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 0x468cd862531ed258a5722507cb457905970e149918a213615533437abac68f26. 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/cba5e690-4001-45fb-91f0-485ba772baa4.json and https://artists.proofprofile.net/proofs/artist/cba5e690-4001-45fb-91f0-485ba772baa4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
En Vivo Con ServandoZl, Vol. 1 (En vivo)
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 0x97c9ec850bcb431acf9b19c66386ea56852acce1c1c859991afeefdfc79a1b22. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZDA51922024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ef2ff6041e3f76b146ebf2471643761acd0873744e6cb44e463f8fa2d51271. 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/USANG2072914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666fd9537c12af4fd6a77bef919e3bf47029704b711f8820caec4922829a9f7b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US3DF2139712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7181f63e34dad3e3c294c4294043258e5a8f4f2d544ad7df6e1f5dfd41b1c5. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/US3DF2191504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3919e23cb04f4e7936daceb88b6635a45d7cdf6cb0494c6dab005328d0a45c88. 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/US3DF2191505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971806f802a40a07d4dc6de33f452393d7a04e3e0e553b4a21d0aea2468bf34a. 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/US3DF2191506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940770a13e1fe86de63f5795d0a3b6e629465a263571898cfc49854ff8a9f4f9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US3DF2191514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335b16ecf692372c296b6ded4a0a9da3bddea775f0850eb0056c5410230a164f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US3DF2191515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7052030410f21a53e04f29c5eeba9121ea58d6cc9092142e6b4c24fc02fb4b. 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/US3DF2191517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696f80eae019c28756b250c6425f8bbd4d0a21252884158b57951e8969922272. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/US3DF2191518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af61cfd53737ad8c97b2b0e1e2a86d56daadb32600499aa5eeb23bbcbfafbe4. 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/US3DF2209848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1c879bbe43e0ae3389fac552df9ab0650a84f30b47a99eeca2a8a81ab91578. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/US3DF2140120.