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 0x353597d04f7215132a6990e3de04bbf9f5cc1525fff8fb4c6b6468de9dcad2ff. 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/eed4682b-0647-4f8e-9e72-a266f81b43d5.json and https://artists.proofprofile.net/proofs/artist/eed4682b-0647-4f8e-9e72-a266f81b43d5.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 0x80af496ada5b74f4f63c0054df58a6bda0fabdfbec088d0d0142f1dabaf2b85c. 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/QZNWW2219492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90813ebd5a8180564578ca19bf3e1c6167c092d13e16f6a589ab5f1097f81faa. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZNWW2249913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4ae478c59e68841d54d8561dbe748c79df22f4f3f633750326a829f8463375. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZNWX2247993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6670ffe94e3714d7380dd7627de85ced89ac86d72520ab1eb7fb83fc19e78da. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZNWZ2234497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3808b6896d9f288793cca0bb0c333d27387a31944482bb4e0892f5dd661e59b4. 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/QZNWZ2267927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c7fa8f40b02453366f4657f4dbf6a60dfb942e86630b07f006621608f5c621. 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/QZPLS2214925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08dd25fa5eb854905dd0dc75a0709356b9cbbfb893aa0e45b7ed7914a345bd8. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZTAW2202434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10ecc44d884b038824919b0960f9723ea378dbf1b2d4c202c56f5ed86a34306. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZTB62236319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819caa964e45316d45ee8086a8dc1700fd3478384100190d0190902981135157. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZFZ22385509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f78caf3ac5f1b9a03fcb9b68f18a545e0a2040f2072ec14943b4ad3c4926c7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ22354059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcd6368f0a4341acd9f520179ce5d95b889ce2eee08d4314cb288e282cd0536. 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/QZFZ62323813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da10ba1c651e002c0e0500d18960280f38d000d9b7118968c8f5774c389e39d. 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/QZFZ62324980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ecb910dd4ca2c5cfa4c20e73b29d26c8e22331881dd2780b682628f6aa976b. 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/QZHN72460390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ecb910dd4ca2c5cfa4c20e73b29d26c8e22331881dd2780b682628f6aa976b. 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/QZHN72460390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1029f334b8a69be315a0cc299301cab1334c706e89214bee7337425eb8ece7b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHN72438109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f8e50f1434a5525c9332e7a1376f3ae897030e21c504cdc6ae039abc012a53. 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/QZK6N2481638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbbdcd4aafe1856fe6c10affde5d1664319cde5e832d202bb0240e46e7f581d. 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/QZK6N2458851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22959206f90b80a7c83bc16d06669571894e2a4c711f99d4f62eeeddc8bbd79. 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/QZK6M2433250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9a29987308489bb045326cb6c47f3bf3f2648f7fbead2bab6b673292bb8ca2. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZK6M2445374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae43a92165f657ecb93f4fa94abdb4438984f942e1db721f0ce344ef0908030. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZNWT2448474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569d8ec6134b2d0dfd5e89042375b641e3f6fd011c2d7e6dde55e1fe14851e81. 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/QZNWT2445777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569d8ec6134b2d0dfd5e89042375b641e3f6fd011c2d7e6dde55e1fe14851e81. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWT2445777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ad5eb194d8733598614a0930f9227e2924e92c87b091b9290d39dfc58d4875. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/QZNWT2448513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0062e94b0bd761dae5a27959f1d46242d0628915bdad439516f00cc0f24939. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZNWU2406904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fa6c0dd4b0d10f3c7a544a4020ba3c95c340b30e946a6f9ac3af51f5bfea52. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZNWU2455869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07f75d73c0c1dabad424b90998bc0f4ed283900b405ae969e45a0282a0083df. 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/QZNWU2406941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849a954309ffe682c08b85c283d86d6281befb9fc6caf8c5f2b9588caf53710b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZNWU2455866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3a507f6f908969b2621dda0596cd51801dc437190413d7b260a19eb55a7d4c. 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/QZTBA2483922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6721a61f8e023a0d508bd518ba890a09e4dd69aafec92f70995f32e19c8ae3. 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/QZTBA2481418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe777b9694ba02325532cb0d8a4bae0bdf889eb14b342818e87664b1c22c5bc6. 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/QZWFP2499506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe777b9694ba02325532cb0d8a4bae0bdf889eb14b342818e87664b1c22c5bc6. 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/QZWFP2499506.