Steffen Thum (born 8 June 1988) is a German composer for film, TV, games and advertising, based in Berlin. He is known for his work on the Netflix Original film The Old Guard 2, Paramount Pictures' Cr
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 0xae7e2b4c7da1de9209a7706d22fba838abcbb3a78e4cdaa6c07469c5cd18bd89. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67d95568-216a-49d8-8b34-653048923908.json and https://artists.proofprofile.net/proofs/artist/67d95568-216a-49d8-8b34-653048923908.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Revenge (Main Theme) (from ”Stockholm Bloodbath”)
Blodsystrar (from ”Stockholm Bloodbath”)
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 0x9c9bbfed6cc8822736d9a47ddbf5e09cf05c0eedbc1ad468461c14de2e1b02be. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZEC2312061.
Didrik and the Boys (from ”Stockholm Bloodbath”)
Stockholm Bloodbath (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9bbfed6cc8822736d9a47ddbf5e09cf05c0eedbc1ad468461c14de2e1b02be. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZEC2312061.
All the Right Questions (From ”Slingshot”)
The Titan Mission (Main Theme) (from ”Slingshot”)
Slingshot (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5050badae52b0bf58711f85ee5b3e352ea5e820b6de6fba7956225270dedbec0. 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/QZWV32451066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e50af6b7f0f8f637d5b439d818c7a997a49b4543f3169464b8535268596732. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWV32451073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4db31c55aaee5757bf1b272bb3b9969f0d325671dd3298cb4b21a49c280cf8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWV32439702.