John Benson Sebastian (born March 17, 1944) is an American singer, songwriter and musician who founded the rock band the Lovin' Spoonful in 1964 with Zal Yanovsky. During his time in the Lovin' Spoonf
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 0x1ffd7ad68f6aa62633934b877c4150a07d5835608c040dc7a9761c7a07318f0f. 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/dec19f81-c93f-4314-8d71-4512fbb085e0.json and https://artists.proofprofile.net/proofs/artist/dec19f81-c93f-4314-8d71-4512fbb085e0.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 0x0644ee77d362dff2cd9bb8dbe2b1bb72247b6ea0f60432d3b56c38e0c501ba97. 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/USRE10700407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07bbb39ed2a2f18a0134ad90853be9c032793da70cae2b3da9218553d24b77f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USRE10700409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a739caeccda1c52e46fb6f9c0c7acc167da345a9db1a51ff585025079ffb46a. 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/USRE10700412.
Cheapo-Cheapo Productions Presents Real Live John Sebastian
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6729a746f374ab55b617c710cb8eff61a6d64ccd90b78fdc85e5944b47934641. 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/USRE10102375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40d380bc1b08e08199524a01e6bae12ab5548b9ff8ee1fa2e47d234efccc165. 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/USRE10102347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dfb9dd50f30b634f41bc045bc55c4ef098ea1d7b48395db238279c6eb3006f. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USRE10102348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b94e1377d41b48ca751a5f8feffbecd78c115da239d664164a5079afccc35b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USRE10102351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc775c691391ba70287efca6a2a8efc3b66d16da490ecbf356086ca8f2e1a3797. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USRE10100597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06c82e9326810514381cff351407032f9a1d973be4163c7dfae794929074970. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/USRE10100599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc460e997dabda2a07648989685a6de45a3f4238295a4b148534c22b2257dbf. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/USRE10102383.
Welcome Back (Theme from Welcome Back, Kotter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb031262e34cbd9f49a759f45d2ff8b8883a3004109f8afe3ab38b25e696406e7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USRE10100601.
John Sebastian and Arlen Roth Explore the Spoonful Songbook
Welcome Back (Theme from "Welcome Back, Kotter")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3504cf54c045b06d1e582c1f26fbe22a2015a4ff3e8a78abc831d0c9165e8bde. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/USRE10700432.
Welcome Back (From "Welcome Back, Kotter")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb031262e34cbd9f49a759f45d2ff8b8883a3004109f8afe3ab38b25e696406e7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USRE10100601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a217cf8c28d7c6117fbfb1f8886438dcdf5feb7b7a30936f7b7ebf13be3f563. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/USRE10102377.
Classic Harmonica Blues from Smithsonian Folkways
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942c9b05669af4c428c2845646754ab1df4882c8bd35297e460616e62c119002. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USSF19808510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa02f3bf340e29e9d26ee92adee2b965c786c7ffd6f8fe293cd8e0091f5fb63. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USCGJ1668130.