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 0x00f4a2037f903cfda6e2967307e7d1c866c788cabe55f1d52985ffed74fb6425. 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/cbc93316-26e1-4364-877c-1acd59a44b9c.json and https://artists.proofprofile.net/proofs/artist/cbc93316-26e1-4364-877c-1acd59a44b9c.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 0x9262f701d4833dfb84a1a45fca1d0aa903ca698342d5464ef486f743ba56de65. 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/JPI100700913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d98b571844fdc5d6a34e476fa3d6880cc8d0e785dd678dbf584278cc47d2b75. 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/JPI100703003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd435329b5d7a88636b8a7cdde827a50a449fca774804311a03437864dfb5f0. 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/JPI100801450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e43bb3779445d61ad01febf05b67198ba7e910fbfb95d92efdcd77c14d6be6. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/JPI100700908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f9f7d6e2f7aa96a1821fe4bf340a0e36632f9f8afe636bd21c93a123848e69. 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/JPI100901878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7b8f27ab4763d0ca5e6be76c1a5f348898807fcbe58e86385127218151d415. 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/JPI101002184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe5ed720361e5a66aac2d2e2c9c83fe8948cdea81c0e97e0081de6d4ecc069b. 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/JPI101102449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf64b2fd88aaac222f521eaac84db4966382e05fefe659cf3f4238d2cc524205. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/JPI101201996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87041d0f277afa6522f207d93d50194e521acbf1577855b8be7f8605a5f4c189. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/JPI101102451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb9bb63cbedf009e3a6452cbeefffa1b2a9e843899ee07f1ea83ec86891ef32. 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/JPI101402277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6673680110df84ee8f65d540b7a943bcb695bc412d05b70c0c3fb18f00d8f7. 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/JPI101500850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51aaac4a38a7c2cec8b1ba997f0d9cbff0e1f4830b948424849d9e10abb3d91d. 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/JPI101500852.
おれパラ 10th Anniversary ～Welcome to Paradise～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8bbc667038969fc6ab31e6730b23c07f77c6b6e7aca54d9b58fe07b00401e0. 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/JPI101801111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee26aff4055f4b7d7da33c1b1eab22910bbf0373ca76b0f044f772dfdc5022b1. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/JPI101701050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ede1b14412bbbe0fc36d34e7ebd5cadbb35176ffbaebd0ca3f950261ac4494f. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/JPI101602358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4576cdc7294f6c589748931bf627c6ea2b0df0ef7b6e17f2fd5ae75870525f. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/JPI101501841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4098b118397614601c26216567a9c942f85b1517da1fbc6df8d1b4a7d7ecb22c. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/JPI101703028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e830ec15fe690dc5bd8425cbb380af97aa1b3e9d5f99a5ec76afa67be6cd9c5. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JPI101901848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4090105fa85057d48ed58a30eb18504465cd3ed02f28024e23f3e330ecc2a5. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/JPI101901875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b8421f16c1171911b15b20fd3cd887d197e2f496170b5c14cc3810a5c6c812. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/JPI102001443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b677611d5640e83fcbc33986b3bf77d13d89b663a8d1d3304aaf5149e52c57a. 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/JPI101901847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723efb8de85b3f7a4aa0a6bcdb99b828f11b63a06b86203df7917ebfcafd7c76. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/JPI102201328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd40e9264258d4be1fb0c41d6cae4ad5ffb8ff97861203a7bd4f755fbf2f0d07. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/JPI102202097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd317fb3406857cf9d19c1c61fb422373f108b9c2fdf79bcf8446dd6adcb09658. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/JPI102202218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb3d7a7e547182961817a35e55baa1e564a4fdba338c04c16083a1fe2b54b13. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPI102402880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de7f0c57eaaeb7a3cca7e3c9a8c45488b8a0564a4310fc30b7ee7f5e9715b08. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/JPI102403163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb3d7a7e547182961817a35e55baa1e564a4fdba338c04c16083a1fe2b54b13. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/JPI102402880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23db435bdf5bd5ddd71fec70fadfee8a264714fa0dbd359edf9e4926bc507c28. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPI102300345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74642becfe467e642079bdc6644d9e9d36e6ab0c85c6182dd04528c422996cb. 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/JPU902304403.