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 0xeac43ca249d1f484a19ec01e080599946a67534bd10bb57a6446ae8500c948d5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea304cb1-a59b-4f0b-a827-ddaf68cad416.json and https://artists.proofprofile.net/proofs/artist/ea304cb1-a59b-4f0b-a827-ddaf68cad416.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296632d43c0f81dda69f680701e30ea63973c7eef9fb17a4b3c55d5778dff702. 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/MX2832309259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e95c9297e682c5780fd3565b6a07b7ad7a03e1f7e39143d118733ab7e6103e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/MX2832312875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3193264d29fceb8c3a1d3daf68750dccd295e71053f765d297028273906bb1. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/MX2832317851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e93dd5a7cb77fa7b28fa41a32955d3ad7cb0c29b9361360c9044175930790c9. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T19:07:28Z), 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/QZW9K2303031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4b7bd376367b984d3e1dc547ecb134dc78c2adaebb79125eec036a3393e655. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:36:59Z), 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/SE6QE2482673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4550f2b62912997c89a4e49634104578ba08b6b54a01afdfb38ed430f155987. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE6QE2482675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cb167896aaa318fc44833fda2678ff8b04706772339b75d947570a69c4fe00. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE5BU2575445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617b8687a52123994d0add59bb1bc59ed4f31d43c6848bd0c165ff752ac83390. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6SA2488205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cd2012538c8fd0756a831077b54d52891942f6bf0d09bd084fdf83125f6334. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SE5BU2575446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc7ec522679080fca359a289e037c7749af7cbd42231334769fc6602fa09cfc. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SE6XY2527239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe464bf572c774cfd8f0d61c2e347c043a11a944ba9e829106dd8db32ffa70d79. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE6XY2566961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fc628f7918a9104f35d465005e61e01a117e8156ba35670a2b0ad884c21c2b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBLFP2512302.