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 0xa495c7067987b0de4f2c7357c335fec6c488bd4f8161da04fd1912fdaed0e1b9. 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/4b087dc5-780f-4f11-b837-c7479bff8f52.json and https://artists.proofprofile.net/proofs/artist/4b087dc5-780f-4f11-b837-c7479bff8f52.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 0x886a45bd34a2ea56550e9541d0a2f57459760479514d7c816aee4a9d35a75b80. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNMT2044105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c1de553b4dee8241d744795a038befb62dbd918f8187203ac80cb47319797e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:04:22Z), 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/QZFYY2186677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a093f79a0458135b4021b0921532602b951a577e3674352d856fbbcff1ae420. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFYY2186679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd232bcb6855de305d08be75e36eaa16ddaea81ee1d2577ff4f308b452456313c. 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/QZFYY2186682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a70030a482cdc7d3e49d26740ae75f8b8f9f87afa1ece025f18876d83b9b0a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNMU2114698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c3d03714da861250768fff9c66af6a2befbf2ff7802b8a04f6284ac42126a0. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZHN32316894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b90646d17db7aea2ac425e1ea2834fdca1f68eed3bdb169ec85fc2dbd859a7. 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/QZMWW2400839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71033165d32c0daa0a192f48a63d2328ffd718134d3f3561ab70e7cbe1db55c. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZWFP2492049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c055be619aad31a290aadecadb1325a1f609d7843f6018000a031ee13c4cb2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN92525474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a54f2d467cb7428925d970aa39b5b6b8aac96772dc66dd1c692a2a6250a47e. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZHN92525475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6224b4511309fb404b82203943cc31405218813d2d3b4da26f38fbb89d3e783. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZHN92525476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6370967c5199903c914f3b5d954dabdc0f66eeede96f4c27652b6a102334bde0. 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/QZHN92525477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78948f2422048466e7a8747af2dec43572855447a339bc2012a47869c3d387c8. 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/QZHN92525478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8fc0bcc22f798ea8507ca8164b4dc8a1f04db1e24f2581a1a6f04b33ced9fb. 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/QZHN92525480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2510b259790deafecf81ce0d6c285d4d7fe921ced0176031bf007018e11dc923. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:49:38Z), 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/QZHN92525481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dc98a2eab8acf972887a66a05775ab0105f73357bc661f941ec2028084fc56. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN92525482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2c2bfcb433ef8cd09b89d0201709a4cfd800081489f8a77699df9504d16a7b. 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/QZHN92525483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bd1c0197e8854519de8b043c1464ce361d2eae5d7321caf903bfbdca3c4cbc. 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/QZHN92525484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656dbd5325ca1bd1275b875ffb74dc4294d30e8a0204f9ff2d12454baee06c0d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:49:06Z), 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/QZTB22575352.