thumb|Ambassador Peter Burian with President Bush after presenting his credentials December 3, 2008 Peter Burian (born 21 March 1959) is a Slovak diplomat and the Ambassador at large for human rights.
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 0x535482aa5ee216c3a7e90816189e8a54faa7b4e53673b58aec23b87ad059bdf3. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82a2171c-78cb-4206-a1c7-6027768dd5d9.json and https://artists.proofprofile.net/proofs/artist/82a2171c-78cb-4206-a1c7-6027768dd5d9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Requiem, K. 626 (Ed. Robbins Landon): IIIb. Tuba mirum - Live at Stephansdom, Vienna, 1991
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 0x52cffd506fc35c21f7d5f55116f24f59c9a9eb43dc1b5553523fc77118f9bf48. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBF079140904.
Lohengrin, WWV 75, Act I Scene 1: Hört, Grafen, Edle, Freie von Brabant!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fa837cd0509c1d973943a61fc68fbbb3f62476d947e0683b4305527a3b4bff. 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/DEF059131612.
Lohengrin, WWV 75, Act I Scene 1: Dank, König, dir, daß du zu richten kamst!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631ae51372466d65acde01978132dd329aaf041819b3a4dbfc301d5c209a58f8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEF059131613.
Lohengrin, WWV 75, Act I Scene 2: Seht hin! Sie naht, die hart Beklagte!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d2119a7a463ba3dc3787a9fd326b5baf9ff8d1d2216050d528fbc8746f04ba. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/DEF059131614.
Lohengrin, WWV 75, Act I Scene 2: Einsam in trüben Tagen "Elsa's Dream"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a76b044bdf01e07ef34be25b4d7c11a6d2a8eb941ae9cf143853e3bc54556ae. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEF059131615.
Lohengrin, WWV 75, Act I Scene 2: Des Ritters will ich wahren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa848d9d0f526d1a8ab1a0cc4c825f9ddbfbcb693b46c6d7c30a0b2b82f97ec8f. 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/DEF059131616.
Lohengrin, WWV 75, Act I Scene 2: Ohn' Antwort ist der Ruf verhallt!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da4cf2e023e880e54f6d0de7dd0cbd0ba97ba4c25e99191bfb941026dc1a66c. 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/DEF059131617.
Lohengrin, WWV 75, Act I Scene 3: Durch Gottes Sieg ist jetzt dein Leben mein
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8866f6d7efedc325ecd5137386d4280b92cb18401d5e942915ffd0f1b7aed04. 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/DEF059131622.