Martyn Jerel Buchwald (January 30, 1942 – September 27, 2018), known as Marty Balin (), was an American singer, songwriter, and musician best known as a member of Jefferson Airplane and Jefferson Star
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 0x873a5fcf8d8a1971e951add0c8039bae6369c9ac8c35df64ee53808d7e1e4542. 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/625a9589-00e7-4b42-bf1c-009c136c5b42.json and https://artists.proofprofile.net/proofs/artist/625a9589-00e7-4b42-bf1c-009c136c5b42.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 0x6161cbb9bc8c98b2a27d1a5a6c5fb0f296f48283503cc56de292219e344fda41. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/USCA20703338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fefaea9ca5eb3fbb184bbca4bfe7cb92e79bfb6a7f1326b3c1bc82891ef4f2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCA20703339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ce9fab4b4c6d65d79c4b34bd9f2a1918ac1d7875d261fad64895012542df37. 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/USCA20703344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa858253ec27fcb0b6a89739f4df0ce06f81a853fd5ff2ecb3f275a780cd81a7d. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/USCA20703345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b67f3c7c072ec1707c71837af4ce265de48f49e4b8cba6765279620a63bd9d5. 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/USA370343953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0f612592c3355ef46542b3f66f5c6cbc327e372db23c94e97e855e3ef6cb5d. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USA370343960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818e9dd04deda9c71b4fec96dc1629fe0f71527097015fa94706a06ff1d111ba. 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/USRZ50810001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03ed27a22dfe25b7ff0d9dbc5779d52f65fd4274ad0a2ad4a15849ce7706ecf. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USRZ50810007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b1fb940a4f046f6e7488b2bff7f0ee68cf196dbd3b00ee2a00b4e466ca638d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USEM38900290.
15 Vocalists Who Deserved To Be Superstars
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63ff701432e6e20e8dfce0a468f0e62840b6557a0c7690a3420ac6f34dc0563. 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/USRZ50810003.