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 0xe57675218c9e4ed17e3b2543205b7ba0316e2b5fd19ce7933baff2a12900be9c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e24ac5a3-f188-45e2-88a5-e45f075a1fba.json and https://artists.proofprofile.net/proofs/artist/e24ac5a3-f188-45e2-88a5-e45f075a1fba.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 0xc4aa0afac6cc78ff82e4161da664a58b64ce8fbe5fbfeaf597528f6b837ad471. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:22:39Z), 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/QZEQU2224363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1282a8693b75a426fc0e0eaaaae41f9425ab81e66a0c7e85d68d3d343d5c637. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5AB2303378.
Ela Faz Horrores [Baile da Argentina - Verão 2023]
No Escurinho nos Fode Fode (feat. Giana Mello)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36628e4c8b5144353312959c1ffdd7def9982ce3438cd35b24f60aba5a87887d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES47F2300261.
Mas Existe um Lugar (feat. Cryzin & Kaio Vianna)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f8075d617ef3cc487ec07a9dd2dda3f737f161b10f366320927dc130ff1805. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES47F2300262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1a0de9276b2635d6f3d7bc8a683e295a650d6dff517b14477e69c3d082850f. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZGLM2477369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f8f6c44810fb3484a29f96af1bf1305fd10813bd0b5d4c7ef82cc6aab7fad9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZGLM2477370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64f2e70a0c1d29065d6b377b1ee6d0487fc5d0b9bb93139da17dff8fd7e88d8. 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/BK4DA2451774.