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 0xd547d458d9da3ca1bc05c2bca20ed89b37c3aab737bccefdd0e04c5d64d2f839. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16697915-cf78-46b6-931d-1981988f9071.json and https://artists.proofprofile.net/proofs/artist/16697915-cf78-46b6-931d-1981988f9071.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tri boje zvuka (Live at RTS Studio 8, 2016)
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 0x560cd21c498052aaca1513e2d4798cf747ef508b358d1ffa8f2cd1ec0fbe953d. 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/RSZ141700188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762789dbe93e7658fe39f2136b8b761721b6c4589e82912e9edd180104e4e077. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/RSZ141700189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc5a23c462d9581bf0617dbba4f6ccddb9fbbfbcc5b6085d4fcb7eaa59d11f0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/RSZ141700191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e14a9ab493632e1a16b01e64390851d384af04d8597fa005b597b0689cb750. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/RSZ141700200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd0c5f840543685cf299062fdacb6626453418f77b7eef87deb283afac05e64. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/RSZ141700203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cbac33ec1be63fd7f5d1430d93c1e131d66304e4f26fd69e96bea92ce19625. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/RSA3C2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f09dc224ea145d7245978d35db67f5aff57efecd3293b75e5731251c06ee2ba. 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/RSA3C2200030.