Jan Hammer () (born 17 April 1948) is a Czech-American musician, composer, and record producer. He rose to prominence while playing keyboards with the Mahavishnu Orchestra during the early 1970s, as w
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 0x734465908f18986c8ac2db443b112d476fcaa4864f04bcdc364f419748273f68. 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/19937081-bb64-4b8a-b57e-c216b7f8ae14.json and https://artists.proofprofile.net/proofs/artist/19937081-bb64-4b8a-b57e-c216b7f8ae14.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 0x3faf8813bb350a6f44c846e8df1b6087144ec6e6cf20646d44493e02855695d3. 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/USMC18724487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f84adacab57ab306d902765a8ab394b839800f0e454c1d629c2f82bdbb765f. 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/USMC18724488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba171fae0dee646d3c5b1d8c2047d560590bf4487b1c2f603f5f3e9e777c511. 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/USMC18724489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5dcbfa170498503cf9440ea613d83a58506ffecac764803ac342cd5e107bb5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USMC18724490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565bc5ecf9751835ce73bc07e5244c130788973f0c82e938d5e16dc7534a3fd1. 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/USMC18724491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f38ad3fcb747675576f17170fe7e3033a685c3c5e37608192f181a3b1a30f5d. 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/USMC18724492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ff4da51cd263effae42c906e8f248937d97054d4172017b3a4031ef6930efe. 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/USMC18724493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c8db6090220709ed8a38cb3b047952248ef87c2cf4697cd6ddbf936b57c947. 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/USMC18724494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27dddceeb30d59d51696953986cae954c6853baa020958c5adbecb6f14e348f. 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/USMC18724496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4d3d521a815289c3387ab2321f84a60b16ca95a8546debd6dec3c98f9f30e3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USMC18518657.
The Enja Heritage Collection: Turtles (Live at Domicile Vintage 1968)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771657d36339a14bd80ae14999491ab68309bcee4e6c180fa5bed73065840f70. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USDY41898095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b35696314eca2844e39a24973b82810876115c13d07c1b4b8223ad1027c896. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDY41898096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1684b0c7691590a33c02e60d609b84f99d3033c008878826f22abdc0a29d48b. 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/USDY41898097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbcd32956692b39cf282c6eb4564bfa12c7bd67f786518862d55f9443bd67cd. 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/USDY41898098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e1cb719163c86e6eb0c096da3fcf3eb034b5b8a067e2c262479e83cbba5d34. 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/USDY41898099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ca2e467d737f7f99b14ec12d73e3962662a1b6d463bbba312d878cb8cf91a8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDY41898100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4bb1bfa4555c7788d93c81da49da31b1b08f011346d31c0d272270fc44653a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USDY41898101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b4475ef7d695a20b53a55660b18b23474447785562c0a73d4623bbf9f12790. 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/USDY41898102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3699224425dc61bc55d14562faa1acc956f26f9671d1e53d7d8b91389e51e40. 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/USDY41898103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e1ea9fc1c0fdc98140215dc389a89839122fe8eea5d2f3e24fbd4bec249d10. 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/USDY41898104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a42404c23a1d64d4c77b7926ddbc7dfe2f7879347aadf7e2321eae12be4e3e. 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/USDY41898105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980c857a59815e57426e7c1789fe4f97e57cf2f7bffafda3da70680b11072d81. 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/USDY41898106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2898cf033151dde3fee79317131ea4fb18894acaffb6e17e5056e914d9981163. 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/USDY41898108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118b1fc79e2f08310f5372da638f43ea6efbdc1917613a3956c6441a6d2c044a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USDY41898109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610ecd53557507474a173404529c48d75e59013f931fd9bfaa515e4df5df37cd. 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/USDY41898110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95630de1795c65166e319df5497067dc0d83b09481202455f245a7c587e8e4e4. 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/USDY41898111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e051b7630beccf22fbdba0cfc51936c91e90267870cde1396423214bd3b5b9e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDY41898112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f311688fc12f53a4c50d846fe6a1b3d43c184213a2139fc80363bde42c2783. 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/USDY41898115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d86c763d76d89e92b60b15aabf62a84c0f06cd82ccb4b7df4952503eeffcd9d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDY41898118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af0754806f621368fdd2b968b54892ab65d9d895eb458cc71eea03d65e6f48a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDY41898120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c86368fd5291ca05792c1b6e9243d8a28c3210f509c3b40d6be5c0a62339f3f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDY41898126.
Jazz Jamboree '66 - Polish Radio Jazz Archives, Vol. 31 (Volume 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391e9b08b4a961a4a55451bcdbfaa30ed10971e050b4eee80960983390561c8f. 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/USCGH0686747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d3a47456243e65fc8501262e90f91ef7e69b1521332af79905b493de6df002. 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/USCGH0686750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dd54d3ddfaeeff404eb53335c846f0b802a87776c0f0fb645ad13a3a730bf6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCGH0686756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c59e014b92da855a55ac1b4e3a5c8090a4e97c3428b29962192a3de9297bf92. 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/DEB337404702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0346ffc0fd4b6d6ca3105e8e8d160f0abdf8bcf9f1fdb0b6eda6593e081b50. 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/DEB337404703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5d336dd43bbc50ae1a35cedc2ae93f51ffc24fef3d7e85c92ff616ab4bf6aa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEB337404706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac42e0e4ef7fa9afaa1b7ba87c5840306a1ecea65af11f095f6c923cdabc5d25. 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/DEKM62200459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85eec388b0db439894d64fcb8b9ec898aa11830bb7e027fb771b45d7f855aad4. 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/USCGH0805131.