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 0x8fa61b4b283d11df24a90f37e220478c1e3cbfd0114a2ece0499db8731fb3325. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8b1cd8d-f5af-462b-8b4f-c88cfffaac8a.json and https://artists.proofprofile.net/proofs/artist/a8b1cd8d-f5af-462b-8b4f-c88cfffaac8a.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 0xb0d9060b75da6ce537384462493f0ec115a39b2b2f0923896b608eb4c697e5d8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3FC2574602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612f33464bb43d02bbade1d24dbfbd09c42e4d81425886c71852ef6e98ee41b1. 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/QT3FD2594833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d263e9591b344e553a7d138f127e113d5f39fe2bc9279f0af15ca16d75855a9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3FF2516127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3819f0e5f33ebe9f9c8a42685a26c35cdda7775fbea604ee581b73bcc52b73d6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3FF2516124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2ab54655530472e4d9d9b1befb3babbb36a84c3aee2f0709350842cf84913e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT3FF2516171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe210ad80c89f4244e020b1947b01e773f0d96308900305e82d7891e2c12b1109. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3FF2582106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6a2343d51fcb52d59187845b1dfc734f8f8464bd324f4092ba071bab6ebf6e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3FF2582143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2b49b58a76d55ffa393bd1fc3f8b20d5e5d4a0977146accfb0d4193624a79e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:19:36Z), 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/QT3FF2582146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8571486f49fdce3860f48e2b4f4b898c64c881f7b558d3b21296f467c1468cd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT3FG2539079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb256358e0ccf76a64954e7c5d1ea8a6f593b4206b6ffbb57a2eff240127a5dba. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT3FH2520085.