Robert Sadin is an American jazz musician, conductor, arranger, composer and producer.JazzTimes, 35, 1-5 p82 2005 "... by Robert Sadin (whose long list of critical and popular accomplishments includes
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 0x22867d1bb8e34810d5dc8307296cb9e3b7113f3baa06c4121fd6a5fcd35cb173. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c32dc66-4f37-4939-bd54-c8e1d8291b2e.json and https://artists.proofprofile.net/proofs/artist/7c32dc66-4f37-4939-bd54-c8e1d8291b2e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vesperae solennes de confessore, K. 339: Laudate Dominum
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 0xb3880de3bacb9d731bb6b0d7b4682f8284e1339c0b765772d235162ead025194. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USSM19504266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b238abdbdd70a18e18d4c30e81640a6eab77115e003bf1b7706d3ab94f8a69e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USSM19504278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891471e535dfd2828c602ad5605ac5d9057b79d0d26310d5fccaa1cb2544b40d. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USSM19504274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b238abdbdd70a18e18d4c30e81640a6eab77115e003bf1b7706d3ab94f8a69e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USSM19504278.
Schlafendes Jesuskind from Mörike-Lieder III, No. 25 - Voice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde13db700187e689713a4dac918e21ef9f9076362418a41dac3749a6eeb2e0c. 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/USSM19504265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3880de3bacb9d731bb6b0d7b4682f8284e1339c0b765772d235162ead025194. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USSM19504266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e8936dcc726af051dc9f72f8aad9a92563b977c8c39c1e7e0e95bb88bbdb07. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USSM19504267.
Seufzer, Tränen, Kummer, Not from Ich hatte viel Bekümmernis, BWV 21 - Voice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec2bf156b2c05dd49fb6261c347b325813e2fe7e25c6b3c455bcd01ba32a18a. 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/USSM19504268.
Schafe können from Was mir behagt, ist nur die muntre Jagd, BWV 208 - Voice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e444e0b020ef82080964ee37134e7716712b441f68edf4a093326298c54e6cb. 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/USSM19504269.
Ave Maria, based on the Intermezzo from Cavalleria Rusticana - Voice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226b9e5accb67d9506ce3da722c200583958d9fbae1a30a7e025fb819ad8908b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USSM19504270.
Laudamus Te from Messa di Gloria - Voice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f233687781588bc1156ce804728cdcdcb0a6c69c26f771f9f770f69c7294cf. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USSM19504271.
Bist du bei mir, BWV 508 (From "Notenbüchlein für Anna Magdelena Bach")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf547d9624b34dda864b3499dee5040260354b6e9f1cb39105dd852a1717abae9. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/USSM19504272.
Mein gläubiges Herze from Also hat Gott die Welt geliebt, BWV 68 - Voice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb385611ff6e5ecb302cdc15b3a449de9a558a0714818dc699a60a4ac8de1ab8e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USSM19504273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891471e535dfd2828c602ad5605ac5d9057b79d0d26310d5fccaa1cb2544b40d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USSM19504274.
Were You There When They Crucified My Lord
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b35b5d69022d2f44ca190dede345ab677ff6d0f1ea1007ecbb2e43aeaec1b6. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USSM19504275.
Flößt, mein Heiland from Weihnachts-Oratorium IV. Teil, BWV 248 - Voice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefcdbe67d34cd19695cc1010cfc54a9eb5aee7581aa18d2a3ea874711efeb5a. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USSM19504276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd65635a6614e8453f1efd9d04c6ddd3ebdcae7260d3e24101d2817483101b35. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USSM19504277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a1b2af660f829238ba8b6e6ed55118649e62115e7e088388dd9ae0ef7dbf10. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/KRA380900527.