Jason Randolph Scheff (born April 16, 1962) is an American bassist, singer, and songwriter who was a frontman for the American rock band Chicago from 1985 to 2016. Replacing former lead vocalist Peter
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 0x62e2947f69135761a3abbc60ddaf3a64ad5b862e6f73169325d71a96d9894a2f. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1f9d14c-95aa-4bed-844a-da926c8bf77e.json and https://artists.proofprofile.net/proofs/artist/d1f9d14c-95aa-4bed-844a-da926c8bf77e.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 0x5394acd11b930d5c6d419a477428bcd5e591f3d334c4965ef30cd16aff3c38d2. 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/QMF921950226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885c960f0a77e3c96e8efaa4072b00180a63c82310e5e17bdb19e407216f589e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QMF921950228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4bb73cfe5ef5df92610a5611f6a3506b4c0bfa6878d2ffa8581dfd51b5fecb. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:29:10Z), 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/QMF921950229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aded8b405fae448f8f9fd44c4f198b82f1979b75ebc84687321e68a89c4775c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:22:58Z), 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/QMF921950234.
Have Yourself A Merry Little Christmas (feat. Jason Scheff)
Dionne Warwick & The Voices of Christmas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596f92b3dc21cf5e0679fc46cb4afd5d086da748e1e0227b342b4aa006674b85. 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/QMRSZ1901728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b4b7fec7043bbcf7124eac7e5e6e3c75e558ffc646973d5390e3bca19e63e6. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USA560673097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42d7e1b000bbc761de7c7f8643aba5ba047d0d969a6e0b19bd523ef55b5b896. 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/QM6MZ2063163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb6e06a1afe064afdfba1339e32b8cbf4f9b37d79e76c71e531326333830712. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SEVVF2401402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63d9e4a14b720af07016522eea91fa6b2c13424b7e32e5e4f3acc2d2345b240. 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/SEVVF2300501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63d9e4a14b720af07016522eea91fa6b2c13424b7e32e5e4f3acc2d2345b240. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEVVF2300501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7421029858308d9dbd1257dd7221c75a45bb9601d21939ca959f197b280a9031. 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/US4R30602421.
Out of the Blue (feat. Trent Gardner & Jason Scheff)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91e9003ac028d753f057b0a213d1f27761740a55989412bdb7e14285f400bd2. 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/USE2A1000955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe66feca1371d1e642202c31bde0a5644e0c9de3f7cd1976aad77084cac6654. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM7281902300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97755ee9a0c32e35666b783ba1923e602102febb6c178c3e31f1364d63837dea. 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/QM7281902316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc477f55e08fbf45ddccb5d905dde3116333ff211cdf9a01afa7e53ffd4d9a51. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9W12102755.
Soul Beat (feat. Hot Caramel, Joseph Williams of Toto, Jason Scheff of Chicago & Joe Pizullo of Sergio Mendes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50aec390ac02f2ba4b17518ed8740d54a599e2539f6a7ec4f32f39c3c765c086. 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/USCGH1185937.
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
An All Star Lineup Performing the Songs of Pink Floyd
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f297e2bb4c51f92bea7cef5d9f4a31976996e5a8bdb6bb7d7b4a160545feca0. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USA370505400.