1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xa826dcbfc1bc853829e33d697cf7788530ff4eb354c07c840e457a593b8f174d. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c972248e-0f8b-44ba-8941-9e2c1206d60d.json and https://artists.proofprofile.net/proofs/artist/c972248e-0f8b-44ba-8941-9e2c1206d60d.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 → block OTSBitcoinBlock must exist at that height 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 0x534c5d82d6d27497ac9bc275e7233be8ce461460031d2390e5cf5cea2e1179c5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM21388051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39501084b2825e019d07ac9cfa42dd141ea801c48aa52e4015cfa7f895671dec. 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/USHM21388052.
Antiphona: Natus Est Nobis - Psalmus 111
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf110d5134c55c05e6a021bd1a8b726e1a4853d86cd9c7f37d4bb6dc9a0590cf. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/USHM21388062.
Lectio Cum Tropi: Laudem Deo / Popule Gentium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a91dd0cc92144902705742a2976171ee8aea8eb66dad99af84273bfa92759d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM21388065.
Missa 1: Gloria - Gloria In Excelsis Deo
Missa 1: Gloria - Quoniam Tu Solus Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbc30f4f9da39a7daf86ab3f1a4b68c27378038871c4f351469bcccd02304d4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM91761693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e8efc6ac1e4ad8163db836e0c8f2f010f0ecc143644f59d98bfa6b2d4d9342. 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/USHM91761696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fb600a66215b47a831be98d8f6f357d2bf43c5ad86bfcf0568834bed789e01. 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/USHM91761697.