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 0x4f9036fb724930af417a6d6da2591d0a1776cc5ab67ffcf088e43448271a3381. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fa183b4-a06a-4aba-a478-7c60d909fa07.json and https://artists.proofprofile.net/proofs/artist/6fa183b4-a06a-4aba-a478-7c60d909fa07.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 0x3ebf22354d79288515f7ea93c4d19e5c3bb5010068ef19bafba12d70a9d3f49f. 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/US7VG2476239.
Quarteto de Cordas - Congregação Cristã no Brasil, Vol. 01
Quarteto de Cordas - Congregação Cristã no Brasil, Vol. 02
Quarteto de Cordas - Congregação Cristã no Brasil, Vol. 03
Dá-Me Graça, Senhor - Hino 24 Congregação Cristã no Brasil
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e748914e2d7ce70763dbdceb9d78b54c1055cc3c4dcbb7143b667619d9bc6b7. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:02:37Z), 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/QZNJZ2420910.
Quarteto de Cordas - Congregação Cristã no Brasil, Vol. 04
Forte Rocha - Hino 31 Congregação Cristã no Brasil
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b322f6b56df9dfe1194777c0bbf14328c5dae33154380b485020012192ce238. 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/QZNJZ2435314.