thumb|David Grubbs live in 1985 with Squirrel Bait David Grubbs (born September 21, 1967) is an American composer, guitarist, pianist, and vocalist. He was a founding member of Squirrel Bait, Bastro,
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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4ae5e2bb3ae67c9dc94975f9ae559d48220e5f61a5de244342e319368b17da. 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/3c65be59-f212-4bce-9554-734ed4ac821d.json and https://artists.proofprofile.net/proofs/artist/3c65be59-f212-4bce-9554-734ed4ac821d.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddab6f58b86018d0c32be78c5cb99b39e3800f417ceccc48c95d0b94b828799. 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/US58L0518602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324e8364e560aec8976a3d7b3959e6241741a0fdbaec7db781296b2ed7c93055. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/US58L0518603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7683ec7db6651abf9b0d774cf7ab8e1bd61233ea868b03e86477d69dacac46e3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US58L0522409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1f213331910c8e1beb68e544659fd0f91f42b74d471f6e80c6a502e249345f. 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/QM4WV1701307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1ecc7ea6a876a45c66bc7aea7865b64e8e432fe7f0fe7f464bf77fe7153cdf. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/US58L2594107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2dd5347224956031b227fd08a33cb18d676c9a6347bcb24fff328106c48777. 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/US58L2594102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c89f86ac95a817401dc2391e8adee0847a737a76f7f3eb54882b0561c632d8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US58L2594103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbf3e99416f6f3c65e9b3d8422671382357e86c3d735e0ff58ec668fe8642e0. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/US58L2594105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7b14f9525527054fe95b0415142cc80fedfff8b22dfc06f64379666cb4cf41. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US58L2594106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1ecc7ea6a876a45c66bc7aea7865b64e8e432fe7f0fe7f464bf77fe7153cdf. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/US58L2594107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eef3c0ca115bb5de98d50566e6cf5865304b15424bbd3c3ecba907610f2e698. 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/US58L2594108.
The Night of Santiago (feat. David Grubbs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7ae22a7e736034d14b1af04f4e38bb08523be51bb2145281dfe95826d83abd. 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/US58L2080316.