James Price Johnson (February 1, 1894 – November 17, 1955) was an American pianist and composer. A pioneer of stride piano, he was one of the most important pianists in the early era of recording, and
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 0x592d4232da977e3265c7a57ae25e9e07c081db8a4d306a1f6ad51c2f63299af4. 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/61e9677b-5b29-473f-943b-5fb7bce2870f.json and https://artists.proofprofile.net/proofs/artist/61e9677b-5b29-473f-943b-5fb7bce2870f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
James P. Johnson: De Organizer & The Dreamy Kid (Excerpts)
The Father of Jazz Piano - James P. Johnson the King of Stride (Live)
James P. Johnson: 'The Father of Stride Piano' - Carolina Shout
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 0x1a7a0b66fa229d444782940d04729a9f915e568f9d6b3fa5f0e6fcd5073de956. 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/USSM10101828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d383ac384d42466afe40f11d21499a108633a1d164e5eb29f295e36a1696eb1. 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/FR6V80087921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd497bf0b0bf7b3a8ff2cdf6586a6b146d94f9f4ed706d036fefbb1d7d92b2ff6. 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/FR6V80087923.
The Original James P. Johnson: 1942-1945, Piano Solos
Victory Stride: The Symphonic Music Of James P. Johnson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150bf252f7c4219df7bbaed7494012fd89d6594ee18d2d853aae3bf6bb9d46ea. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:07:30Z), 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/USMC13054337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73304e7f833433880f96efa39ada4201aa4ee334b38f44916bc67714219a5ad. 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/USMC13054338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db73ceee11b9945a94c4278f2851434f2ad850a7f1e1303aba60e0012a5eb94. 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/USMC13031958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120fbce8d680beb1576bfecde816ca32fec9770cd6fd40cf33b8f11e29b3329b. 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/USMC14472234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640f80d5fb38642b3ae7072a00737568c2da24498d89be56c916b6edd8f0eb3c. 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/USMC14472236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb10ffe8a1363e5e0e7d5b08d3e121e5a22bf9500d8f8629440c7bec25aa29f. 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/USMC14472311.
I'm Gonna Sit Right Down (And Write Myself a Letter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d460438db79c9d3d2af55e9800294c6e950dca700156302ffc5527dfbee9e47. 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/USMC14472313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d46302dc2d4b2f5b8e3c95a99257af43c5be4c398c133065044af1428f791d. 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/USMC14472314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fda045ea08f64ff6f817e812f99db1069bd2d67105d1b4091684b6d446250c. 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/USMC10346460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed8afee76952c1a863dcdc0325ead8a5679bcb513900d54b257e3f581cf5e29. 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/USMC14472387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ff1762a9e9316b4e7231cc33542472ca63fe9e8e52943eedc0c7a58b738d41. 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/USMC14472388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad58c27a67c05e6c2ce0e64dbdd9f25abbf24bdaae1158a0c2db4bbe40ac6ca. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USMC14472390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8fd83dbf94f14aba48650a4752f611697471512088fcb752096e12c74d46d9. 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/USMC14472391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a89e876977228f74f89b6b6b54283245767810319d8808f611aff46c7b36e91. 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/USMC14472392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa870bdf29a0b20b85454d03affeca38f992622b15a5a5895e3de0a58d937647. 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/USMC14472393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc690a4222a812b5ee50dd6f46f75dae75112a00836ada8f22090752dd6ec1587. 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/DEXO22209193.