Harold de Vance Land (December 18, 1928 – July 27, 2001) was an American hard bop and post-bop tenor saxophonist. Land developed his hard bop playing with the Max Roach/Clifford Brown band into a pers
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 0x8f5145d9a1d6b62be185cf7bb429ca7e44b056b0e58b1cc42aa11bfdce13a531. 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/22a40afb-30f3-494c-be91-b713762318d8.json and https://artists.proofprofile.net/proofs/artist/22a40afb-30f3-494c-be91-b713762318d8.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 0x7213b4c5be318fb6175939b833c5c45d527c70532d693854e7a051eaf579f795. 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/NLHR52110732.
Happily Dancing / Deep Harmonies Falling - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d7290712205c1ff24b9114dbdfd80adb04c07b49a53705e1943ea4c26d4757. 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/QM6MZ2150964.
Four Classic Albums (Harold in the Land of Jazz / The Fox / West Coast Blues / Eastward Ho! Harold Land in New York) (Digitally Remastered)
The Vinyl Masters: Eastward Ho! In New York
Sweet Valentine's Jazz (Digitally Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa4a4e2b79974a7484df08fdaa71c67fce69f8a60e4374b3b070c9cec60428d. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/GBLGL0922584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d8d1b3e28503592f1d3cf5778bc451501aeb32fc0c70c8a6771cd57c4d9d5a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USTR80302559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b78d90e17ff4913e90c85f03915ee9d5b85c90fd8b0fa83179e8456ee8f3850. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/USTR80302560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298f04586f5c09cb9c6c364b1bc7f393e3410589c9a596457c5f573d65c67b28. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USTR80302561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98daa73d0173a8c5e5d1cfe18d3845aef1db0f472955b52865e313ad45b1e9ec. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USTR80302562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864ad1349706ba2ba19dca90b773ddf65a671825d3cb61bca20449e7853ccf08. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USFI86000328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ed4bd4d6b3a60fa68556dc6e9792c8e4087085103c40bff6e909ed2fb462ee. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USFI86000329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fe5bbe7c40c1f043097e0663be7097cf6af064aa03ae8e0a20e75146b7dc7d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USFI86000330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9377cb61ff8ec25073dd42dd76d7fc6b3c5ef24f45563e67cc415c3bf3f840. 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/USFI86000331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e5dd1254a6803d3dc822308062e85bb13bfadef5d225db6c9b186313d0ccd7. 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/USFI86000332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13363874d118f7a5bc7d304d93a333bdc6eb707b2262e2a93c40ff0c822f48a1. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/USFI86000333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ebfaa5946898b919bb4a73f60b554db82182a6324e9887ddab50bca0f66697. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM4TW2221926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2a35140c59fdc8d62d6ca84ba4fbd23d48495422ab1bb91765a1c2e2fc0fdb. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM4TW2221927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22b0e3b621d81d2700b8663022ae78ea038a81e1996a6020ad9729c96686f5e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM4TW2221928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb34f3dd65b635b06238294c17312faef1a60046133ce9519d75ba83dfca45b. 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/QM4TW2221933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c26aa8a4ef4c1c60def09a7621c93221a6bc6f5cb9815e6385667135c7651f6. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QM4TW2221934.