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 0xd8319417a0ee0f5fe6fcd006cbb6f9a5ac0095a9c8e1f68a8416f84192bffe19. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36000c9a-3c93-4f1b-bfe2-f65daa8557bc.json and https://artists.proofprofile.net/proofs/artist/36000c9a-3c93-4f1b-bfe2-f65daa8557bc.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 0x42d78159cff9be646dc71b1da621367061a360846399b531daff53edaedcabf0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN72336849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5013cb02cff95ef7ebf9ff5014d81ab40320ef7afc61d9253323b639837b75. 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/QZHN72366064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9433894036befe8ec56536123ff4cfb8c7b12a71a6c60f96ac8d7adfaea52827. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZHN72373467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1efdc240c684d41f7936db8c04e901a925cd22101d447a8f2b4ca72476f3ec0. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZNWU2306030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826f5b23c283e80c21769840bd6e0dbf273da05e31282943acefa5c82e22a16a. 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/QZWFN2329024.
Darmo ma mamičko, Spoznala som muzikanta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c46d23312bb7bb24983772d247a12996cb31f9def640817622a8f1514d6ff1. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZFZ32578573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76ad12ea9b3c6f7398eecfe9070335e429b23b4b1e70c4b5586ba82b98fae18. 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/QZES72527027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1e4541cff4e1a6f2baaab66e4519ad1cbe53695fdf47c10c345f86ce24e135. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:18:31Z), 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/QZTAT2503944.