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 0x735da8736ca7403a8aafbcbe38ed7d754a71bb0d1561bfff3c397272299171bf. 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/1ab37fa2-ca6b-4c2f-bcb5-d87579e8e84c.json and https://artists.proofprofile.net/proofs/artist/1ab37fa2-ca6b-4c2f-bcb5-d87579e8e84c.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 0x6ec7b661e228105206554f24ff43ace6d0e0082f6d5772cb0f2a7885c5e6c3d7. 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/BXPC12100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8aa5e0f29638bb89dc30c595309b4fbde2193aa833532848ad2236fd455771f. 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/BKLFO2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8124c6f7da8c55e7040ce99b54f2066f9222d28209de725a5bb6fd71edf90c14. 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/BKLFO2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d51632fe6b72f0cd07ad5b305d201373810e5099b150d85233da1151db15c2b. 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/BKLFO2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0f974fb884a2b6d522668760e88478df461684e1cfe152e3479af996d3aaad. 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/BKLFO2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c53c4863e689d6d838b41674ca0a62f96584e1b287a91fad9b5663e8ae838d0. 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/BKLFO2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55335f9bfc8d8a7d1cd2d8f72c052df886d57f8a8d684c3be96a62ff9799136. 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/BKLFO2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f8ade0096f177c24596c566a0657c06039c869c675f380e8becec950069e7c. 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/BKLFO2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5c59322427f50118b35ca0a6816f1a21cb86b830c20a670cbc97c7dce32cda. 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/BKLFO2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb4c1ae7ec32e6a60b486f6de63c77a791ce68f43fff7b848f22cb6fe3683e9. 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/BKLFO2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd327d9403797236f11fd13167ed6ea1dde572ff0f8b55c0ab4e21b0cfd2dd6f2. 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/BKLFO2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6727c1ef33aaf7cfc69fca7616650d10b85604908af2425f7e1c087a20707b06. 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/BKLFO2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a36d77b47fcb8c3ff35e8781ff47e491b3c284923d2ea46b62246a4ea51252f. 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/BKLFO2400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15572e2935042a5ddeeefbab13279d0c5c7a2c18e4932f5d6282ea25913051a0. 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/BKLFO2400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca85db6739a3a6cb551ac938735b0228053a66c2c7039f2948671dc5d83fe6eb. 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/BKLFO2400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154b8b363e477e2d603f3e2732c64e18a04d09cfdc39ce1d76f926dea02bd522. 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/BKLFO2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3275c7fbc45601721fb8a910cf3e4d82331528e1183d0f19b5e72a9412f4009. 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/BKLFO2400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021c4af13fdb2463e261b60c8c1fc580b6d2e4725a22f8d36d59dce06f3e8f88. 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/BKLFO2400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5432a34e2313ea6a8449f0f351aade62f9a17de5f929e9082fd06a6f08156e02. 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/BKLFO2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c15a753925a2bf901a21fb4375ef05ce243f4de101324cc6869f14c41fc47d7. 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/BKLFO2400061.