Chris Vrenna (born February 23, 1967) is an American musician, producer, engineer, remixer, programmer, and founder of the electronic band Tweaker. Vrenna played drums for the industrial rock band Nin
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 0xb9f0f0052c74f4fbfe1e0367f1d9d086f0deefa802dcf6651bf558ce1e2faa46. 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/fb85da65-c989-4ed1-af13-8e4ce81cc3e5.json and https://artists.proofprofile.net/proofs/artist/fb85da65-c989-4ed1-af13-8e4ce81cc3e5.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 0xd8e06810f63a2275c9891ce6f3ccb88f9e85a837eaea18a8afb366a799c0a50c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US6DR0100159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9928b33395d1a5ccac1f6f17f3078b9941cb9b32ae1c42699a1ce6a9a75b158. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:51:43Z), 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/US6DR0100162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e597db061d73b3680caeb00c7b1cb4fbf9a58ef7a1ecb27836683eaf2900f3b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US6DR0100164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812845ecdbde926fe15bc4d0638466ad9abb960d51f45b8484bdb9c12b2481e6. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/US6DR0100165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3fa5e95edde06664480b9f1fe2a5150acb090448c342fa4e232b7268a4cdab. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US6DR0100166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de5e7aa6d26f824da9cb09552277c5d48db45ec6655e36a34ab0d894f927b3b. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:56:11Z), 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/US6DR0100167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee23b5bec1f494870cc336065764833e68aaa7c83138c7e1a962b82a9fc0d6f. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:19:08Z), 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/US6DR0100169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89072633706da8cd40b6f80f9b8441669515f3cc4a90c3b7def5faae94c2d60e. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/US6DR0100170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388eec038df5e74f690c4c8df3634012f07d677b166a6abafbdf27935e5ac5bf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US6DR0100171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8cca7d2a150203c4c63902e5057d78038b7de790301a0663c8853936e3224c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US6DR0100172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836e1f6b481daa46836f4d44f5a4a42663c6fdb8640b3210c7c2f6f324bb4518. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/US6DR0100174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf7641fc8f29d8fe8a4aff0caa9a7f07bc0fbc72ee1271881fb31e3e5b1bfc5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US6DR0100175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee07be686489389da6bc39efe22220755551d095ff7b93a6b4da8a0a5d694c3. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/US6DR0100176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe44aa8b2c1b88967f22aea16d1b5295385d8ea24a10205c2d958a3a01400346. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/US6DR0100177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31450eee2bc0171222be7e4efa543c318f0617c426e6eb1fe8ab19d1fb8a9972. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/US6DR0100178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492a5eeb771a26f57907888f62c9aba953c3d37a8959994b293fb8e195f13dd0. 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/USAR10201070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fe21714cbf4ecce75fe1c67f1ecec43e2f8d281da9c53418d00d335369a925. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2133827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7903e4b48df3510006b283db384b5c4baff3f51e119408c55de9f24158e0f6d. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USA370680777.
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
The Grind - Chris Vrenna's Grind Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030230e84768cf2c39c430b6fcd6d8f221cf4465e9f9c9fd9011e756eb069f9e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZNWZ2300690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed630e9a33ddaf13c45db6885df62bf93c0d1333c3245b312376c44572a1e4bd. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QM6MZ2197066.