{{Infobox person | name = Walt Dohrn | image = Walt Dohrn.jpg | caption = Dohrn in 2023 | birth_name = Walter Dohrn | birth_date = | alma_mater = CalArts | occupation = | years_active = 1994–present
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 0x0ec88951cf48d566b2b4d367499e462c7fb407dcf34680eac77ddbd065cdfb62. 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/4eb5eabd-f374-4dac-ab24-344ff7255c9b.json and https://artists.proofprofile.net/proofs/artist/4eb5eabd-f374-4dac-ab24-344ff7255c9b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
TROLLS World Tour (Original Motion Picture Soundtrack)
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 0x2eb7c4577f8842df0a606c4e83da6d6f6880dfc5183fc219c9bada5f30e6f54e. 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/USRC11903603.
Move Your Feet / D.A.N.C.E. / It's A Sunshine Day
TROLLS (Original Motion Picture Soundtrack) [Deutsche Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36d7f919525f2bb3b030488b5b2e9fea13a6b846c02e22a12eb21884baa75fd. 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/USRC11601592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5498c7ea38a0d8c8c3d4c1f5b5e5aa317b94f396a1c5d9f9ba3878518dea4a07. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USRC11601596.