Leroy Eliot "Slam" Stewart (September 21, 1914 – December 10, 1987) was an American jazz double-bass player whose trademark style was his ability to bow the bass (arco) and simultaneously hum or sing
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 0x124325b5cd4c344f03de8dfff7e938c1a982c5297a3f3b55b5862abc04c8fa34. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa4e228f-4496-4d34-a151-259b11a83588.json and https://artists.proofprofile.net/proofs/artist/fa4e228f-4496-4d34-a151-259b11a83588.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 0x2087506a44e6b5f577572460b5ba4d5352aad5c9e799a01310f9b8ee8ddb6471. 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/USSJ10001007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331243a025f01bf53d9770af9fad1f1ee967b67ffa92b5c1d0fd60725843e03c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USSJ10001008.
Slam Bam (Hérouville, France, 1971) [The Definitive Black & Blue Sessions]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ac207ae7aa6dcf247eca1d771c89411388a2ffe414abdad757c959e695f334. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR6V87100154.
Slamboree (New York City, 1972) [The Definitive Black & Blue Sessions]
Stewart, Slam / Major Holley: Shut Yo' Mouth! Featuring Dick Hyman and Oliver Jackson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192a4f38bb09d86067c1d799bfa44feaa61369b22ef739a2a6af99d6e22dc023. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USASX0692401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae28b89f133086c9057e3d9a8b04fa68b8aa007eb630b4e3b1815949ada18f5. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/USASX0692402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38fa8e3b493ed19823841d1dee217e4e519cde3cbc085679a1caa7c87711845. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:30:38Z), 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/USASX0692403.
Fish Scales (Paris 1975) [The Definitive Black & Blue Sessions]
Beyond Patina Jazz Masters: Slam Stewart
All that Jazz, Vol. 142: Wizard on the Keys
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc040b82df48b073367676116dbbae0491d6a368204ec69501e71e468a9785071. 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/DEL112102198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32b6c23dba79d0196348ba3a26f914367efbca42c5b9eb512e5e9ce2d6f5180. 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/DEL112102192.
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
Murder at the Vanities: Cocktails for Two
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b1dc7710db7d5c71fec7907ef7bc83cbbcccf1fa3f5dfc1a1533187cb2984f. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/DEL112102195.