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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec58cf61b7c148ab789a147b074c09e8aea2d0de8ae0bd20c0e269aa463969b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d85124a1-5b79-4eda-8006-a4e88b641cc5.json and https://artists.proofprofile.net/proofs/artist/d85124a1-5b79-4eda-8006-a4e88b641cc5.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f74a19ecbea44c0596b4ce040cd93b8b8544b5a3b52c82de0432029e504fc3a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:41:08Z), 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/FR10S1416973.
Há Quanto Tempo (Quando Me Dizes Que Me Amas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455658e92b3d0e3e306a807fbdfdc900f27d5a2306069308e181fa5ce54cace2. 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/FR10S1416977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68f753fae46cd97e1160a0149082aaa13c5747c5e2241bd6c6f9ca867172a75. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FR10S1417203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e38666dbcff4f26882082965d5a8511fd4d6f145abed8c840ecce3db6b613ac. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:49:54Z), 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/USA371616715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac05d66f82cf04a68b8bcc497c6171114c444b3939fb126bb9ca98e3e8ca6ec. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USA371616717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3255f70d3301016055560e7d3f2b5e9216647f1ec3a6cf4aaedfc1c817eddabd. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USA371661830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6de9a35c7d8638a4e52d8430e65c4e8136a4fdfb8b4e86f4d461c9311c210e. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QMFME1389200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf51fbda89eb1419c1cc67738704efdb1c330354ef8c2d710b14c63269386b7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:18:01Z), 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/PT2EO2400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ae79fe797bb87fb33bbfbdae087d8c3a6eee183699e1e4bc8da0440ba7ceaa. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PT2EO2400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95594f53f81de369a704e2ed84fd8b704d9b59c9e5f671f1ee098fb6ce9ce25. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PT2EO2400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540ea6f11998a597af9980935b938d37f841d00fd7b91f28c543d573c7574fbe. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/PT2EO2500088.