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 0xae89baec720feb6d6f5900f0386cc4ab02e14c38b1aeb239af50da95785ca2fa. 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/d6f16cb6-3055-4680-acd8-5f9fa7c7d0b5.json and https://artists.proofprofile.net/proofs/artist/d6f16cb6-3055-4680-acd8-5f9fa7c7d0b5.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 0x20558069ba6382477bd645884ad3e8342f29a9b730a8e43951a8c177d493a860. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLFP2334361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af6b28d37ca17961fde8c61f04935e9b36a9dd98ea8147076ba82aa90080ab2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLFP2334362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8e651510a82e4ae13421b214c596b063b5b4c821923435a9f5e5ced31d8614. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLFP2334363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e7e07062bdb663bdb36475059932aacc7083b7ef82d9e89472c677c7d0ccd6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLFP2334364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c6af626bf8d1e81407cc20196ab58b5366fdf2949abbede9d96d3f9a6b92ad. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/GBLFP2334365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4767776d24f91cc8b3a5637a57129b81de2513f1ac1cac234a4c918cce3f0038. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLFP2334360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67964880353cd321d7e436054f5d1b95b3ddd26fd0c69588f8da1ace3712618f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLFP2334366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cbd21afea1f23fb8dd358744ee782411dc65b12fbbf443740edd263c47e53b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKXN22593834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681af9d18d9d393b7c7b1c927cbd1be14ccf30339a9ca2076830c57c6cd08ba1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKXN22306806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda388d064352be958b3573030441a7b70ca2651487b2057fd2a00b99cbdd7fc2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLFP2321006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3176797c53f9686cfeb3ff6a784112535b1caa38d0ee4ef69284c471ef522a4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLFP2321004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39180d23badcf408eec20700163e075d9caf87c8b0e24b9a1afd2ee92e6b2feb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKXN22216102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91aab24be9e58de2a95501a529dd6560f4a9194b817b85ee33d2353287bb6c96. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLFP2276797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf6355d63d10fe67f86a8f6dcfe3a5619a2c38d0a46f1bdf3ca3d25ad14f985. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLFP2255979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68417fdc4f07967a72f64877a9c4f96523e15e3d057b8fb0142e4bb1a96e3089. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:03:35Z), 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/US7VG2201352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69d267d9e65efc11ec09c8d52fc56e7a98dc59631a0ded1e854d445bf4ac4de. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX3Q92025211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab2950f17c91ebf99dfcda23a73b141e112497aa92bdb7b6a670d9d48abd6f6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GX3Q92114154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a63569bc90a72f3e20d5ae371430be53197e69c1937d43b496917305f17b191. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GX3Q92062589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641f1722c5e8891a94bec8e0828ffa0727dd6ce1307e258cef8fbd4df4590e44. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKXN22172715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a527874be256cd51170940600668a426f2ca2b4d8a96034e2372e4b0a3adcc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GX38U2194050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc237c64524d0364211748c0054f4abccbc99ef508eddbbfc78bae14036121a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TW2123683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007b9f3237d813f83dbca546e78b973b73a5e0cd79c8c383f22a49837177d665. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKXN22123722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afef950eb471fbdffe1fdd7673b66a1beb71779287da4fb110709cd749baa63. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TX2403731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1581da48a330a03f8ceef4b3a7c2fe97787fcac22b22eda66bb6f1edd140f221. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFME2434851.