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 0xfceacc9669f54fc4c69797df07556c0ac59a55a4e60a93d47b98939b02639bd1. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6a9d457-59e4-44ad-8b99-a757cbf4df20.json and https://artists.proofprofile.net/proofs/artist/b6a9d457-59e4-44ad-8b99-a757cbf4df20.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 0x024d66e8c0ed7018a133986e71801cf5907a2ad250c88f5eac8d1c8508a763c7. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:11:58Z), 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/QMBZ92136153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411f63480b21c71b6fa189f4c49ea175e5359855b9c9b73c474b20d1d62984fa. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QMBZ92136154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f4890e58d77771e10b6d258494712120fe115e3aab231cab614494e69ff9c0. 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/QMBZ92136156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbe1eabd589a6466cbe894d7f841e23fdcebfdf86fbe06907c52e48d465ae21. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMBZ92136157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cdc9b29a8dedfea35497bcc094af7f5417eb3e6ff46f8f7f6c003877e1d21f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:14Z), 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/QMBZ92136160.
20 Músicas Nómadas - Uma Colectânea Conventual
Vitral Submerso (música para piano solo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edf8f05d105d51ea99790524852ffd4d1eb6310e9fa35e261569cfb19d9f9d3. 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/QZH5R2000105.