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 0x13734b3bfc473920abfcce7d418d9a12c38f6f2cd4c4cb764972dc2ad337553b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aafb3254-1a33-4b19-8f1b-876a36077f74.json and https://artists.proofprofile.net/proofs/artist/aafb3254-1a33-4b19-8f1b-876a36077f74.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 0xa2823001097d9aa6cc2b6d93a5990d684047670c1286dc4a55d3035616fd42a0. 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/QZZ7S2433723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e67b14532285ac9f901f99960f6f0561f66f8f07ae033443d4609bf47110553. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZDA52572479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3b1f1a4796e8faacaab0df1b7a591191aa51fb27058fd87318f434ae1fe1d6. 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/QZDA52525355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb537dbfd63dbf111650751aefdd6d53a1cda865cf4cac7f270e08ebc215f29. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:10:02Z), 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/QZZ7Q2568096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1787cb9a8534d14f42c93acb780edd7edc7d8cb104f6f2e6b63f8785c8ad811. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7Q2521053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dd1bd23ee66a8ff7bcbea3bf76672a821dd57b387d74fb82fa743ed59a8e22. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ7Q2518442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7a283f8f3a7703f2c5dd73574722a79a3743a685a50d9c0f18d2dfb8acb180. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZZ7Q2564871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930acdfcbe13b582e332302671ae684c3103a4d2bd9d643ba8b7b65c5821c548. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:47:02Z), 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/QZZ7Q2570672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52295c7cfe179d110d94efa13763227f8906264c728b199278d955f7520dfe9d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:14:32Z), 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/QZZ7Q2568093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee30403b634c43a9af5d5d1b88c3e28721faa845dbf71ba55b3b440ebb35735. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ7Q2521073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e86592863b4a541abec42f2847d2eace793ebecc949fbbeca203f150016bd5. 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/QZZ7Q2561450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b5762d7b3c6711e2d030d35c92cb73c1b94f30cd9fe620c9e242a1610728a5. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:05:17Z), 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/QZZ7Q2564947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab1db395f07b39e64f7c8d77a62f07f40168c7d15fb5ae6c3d4882e613c8ec8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ7Q2521006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b60b83b6a73f422a3178553eb5e678e00919c76387c67a62e8ebf770d44d5c. 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/QZZ7Q2570719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587e70d32ccba5513e38212eb48c4384a9e28dd1b90f4c38c64276f403ac4469. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZZ7R2531371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21bcfe1bacdd901e6f46f1fda0d2afe6014d015ea2ec83df09fc7aca8552a22. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ7R2533648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3d0200361919ace6a7450d54830490f14a186ac34f14862722919bf9a40579. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:40:32Z), 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/QZZ7R2561572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36050b432bbaab30ae1b46a2fc27a33b79dfbe3f7ca3e2a030961a10336c49bc. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ7W2507769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b432a179baa7c6429391cef960c5f3ed8be90e79f78a9681253ba75b6f0a238. 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/QT3EZ2539603.