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 0xc049d67a017ce10dd8cbcef26a68697a1363788ee7c578e49344c06806f20783. 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/3799e04e-442d-41de-a024-dbb00267bdc3.json and https://artists.proofprofile.net/proofs/artist/3799e04e-442d-41de-a024-dbb00267bdc3.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 0x9ef7c981fcf50611594b421c64cd6c52e318594ce777827a48a42bfac2f4dec3. 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/JPP302102034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76b5976983c1b2f3d1c260ec5bcd389cedaafc8dfbdbf1795f4d538ef9182e2. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JPP302101775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76b5976983c1b2f3d1c260ec5bcd389cedaafc8dfbdbf1795f4d538ef9182e2. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/JPP302101775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bef81d548059156de82e08ca41c108bd61508f032af2dc17a624e5cb7064857. 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/JPP302101776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2a35f2b191d3ca09784e30b03f6881539f35d9cbaff6ecf121266d69a7dd8f. 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/JPP302101779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9562ec37bf8d7ab1493f692c68797520dbcfe162a65ee66250b9d618e01be27b. 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/JPP302101804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef7c981fcf50611594b421c64cd6c52e318594ce777827a48a42bfac2f4dec3. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/JPP302102034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222dc3ab37fc8ebc9c1770bfe8fc60215d8742dbcc976428a2e3f5c261bbfcb2. 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/JPP302200237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13416dda06d9cb9dd7ef06b65c6c3bce89c77c8a108f328c4a81f751f0e4f014. 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/JPP302200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2baf22708f392adaff513825fa1b8f3829cd408ed9f63c5ae6b5c57a400728. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/JPP302200807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa792e37341d0f7a6f280ec420531965caf747299f9b4821fd789c8e18d0cf813. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/JPP302200481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2baf22708f392adaff513825fa1b8f3829cd408ed9f63c5ae6b5c57a400728. 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/JPP302200807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1000be626de3fe50449f9df77bdba64ac3ec6c60d06d57452d54b24216665f2. 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/JPP302300225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c7117c45e2660313627ad6f73e885c51bcad934fcf481cf6d7018f1fcb401f. 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/JPP302300227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222dc3ab37fc8ebc9c1770bfe8fc60215d8742dbcc976428a2e3f5c261bbfcb2. 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/JPP302200237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a75b1eda1d09779daaf61662a97319efc42655a45c07d06ce1fb0f511ebdd4c. 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/JP92Q2302020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9458c6ef48442388befe4ad5e66e2cfa4e1b1b4823623a5836c88acec2842af1. 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/JP92Q2400189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5bc230fd2236eb301f7415ac9a24743bd81b20abd1bb84e77e30894c6f6d07. 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/JP92Q2400474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5797de109b0e7bf66e6805f03a66878ace7250d824bf06d21080dee60eb1b48. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JP92Q2400475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe00ea1485ac7ce1d3b07cfec84e602206556bfd0238c0399131923d785fca6d. 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/JP92Q2400476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0836b7baa0701cd63d9b31b0e1a478c75f0d927d4e92bcef3b7c68915084ca41. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/JP92Q2400477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803b35dd4155d9bafcbaa80aebf9ab82e2eb3b91708fdb73518342a750ecacb9. 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/JP92Q2400478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0107ca412999ad135a27a5c2e94f27f053c2c4b2273dd5b23d059e98096fbfbf. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/JP92Q2400479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aca12b34536b24b746416ac9aa993a78885f7afacf9e84a1c12a9dddc2f9451. 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/JP92Q2401337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e8013b013f36828d07a958d6f44751f3ca973703610b9a8be5d23eb6e298b5. 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/JP92Q2401338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e2bdf8fb18a45cdca151e19a6839d885a7daaf9681b23b4251146e6c5053e2. 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/JP92Q2401339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6772a0e53c2d1e31b4a253e0ca5bce7c957feed92df9fb4c9c81611bcfc2ee31. 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/JP92Q2501818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a793344c4da926e8116b0ef5274c5f2125e1ec8134ad04b65d170f1e1f195c4. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/JP92Q2501882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d58596170542ee7d9cd8e8c7b74834d4d0dfccc441e8cdf602228b672a255aa. 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/JP92Q2502208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d586a224149af3e57e83f65934331fe7a4fd0795e8df9ef612192baff60506. 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/JP92Q2502210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5d22d5cc5487cf80cfa4fa48448c2e2a06b396d57291ca0d28698b91c1a4ca. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/JP92Q2502211.
Noisy Love Songs - MAISONdes × URUSEIYATSURA Complete Collection -
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be5abf92455a8840c92fed2271fb6e69f7982011b86abe16e0513b6585355e0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPU902300569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be5abf92455a8840c92fed2271fb6e69f7982011b86abe16e0513b6585355e0. 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/JPU902300569.
Project SEKAI UNIT IMAGE ALBUM セカイノオト vol.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1e528b4064e621b92d6519ea011c2ac49b6541c21beb20aaa00349d1f80817. 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/JPX302355380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13416dda06d9cb9dd7ef06b65c6c3bce89c77c8a108f328c4a81f751f0e4f014. 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/JPP302200701.