Grant Henry (born April 3, 1979), better known by his stage name Stemage, is an American guitarist and composer. He is known for his video game and television soundtracks, including Cartoon Network's
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 0x0937cf83fdab5d948e4c50a2cd99804466cb11ddf19d286ffdf58ecd343cc1a4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc831217-e8b3-4f84-985d-26f0b32aa22d.json and https://artists.proofprofile.net/proofs/artist/dc831217-e8b3-4f84-985d-26f0b32aa22d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d0bcd348eeefeea0646976147e517970b3f6f5788be3bfc214ab649b7cc0bd. 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/USE830910580.
Where Good Marbles Go to Die (Marble Madness)
Runner3 (The Retro Challenge Soundtrack)
Bubsy: Paws on Fire! (Original Game Soundtrack)
Card of Darkness (Original Game Soundtrack)
Play the Game (Devolver Digital® Cinematic Universe)
Daydream (Devolver Digital Cinematic Universe)
Star Bit Soufflé (from "Super Mario Galaxy")
Singularity (Devolver Digital Cinematic Universe)
Rock Until You Drop (from "Monster Squad")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38007cc0726e8c2d1f27c64377d6e51962f1c07201dbc13de55f56c9a06302e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZPJ32199454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cf5fc2107cd794ebde29d3d7a2b38533c5e77794c67ad2d3d0d95b342e8dde. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USDY41724963.
Katamari On the Rocks (From "Katamari Damacy") [feat. Brentalfloss, Stemage, Under Polaris, Phil Robertson & Amanda Lepre]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840ec4ef2b06535bace764750bde40fbaceac19c71247e1fe5f5184cbab21ad4. 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/USCGH1404412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02bfdd07f41243de32c850a5c29d0ac2db54471ed0ab29791b29d728d6ba451. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USE831537348.
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