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 0xf5dcbe886ee4dad20cadba9a8f95b67e47be47d660d90a242725278a44cedeef. 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/4d150b06-c85c-4ff7-8f3f-0bd4bb17ef74.json and https://artists.proofprofile.net/proofs/artist/4d150b06-c85c-4ff7-8f3f-0bd4bb17ef74.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 0x57592e057a0dbe8ef96b855aab31842acb7ae3d6a57a9ca9cffd31e9bf22abfb. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/CACWV2507189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ef5c437351593be6450646f41824d47300606abbe8fa7478a98411f73d7d7c. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/CACWV2507192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1ff92aeaf7ba89a8fcf3337bb5bc40cefab15fb15ad73dd411ae7d3b3a4849. 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/CACWV2507187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37ad9620a6d094cd85adc00721c7f045fae3db0d06e7043d0e48e8ba3d7c7b1. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/CACWV2507191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6239e3fd1c1f7903a581e06c3c8ae93023cf7f5a0830992f64c0b37525c576df. 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/CACWV2507188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c1b7e67967e908a929f609b8ef797f98577a3b69265d74d18b36e9d16453a1. 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/CACWV2514920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784ee82dd86a794aaf5c06908b67c1d32ff25ab79f8e62617df7f3eb2e27c825. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/CACWV2515021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f9da5e81e9bcfa8f0c0822bf0413222025a73ad36dda5e32f2e304944f5aa1. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/CACWV2515054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4c0d521adf5097f4cfe1a8032d4d00673c28b2ce3548bb58881adf390b1f1e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CACWV2515078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45763a7d12d3606addf92e64e4d499c9e3ce60cc5221644a18ef35b041e99db. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:28:55Z), 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/CACWV2515065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee2ed9cd9f6c8a63a5c8d207c4bce851edaf14a2984cdccc747baddabada729. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/CACWV2518896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7f00a2706d3cca654e936da4b4065d755527b161bdb0eb4546f1f343db14f7. 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/CACWV2518808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0812172fe32ec1b84c6eba38e1d13d390162003ca7ae675e150bd1ac217122d9. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/CACWV2518812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b38932d61ac06ca7cc27e267b3a5fce2deb760154a9ce49195f14735c9c0b8. 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/CACWV2518895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1483a3815742c60f8d05ae06ceeea407d2992455daef3ed0dc592d0116a90af8. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/CACWV2518809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a20df32fc0eab2241c8a2466039fb1545ec073abeb0d89942c84c70de93973. 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/CACWV2518900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdffc1c987c9e57f592ca286e2da65a0d8f32bca21006849f616ed1ace1342c. 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/CACWV2518897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a7698f5e0e1a99555aeaffa726973053f4865b4c50e39db9268b2a2a81a874. 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/CACWV2518815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225d9a9ce1569a65dae9c3f40494ed6ec95877e0384a4c229fd5c3e0dcf8b73f. 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/CACWV2518902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8de623ff505844a219aa13bc71a7345bcc69184a4da0bc663732a5da3b00f7. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:59:38Z), 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/CACWV2518816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3569192c942dd19840876c2e8e58339e0c7290d44ed72f84a32fa80c320389ff. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/CACWV2521724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ade3d8c40f0b78dc5a6be171431f939b51359f9d32671a064d95823793f2a25. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/CACWV2521522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b3436b23d0994deeeb83172fccd7ba4d4295d46a3e36d4acb32e66e7ddd5a8. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:48:50Z), 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/CACWV2521560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b3de7637dd6cba5b821f7fae95021e7642f4eb04f60a90a4c36eb0501f35ce. 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/CACWV2521528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce9b6a5e6e5298a33b357089cbb329c63915b22d5f4f9e9311166c92126e80c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CACWV2521723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1f968f4fbf15837e1996e6b8a230693ba90015b9f5d24c55601458d5c206f9. 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/CACWV2521726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44a9fedc08dd37200f20a9babb34888b3c2ed90ec487df3b93cbec0b3e09b37. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/CACWV2521551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b07c54819acd888dcff59bb0211bfc9b0c84b1cf8bee5c338082048488b4fe8. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/CACWV2521728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a44cd5bc086388825a295ceca7932517420c96292c7a1dd526ac16a01580f3. 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/CACWV2521721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2707dc076fc31acca75000d5790b2015daaee90fe96c47ed56c656b2d20a7bb4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:28:13Z), 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/CACWV2521527.