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 0x1fe989a22b8de8239993870032e352d880cbcc7a10b7d5c58ef5b8036d9ce7ba. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be5eb2a4-adb3-4167-a1db-42906543b028.json and https://artists.proofprofile.net/proofs/artist/be5eb2a4-adb3-4167-a1db-42906543b028.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 0x3ebd7122bb212f5e7c15fcaefb75484eb91069fd9b94e0701e525a876bf05ffb. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USWH10200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d87de6a8ea70be6ddf7e38662bcd36895c0e19b4606e4ae410a0a20b76cbfe7. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USWH10200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5d37e79cfcc3ad76c26e6ceb0f5d49ece7f0c73304e4126ac8c51b455bcd33. 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/USKO10406383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b409940cf5d77c5e6cbdd38623212701615c99ad64687ece66190810424bee. 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/USKO10406384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751c82d85642790c9e104b624d8dd4c7d72a6a8ea7b3f21218ddd24df6299e3e. 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/USKO10406385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe919f9c431021777d3be2ebdaf461a252dc913667d1398ab29540b1b55425eb3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USKO10406386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2fb96324e089a924edd284acac1fec269213eacb53587c1ed1bb81fc0c3a82. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:56:03Z), 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/USKO10406387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54a818f3326c867464c3ecbe37e373baa0f3d4c5b20bde629c96ebc6082cbba. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:45:22Z), 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/USKO10406389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1234961a6c732766d59c5aca0aa87ea421fc27bc0354a6832ac34f781172e2b6. 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/USKO10406390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1d5b3a926cbeeafefe55d99e8cb24e8792865021819bd87f8ee2062c21b593. 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/USKO10406393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bdfdad37266dbdd7b669804b034dfd0197baeb92d5901902b57cc0cf9a4152. 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/USKO10406395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d16d145480fd24eb8c6608342c28b480cd7ebe63df2d69fe723dc9f82fc6123. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/USKO10406396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f7e8e710f807a743355fc818f6f4b220dc1ef585db49718ee0082dbd3c2de8. 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/USKO10407317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eac79c665c0ae516d1c6e3576cfb0e4acc14119aed7bfc9ba11b723fb033401. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:32:21Z), 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/USKO10407319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14522c88600b3199721ca0b0d6d55fca19f6e0e0f851d7c5957a58add1d6e1c1. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USKO10407320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec629cc5ef1199bda40bd6848068f42d134a7c5b48cbcc31851ad32f4e00e98. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USKO10407321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab3b4b26547b5f8815bbadc1e3ba91c929762b271a82dfed427e1e41714f2c8. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:29:38Z), 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/USKO10407322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d28b6e2804c0d490538e462ef2913d7c16b033480be50e4c1c56263522480f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USKO10407323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fd58ed5d38198e6e9eedd8f4d3adb4da152a4d863b3456a3b80e5c3474e9f4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USKO10407324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59343f146d938f0ff7d8edc013dc35b646eb7077620d6679b0f593e82ef5630f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USKO10407325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5c344b28e320496e88526a78c5000d5d8b6fd96b2910f098691edd000ed939. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USKO10407327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803abc312545d0ed7819710f3fe24c5a98ebbd364e97d109c1a3bd0950e1c90d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:10:33Z), 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/USKO10407328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5726f6ae7bf640a0c78260be2d2aaef34da0bf968d326090947cebc18997513e. 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/USKO10407313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f897ce6cbeb51dc75d3b9b0a1323cd62eb2cecae7e4af82a6b3c9fb57fa1b3. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:52:17Z), 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/USKO10407314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf722f6c4262b1d5fb5bf4a1975f73bd7a024f9ce0a60e4a0cc1067d05185d71a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USKO10407315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fe804b861413a0c962a0eb66f1d9fc8a43adef9dbd4902d7a71e8fabed677e. 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/USKO10407316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a5c7dc1923274d18f8c8370ac2fbc686db7b2b6357b172f716361926671a90. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USWH10200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503bfbb088087a7b7b59685044bdc02b9242b03d0b10185ffe1b3fd61615b75f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USWH10200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503bfbb088087a7b7b59685044bdc02b9242b03d0b10185ffe1b3fd61615b75f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USWH10200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b51f34336ee390ea728ca7f63c421188ee6280a117977a55b70d703ca72b2c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USWH10300083.
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