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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa629c49b011ca6cef117a1e102859966fdf86b39b5428f4d7b5e9ffe8bf48ad2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35f0ba01-0bf7-4861-8cd6-a887be457ee0.json and https://artists.proofprofile.net/proofs/artist/35f0ba01-0bf7-4861-8cd6-a887be457ee0.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bfb4f38adb7b401690fa6069c4aef4b188cde5604596dfb4756bbd19c2b079. 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/QZFZ22317247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac142af5429374224651b0b7eb1e40f85cc7287e6f3cf1eead53a8aab558bfe. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZFZ22317250.
今日も何も成し遂げなかった (feat. 重音テト)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47355b4cb2b49baefd019db0ca86b6d3ae7f891a5dad6db32753069f0fd016ce. 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/QZFZ22317253.
バイキング・ビュッフェ・スモーガスボード
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888acfc837f39c4b7760210dbd8e133bdd17928d2f34d4963416e64c18d67df9. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:55:55Z), 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/QZFZ22317340.
(ホワット・イズ・ザ) ワイワイワールド?
インターネットがなかったら (feat. 重音テト)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56eb6b61284ad06f9415fcaa5d9f7b9fc748b90aa29720de27a58fb2c08308ea. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZFZ22317401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4251bd0cd9075f3063dc75ba78383dc27df4ad1e3c16eef7baee969a5c3646fd. 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/QZFZ22317402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc483c61a9850058c73934814f45b62b19932fcea6f36b5854dd062e1a8aeb8ca. 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/QZFZ22317404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c1e5ce3b52b3652f0f242d64df2c681f810a8d8779211427f25ab753c37188. 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/QZFZ22318937.
かぶしきがいしゃにんげん! (feat. 重音テト)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab90893fb3ef61ed7e90bd07963d6653d9b9ec632a17019a87ede769166fd72. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:53:08Z), 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/QZFZ22318941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0ca2ea60ad937bf86d0dd43ee91649da7e07b80070cf913ce9ce8ada4f233c. 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/QZFZ22318943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77924327c1697241c91436a2be7c47ef880548336800f8d9997724171cd3a64. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZFZ22318942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fa41aa952dc5d9e7670e6f62cd88888ea6e1a550631a1ccfdbeafa86d1bc33. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFZ22317321.
そんな気持ちぐらいは誰にでもあるって言われてもみんなニコニコニコニコ生きてるんだから信じらんねえよ (feat. 重音テト)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afe60b2770647652288ec896226ae35de24e58652248a766fdba0a72d3499f3. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:56:14Z), 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/QZFZ22317329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e647a2c4f4ee063601a2a426babc20334de2c1cfc8d98eae7a3a2fd3ce3aa9. 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/TCJPT2222448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df29435eacee651416e3f898f27ec33b36b324a020f89a16d61a7840ac07ad3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:10:09Z), 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/JP92Q2400284.
僕は考えるのをやめたい (feat. 重音テト)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f77d91642caf6c2aa2077681502241c090b6ba399554aba4053fc6706fb3346. 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/JP92Q2401109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33803b93e4686960bbd920bc517c6122f1e2c4844d0da93df736e773a720c7c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/JP92Q2502061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddac8828de7e042e70667c2efdf64719b3729e64350b1e2e0a6fc815e7434b8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/JP92Q2502062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84783cbe6ff9972e7d51da12644046e008bfc0826c3ae75abd3ab2276f741228. 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/JP92Q2502063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39d0cf9edc84e42deca27c87b5193ef62c347b056f17fb1539ad44d40677211. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:19:12Z), 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/JP92Q2502064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e6bb2cd6aa5fdda71d38d7fd7f4463844eaeefdf64f4b3f5b6490b059bc3eb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/JP92Q2502065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521b06d294b366497e4992e04ce61dec8fbc9f41623bc2be962505722d8e232e. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/JP92Q2502066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6153c3f6df8d4925b4b5d649a0af6a9ff072404f8aaa5652d9b988e8d334e0b. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:54:00Z), 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/JP92Q2502067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a63d2e7c0ac46e940dda7d93b935678818c391aa4f477d689834cdd3ef6e6d5. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/JPY392301525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ead50d22bb0501367bbe0a6d1379d1d9155ad71bbae85106fd42256adaeef7d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/JP92Q2400040.
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