David Eric Grohl (; born January 14, 1969) is an American musician. He founded the rock band Foo Fighters, of which he is the lead singer, guitarist, principal songwriter, and only consistent member.
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 0x8e4833d4e1fd198f3d30429f45bab226392b326b7d881d5d667b63db7f01e9e3. 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/4dee2e18-9f8f-4130-b06d-17885b3c520b.json and https://artists.proofprofile.net/proofs/artist/4dee2e18-9f8f-4130-b06d-17885b3c520b.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 0x773a251dc0d2b519e191a11a399d57b64fc4ab8583d015842e2c20daea1bc3c4. 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/CAOA81600120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5ab7f3d4d15c80b068563cc54b47f9ae28074e4bdc4dd412bcc4ecbc73893b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUG11500817.
Razor (with Dave Grohl) (From “Norah Jones is Playing Along” Podcast)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6007faad698a72eb0070925cfd41210d45386c75777f1a0d799aace4a5dd06f1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUM72315920.
Smells Like Teen Spirit (From "Black Widow") - Piano Version
Smells Like Teen Spirit (From "Black Widow") [Piano Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3589eace3fcad3970ed70872f735046d6b771f6c111be934640443990ddcada. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBRKQ2308414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a82f7490c21a75cc64a0f552baaa149684bba51e1c80a2262fa888dfd539e2. 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/ITX951614713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773a251dc0d2b519e191a11a399d57b64fc4ab8583d015842e2c20daea1bc3c4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CAOA81600120.
We Wish You A Metal Xmas And A Headbanging New Year
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1a10737b5060418da92bd25c4e5c7535a2e9ed4a872b810b634cdb2bf818fe. 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/GBCBR0800203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773a251dc0d2b519e191a11a399d57b64fc4ab8583d015842e2c20daea1bc3c4. 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/CAOA81600120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5751878196dab5af6eec399b52743ca06c0e663cbc6db6188906e1eceae82b7. 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/USRW29600012.
Rockin' In The Free World > Machine Gun > Rockin' In The Free World
Warren Haynes Presents: The Benefit Concert, Vol. 20
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b2156a2f8a1d646ef86d2870962f41cbb0a1829dd246bc44208a73e937b79c. 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/NLB932302419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e8661d264241312f7033b4e3d98be2e6bd35d4fdbfa95c0eadfdc5795b435b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLB932302427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d86e9b1590360725ddcb66170d7d8f3fc4b3bb61edac0baa025e1cf9f122b5. 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/NLB932302428.
Smells Like Teen Spirit (Arr. for Harp by Kristan Toczko)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e339079ba89c9d39660d69177879e91e0025862b4a2cd2600ceb30285d2a7a. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/CA4Q32400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb984ada80f77c7029cfa3d02b9e5ed87d9ff5ce1400dd7f62722db7e980e719e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/UKUZW2001007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22870a6c8f0f5a8f64f3c70962c1a2efd5d271df9af08f19a3f1af187beb91d8. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/UKUZW2100133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5654861ce9d9ee752a55a975c5bb640473f3c33c1b21a0168e7f0b5ff3574e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLB932302416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db2adedc623455a20574417ba344074c8866252d5b9690dd34dbacc4ed69981. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/UKUZW2000543.