Delfeayo Ferdinand Marsalis (; born July 28, 1965) is an American jazz trombonist, record producer and educator. Life and career Marsalis was born in New Orleans, the son of Dolores (née Ferdinand)
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 0xa9f7a33e534e2b94233671d036d2fd2e48ba70a3dc7167d4351d08c140f81c00. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd8c43bd-7ec9-4f29-8bad-361627814209.json and https://artists.proofprofile.net/proofs/artist/dd8c43bd-7ec9-4f29-8bad-361627814209.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 0x5399cc9a0af9c01122696465b31d3d7790a0ae69619671dbdbba7d5440a2d19f. 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/USGG22010001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ceb62f89fc0fc8a81ddbd134105d0a78cbd53bb511a4a58ff4bfdfbf426123b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USGG21300007.
Kalamazoo (an Evening with Delfeayo Marsalis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6ba1399a81b129734d55765823c8db524c65a9906f5ea8affa4224529d7d57. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMEU32410871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2843b915ccc2d853ecb5a9b3979aa33589c0b718749a5ade2de73c6f2f4108. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QMEU32410874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf206a03c587157950233c1d9462819a3f71773baf858e83d98d6aad902445068. 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/QMEU32410878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99da0847b8e899273a59784d44735183fbc7f92e2aa5f148af210a0d5bfdf3e. 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/QMEU32410877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca97bda8d5d8a9eea9c0be18211185ef71cde1a9afbc79c18eb69576dcad1692. 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/QMEU32410875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3b661b5f46866a7728160022e704b16fb69da75fb1001d5358500a4b6d9147. 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/QMEU32410883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22525bba9e5b077fdbcb0049a8d1112bf8e26b6ec0ce5759759119e255f0c8b. 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/QMEU32410880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e25eca958d9145a59a39465c4980130ca5a1d0deccd3a480d6cc84424517a4. 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/QMEU32410882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198914396e024c4247c05532c2b1d5794ee59f89a4799e2b459b8163a51a6f48. 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/QMEU32410884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11474f937047eb1910c608c403867bacc907d63f354cddb2ad47f06c41275c51. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QMEU32410876.
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 0x975ee44e5e21d04da846684828b43bd13f08dc51d1115aa27065d45b8925a878. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QMEU32410872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e4dcde3a72ea057423be12af241dbfc69c76ca283e145f88c23bec2eacb150. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QMEU32410873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f82948e792a8d512fe014eca869551db6c413111dda3bb880e5003e521cac6. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QMEU32410879.
I Wish I Knew How It Would Feel to Be Free
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271dad039075e2e9b0ccf3f2805dffa0041b0a62eed1b7431b6bb9b8158367cf. 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/QMEU32410881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620160e9f7e649b60a3def21d4e98e92ddf9b7cd77e6ff2bfb07de5a3163170e. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QMEU32410886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc87ad60629837d7c5100fdefe0c0faa6696eec9f6cd927ea58930a1786a9a1a. 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/USSM19908301.