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 0x8e1867714d0c137dc115d10df388a6eddda7ca42575fcf2cd30e2ea28712a426. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15854fff-e941-4d99-8496-5dc210892cb1.json and https://artists.proofprofile.net/proofs/artist/15854fff-e941-4d99-8496-5dc210892cb1.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 0xee2d9f12051c5452f94f180af3bbe33265e266c1230b6ae13703e964074298b0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ61942051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3cd56bf2eefe01781c710b343a4e23a612c69a0b0666435aface9a3a2362e0. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZMER2108335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ad25572ab2e15bc1407e54c1c434dcac62837013d756c2ea7d849f607dafcb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT2AL2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707fbe16f598d1eb9b7091b277e2886497785f66837447e552f4fb0db13b0a09. 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/QT2AL2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2277b165e8933fb4809d45b6994b2d16299d294a5193aa3236084ed5b8c72927. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:39:17Z), 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/QT2AL2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560a0430a4b8c3e656b144d2f6bfa3b98526373bff97b33784a7e6cb9741cb67. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT2AL2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b73fe58ca6b97eeb2e051791de08c5b85132509e1e35364f701d5eeec8aac5d. 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/QT2AL2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1e3336f55fef93295a3a53dff4d0489b13bc17357a7f170bf6ddb7431804ba. 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/QT2AL2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50757eb286b07b9214c1a3366787cab11847caf4d2f6c0b8013d6ff1494f158a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT2AL2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd073ad3b77ff45ea8876a183a03ecf2a4df973f07be4de9411cdef50ae69b87. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT2AL2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8190423b2f4b67181a7aa1215e69a2926e7078273e558fba17ec29ebcc159cc. 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/QT2AL2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7b0845bf99cacae8d522f9982347fc177f5bfdbe8bff29faab99898114fd0e. 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/QT2AL2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3278d6fca62ff6f2eb301e26081107d12daaa55d944ebd3564974d08ba320e. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/QT2AL2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f7fad2689903ea649ff12d4ee8b29bcb73457dfa93e6dbf6e318017f9a7530. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:59:54Z), 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/QT2AL2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5326c5c17aadc174757ffff1246f1c67fbdd69713c9cc83ae8e67b1555d92e. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QT2AL2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cd559735b5873831b9450daae706c845f8d6b6cea1880c03f6c68ca13e6a1e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT2AL2400028.