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 0x716735da6b8dfb98debef04f0daf49eeb07e0432924c001df14893ff69900ef5. 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/429c82e4-7ac0-4440-b83d-0842abee6684.json and https://artists.proofprofile.net/proofs/artist/429c82e4-7ac0-4440-b83d-0842abee6684.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 0x5da9c9ce0138bf64fdb64e0a3f64117ac9afe429ea2d50d966c2f0253770777f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEQN42200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264c6541de060218eb11be0eb53faef241648f0a26388bedba5b4f58050f2542. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEQN42200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5efed4a754c7186ae86d90e791b29bc2516e89efc3b7cbba42885ecce2a1ae3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEQN42200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329bd6a7e6cb6da756b0848ad20c43d7c34531dfe2a1ed02f28aea70d3399e44. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEQN42200077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdfecc1208c11fc4d68604e7e0ca439ca85b7c6a01b3bedc9b91f4eae99f3fe. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEQN42200078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1b518cfefe2411cb2aa339a71f7002e2f879eb2b51483e66ed9fbe5ccf91bb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEQN42200079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabfe95a576a8da0018ecbf1d5999e722530fc9a39da85b487dac272b7ef1b6c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEQN42200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382226528e6b49495dafad575af6b0def3f396c839681918b8d847385bf9105d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEQN42200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46195352acd58359868266400b53261d8eeb9d118aaa4ccfc74ea31f47f25e10. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEQN42200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6790d05f7f390bcd72fa983a5b8ad1badec5b92b1869440ca7c72e8ac197f7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMFME1304714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb70ec386af9c02b211b630fa8e7b9bf6d302aef250f316780c96643dda25fa7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFME1304715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecee5c61f9723bf1605e2db0f106bd7b66acf7d99a0ca746ebc30c74d14cd42f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFME1304716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa91a95ee5946405e834065fed5d2af35c56822b571456255cb4a249e2703b6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFME1304717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd8eec9fdbd923947ed887ad9845b2b8f364e72e70ac3dce9c81ced21473706. 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/DEQN42200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdef4fb166d0bd47d1814f001569ed9d1ca32098093e72ffe865953bec061126. 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/DEQN42200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a66ba9d3441a9d155b867236646eb0c3dee6220f0d4bf5d5ffd6cdb2a2bd14. 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/DEQN42200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cbcc9069c293b2ca6f5d2cccc7de1bf8e07332b9ec74f3a73fcdb5b43c286c. 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/DEQN42200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b925670ea04e7d8d1b839021883ed9bee46bcd1fa3afaab55fff52be8b388c. 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/DEQN42200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e299980eb248951d4acbf283552daec6f92dd4d96a407b34f74ff2800d4c20. 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/DEQN42200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3830912e1cd02b6bacaa496bff0266ee536cb7ca5ba639d99905f7c2d540cae. 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/DEQN42200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee1d9cecaba5db9cbb9dd7c07b3153253755ca7d252058ac02fe91a1231312b. 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/DEQN42200052.