664343de16cfd3e182c48185a2e48edc2e28. 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/JPCO02502560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3f61448731fbbd25b1d33f7e65707bb55c4339bd8874ab11b3ef1a8e60773e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/JPCO02502570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bceb2b3028f10b375d561972aa86170a4c28f10354935dea67159f4e93ad8d8. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/JPCO02502580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d2d354f79af3bc5b94c99e5f03931589e06e9a2c2ee3c02f883243767c52f4. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/JPCO02502590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4749225e19425e7d2bf486a3ab959b1cc744924243fd86d6545e45b92122dc. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPCO02502600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2da0ced06073b326dfaaf0a0d5f5196f6bc8c9a9061cebab03e80f53eda9b40. 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/JPCO02502610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6001f152a9f25de698a72820da97af40d05bc9ed175d4671a57f0af7b59db7. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/JPCO02502620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29c77c1a9e0e364ea1003688aec0925b970c9af29a9bfc9abe941334285822e. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/JPCO02505210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76987ba2fedeaedbd6c07c552c1eb850531c9294d6ea758930f83978fe346fe. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/JPCO02516540.