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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a3eb5fccede57e6323a8d3698cca7543ceb30e3d17d3aeb6f2e26d27ab0fa7. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e63a8b3b-1455-449d-a851-d12515f048a7.json and https://artists.proofprofile.net/proofs/artist/e63a8b3b-1455-449d-a851-d12515f048a7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5eefbcaa71fc58b8d0fec9050e1bd710baae16d66d7fe338556803912e5e3f. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:16:55Z), 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/QZN882276905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b59cdac061510964e51cf945c77e532ea763a955e0c72a74b99098d81cc66f9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/IEWNY2493148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520b21acfc1012504e88c950f8ff9ce951cb91690375f08c369debdaa5fac553. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:24:49Z), 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/QZWDW2332061.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220cef89f912300c4c081e31453a2590cd617f89e408a065bda73f48f5ba973e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ662301659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456ab56788e0aff2e2dc1f0a2c56a32f7396c25010618107048c554fae22b97a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:02:48Z), 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/QZWDW2462769.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b24a64a056fe996ace11ac92789c2f7dbcc4848a689c0bcfda8db2bad0b559. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZWDW2474466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb269c5294dcfc042bec95678110b382ad9c39ea0274cea3e03573bb9ba0e355e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZWDW2476541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f05fa110678aa843e7276f0a3fc65a4b0b9f962bae4b0ee1b04d48156ba6ab4. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZN882419871.