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 0xeaebe6503b48e97922fa58e73d015992b43379f516dc03bda3364eac77450158. 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/10d2081d-162d-4301-8636-cd137c25fe3d.json and https://artists.proofprofile.net/proofs/artist/10d2081d-162d-4301-8636-cd137c25fe3d.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 0xa335a472ee0d1f5b09da55ad1887a2bc9df5885f7fcfdbb0f603ce4e9098bae7. 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/SEXEN1800509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cdaa29a218c2ad4d6f1e04c15c254383153ac3a5296619eacbc0c94f1bca75. 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/USDHM1004134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a9d3f04d541d7ada2ed2e80597aa5aaf3c7dba47645edfd6ec37541687d0d2. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USDHM1004135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da4c3e608f33f083ea5aed2f0e17f0b5278f9f37c39db5e712f26c0723f4eda. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USDHM1004139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf441f0c07426d013b1a2fa7542ad782c51dec63a48f10c5096841b5ca2111302. 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/USDHM1004143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347c991527010a44828d685baaf0b15807e3c1084014dbbd5ba03a0c4d25c6b4. 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/TCACL1683232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d2571cef76cc80a04b15bf4c4ed5391261ac08fabefc4b4744e3edad1fbb50. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/TCACL1683233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047986e7a4b813d620888bd847ddc38caf4abcf5ebb1830be5fad26429d39f71. 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/TCACL1683234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796ecac129c59799eec0070bc7c8328e9d9ea3ad12902c7bde0882b353505e04. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/TCACL1683236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb903ec76ecfe88022082dfc329f8bc2023f02d8e5b3c23de4d791b6ef3806cf. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/TCACL1683240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa8881380abd9bb9b820dff3258dc3d265ce11d742d6caa93d92c68f3b0aafa. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/TCACL1683241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0573d560663a6bc03006e23a3656dce283b3276642ab6f51d0fd22123d4372. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCACL1683243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cff630f5af9d26ace19368ef2cb6d5efc57e2b67b48eebb4dae74e521e2896. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/TCACL1683245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3124d85b3539633b22c15af94938bbd8976c87771d8d7d0bada83a532e817b73. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCACL1683248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf578a01ef4837c85bf1db7d830a6b5a8d78cc221fed40685bfee1838cd1d53c9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SEXEN1600205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe193c09b75fbca17f71647560e2af22fc817783cbadc8f4b3b8f665282d7d498. 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/SEXEN1600207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5b8f81af314112e0358328ca01b94d065c865b9094171a4079a50251b26d4e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DE1KY2402772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e747679eab56eb3e5152ad50b10a1e07271f5f947662c07b8d3f8e48d199237. 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/DE1KY2402763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e747679eab56eb3e5152ad50b10a1e07271f5f947662c07b8d3f8e48d199237. 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/DE1KY2402763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb90878e84903c4deb64db4115c3068971e279002afa859087da5b9f5656c294. 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/DE1KY2402764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2176869a0f4fb36a322f5da1e6b8273d6ee9da396f255089b50a274652368a. 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/DE1KY2402765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7380b7ed9417393b2cf6c72587bc8761b21e9f4cafceab0b450fc74f395fa65. 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/DE1KY2402766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1616fccb6bb57def5d973c41033c737b97579fbdfc0ae420e6eb94a310085d2. 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/DE1KY2402767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ee65b2a92c6d5e3d327159ccc9835314709997119fdbc543a87a00476be58f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DE1KY2402768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23539589fc36385cca013d90b3696a6450c77f3026a8194b6b1af10a757eaf3. 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/DE1KY2402769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34a8e3593913e80324fce6b77010d7ce6790f0ee7fc6f3a688c41d9787a06fb. 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/DE1KY2402770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ded6fc6bab1a4737b5ea15b34f6f2bbcc40b2469cc66c6e0e572eef3e472901. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/DE1KY2402773.