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 0x7cea18a0f7915ae4fb46b42d6c65d18a6cceaa7814c95c70fc64fb50ece16aec. 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/25609bc5-559c-455c-95a4-cde21aa75d9f.json and https://artists.proofprofile.net/proofs/artist/25609bc5-559c-455c-95a4-cde21aa75d9f.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 0x9e64665e0ac8d0c3e4dfb1a2d78571e46d75885b924b2532927d6c541dcff07a. 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/US39N1900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4391a15ddbd14a84739abfdea981b6ba6c02392517aca052e3ca1342f710c817. 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/USAS11900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0c74caea8ba85f6db213ab512fb3353b00f662dda476ae41cca61b6f33b6f3. 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/US39N1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e64665e0ac8d0c3e4dfb1a2d78571e46d75885b924b2532927d6c541dcff07a. 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/US39N1900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ae9a60866d31feceebf1ebc106332dbd364ba147b9801cb72dae846e182e77. 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/QM24S1701090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7d1e54016cf783c149c868e6e813a928620cbd6923fd70f22ad63d636112be. 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/QM24S1701093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949a79be4b6f6f8f7b1a161c8349f521bbf6be4e981372ad1fca638b3738092c. 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/QM24S1701094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026f323b81ea2b3c76ee728f240f20bac605bb7888f27c59b5b32ba0071f98d6. 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/QM24S1701096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934564badf5952ad53cf8c760343188f5930df9e580dce36c436fd37fca7eabc. 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/QM24S1701097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ccda7c923b795978ef5b3d9a3482e4a479643fb6ddf7230542432b4fbab4b8. 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/QM24S1701098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddb442745d4481cc9202423a72b7b3b6db59723537a16456044e6475e41807a. 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/QM24S1701099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5a0abce84b3562d73af724eff09d809ff763fc51e0180fe91e5f8915d4512f. 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/USUYG1098594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd17dcc277170b7ce4d5838b43f556433cd1e68e421f827db94296076317fa0. 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/USUYG1098597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5967eea5c8aa13a2cf6a62e3c2938b22dc0b939e1a28d9a4e3ff98b3872af8. 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/USUYG1098598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c148c42159de42d6e6c7d5298d8538e63e8121bfaffc92c146c8aae0a4b671e. 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/QM24S1702641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab20e74d4733f0c92e4108dc9acee2eef836ee7d06f0349a3151c6ff05caa71. 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/QM8DG1702052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e7dd2b4a1829da30e135241ac8ccab09f11e07e8820a66665c23da8aa2b168. 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/QM8DG1615080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc043723171e8e6c44c817fca9281b0aa9cd7157ec0f36a7be2ddfd9261fccd. 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/USUYG1098399.