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 0x66aa4d3ab8c97872f28cb5f3e92805ce1000764971420da62d5bc7fc0f7b96ae. 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/4be8fffe-6212-477b-810b-37f7b82228f1.json and https://artists.proofprofile.net/proofs/artist/4be8fffe-6212-477b-810b-37f7b82228f1.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 0x26e1cb07c85dd44a162791d442a6a0f0cd7612f8268fb313aa25f60332a229d8. 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/JPY252100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7352b5bc485bf1694383dd98957289a3f04898858f59653720f014b5ff7a7b. 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/JPY252100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781675d7a0b09226c60d0126937cdbc0e3ffb4245a158240c63c66a059c15e74. 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/JPY252100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac9c62fb7195c52216017203f872713e72545b2672147fca9bd5def11a3d723. 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/JPY252100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f10751581d5da36182f785f3b08fec4e92edfb1bdd9abc31f0f218619323d0b. 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/JPY252100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8167ea515147b0d214f24b7c1a39872c551267c50f42a79ea8a3cdab7dbfcc32. 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/JPY252100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5cd44693e4ef9152d403b2eacd2b7f0c1f3534409b2da79fd81ef6f2316b43. 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/JPY252100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec7e8bb1cd6d1655c9a0fd244034bb4fb45147266ee91fab2eeac7b34f4a297. 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/JPY252100147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bd6a7b9b737cc38559b34696a159c8cd8fa2c06d0bddcc4332482e44163810. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/JPY252200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f28324d7d4d1ffe73ae30634cb85a581e06c6ee5628b9a2c65d25892e2ef05f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/JPY252100162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56165fee972f1a9ca59500ada33074152d422569aae39b5e14facd0e757b0db7. 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/JPY252200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24ab204ca12607e6a3df821ce3c3e0190696cff3429c704a2e366b4aa5f824a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/JPY252200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc798980a5d9ca1638fdad2a64fc538257f8544a39d4eb4cd88eb1df3c2e0eec9. 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/JPY252200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8502b393a66bed5ab9e176d79861bef5406a25a7b7145aaafaeeef4831525b3. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/JPY252100152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fca593edf6d862af3102b691730f96a1dff456ce10c233bbfdc1757c8dab4c. 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/JPY252300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f74beaa5697bb2cfb2f878fad4c076b3a7959c3beaee030f46a444aa321f68c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPY252400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44135d203ab92ba8c541b53a37c205ac30085c4607701be5edc708d7534c2d5a. 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/JPY252400080.
パラドックス・アシンメトリー (feat. 鈴木勝)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993a333807255972431533dca90d5b27826e19ee2771279fdd0ed8f14c9b821e. 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/JPY252400081.
失われし最終楽章 (feat. リゼ・ヘルエスタ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7418c874e3b0b147943dad766fa7b5794c140b2f4b9e7e815af5d4430085da. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/JPY252400082.
Andante (feat. 周央サンゴ, シェリン・バーガンディ, 健屋花那, 弦月藤士郎, 鈴木勝 & リゼ・ヘルエスタ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edec4c6d2065a349fabd5e3ff726bf99d6e926c3a06f63a77d358437595b517. 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/JPY252400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f742a2e5e19f21e4bd2c887e266979c6389c09b69ba2767cc3e81e2d74a044b. 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/JPY252100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0343b8bf8d30315f33122df1ad05db1626850cbe3515becd3fa86d951bbca6b. 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/JPY252100117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81305ac1a91aef20dbe100996af981a724973c4e748bc6c1304c109d31023103. 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/JPY252100119.