Tony Furtado (born October 18, 1967) is an American singer-songwriter, banjoist, and guitarist. History left|thumb|Fox Theater, Boulder, Colorado, February 8, 2008 Furtado was born in Pleasanton, C
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 0x1a1ff2a3d4235da372cf499c590001ba33773cc95186254791c7f11312f402cd. 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/74b3977e-702f-40e9-b4f5-39471aeede17.json and https://artists.proofprofile.net/proofs/artist/74b3977e-702f-40e9-b4f5-39471aeede17.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 0xdc11d0975a159bd01ca27b61b578441aa6f99c9422198250fb324592f03e8390. 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/USRO29229003.
Waiting For Guiteau / President Garfield's Hornpipe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4968d9a2ef9ccbfb2327b755abd9e961965f6fece1848119ae14d3829462b5d. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/USRO29229004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b989a1ff469f76175065287ea9d509ea0a026a5de4d0a0e9c3ea7b880ccdb5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USRO29432308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec588e7e88603ec51c456fde93b8a2f827a1de226700124f0c558d0bccdb861f. 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/USRO29734301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc425db64d70a3ce44894c5d2ee2a946eaedaf510be02884224af7383e36bef. 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/USRO29734302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf571bb8b2520cc7abfaee0f62c23eaebf3ec81cd48ef4b905193548aa581c4. 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/USRO29945601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4373a2e42de27394856e80730250f349686c28d2b1587a7c5fa86d701e06312a. 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/USA6B0306205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f6db4bc32fdfc191d56db10ff78c7cfa8672e99d5a17761d7a44c9cce35466. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/USA3Y0500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198eb2c7ba6bd25c52e740eed37c5628804a118f251a32db1d6df6d6467d935c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USA3Y0600550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b032c6cefac4dc9cc481ab34444426704e41dd65034973341769f6b913f9f7. 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/USA3Y0600559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530459c7836fe9cf15a1d7bc052e3d736049456e080438eaf5baeb60a0b6f7c8. 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/QMEU31503125.
Cider House Sessions (Live at Reverend Nat's)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d7c4dd0b87369ef33d106143c009f23abf89fba551b29aa7b45d95bc248712. 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/QZT262100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7d37b99e9954f94c121cde7635b05f765b61dd6fd9f3d4c332043369e5cb0f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZT262100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edb93ede7f66954cf1e5122f175dda3f38df0de3ab26f1f118b0cb03df23976. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCAJM2573594.
Roll Columbia: Woody Guthrie's 26 Northwest Songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3ca61ee8c47db841a9ce3fecbda8217b34eb3442774901508f7e2b50c51ac5. 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/USSF11622605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc11d0975a159bd01ca27b61b578441aa6f99c9422198250fb324592f03e8390. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRO29229003.