Harry Haag James (March 15, 1916 – July 5, 1983) was an American musician who is best known as a trumpet-playing band leader who led a big band to great commercial success from 1939 to 1946. He broke
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 0xd2a8731df5a26005a9a43a1ee5657e9d786056c9612e9c7eeb3c99b14542fb6b. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3012cd9b-b8f5-4d0a-ad74-d34c4b8bf720.json and https://artists.proofprofile.net/proofs/artist/3012cd9b-b8f5-4d0a-ad74-d34c4b8bf720.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 0xe47bbb520653f1b862c00ecf4ca334d8ca2c21630d629e443835764f18fa203e. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/TCAJF2588777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4838f8c61e97f21db2cc31d9f6b8611dcbc36e4686396ff249479816a0af79. 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/TCAJF2588733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf345230c1046c3bc855e124269f1c8ccf446c68594b85f5ca0b8a960e1589136. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCAJF2588753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f7e907c0110a2250f6f410e0562d6204d131f5f0b9509cb3ab7c7440ada833. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAJF2588766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c796535ef6e473244f53215ea058731524ce7ee6162f6871a1a4ef8e581edfa. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAJF2596572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a222e540e645b0b6d07b794c44473c0d5f91a24a226ebeb1f7e5b829ba42632. 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/TCAJF2596593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab9d94b21c2a25572aee52787508751f03f367faf32bb8c657bdd1acedd7a36. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAJF2596543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc621e07ff7dcc9708a7826f64cd89efe06a1c8cb655d804c59cd8b6cb5d02e. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCAJF2596558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8196ee5a6e59754c4ba14fceb44295594b50e39204d9c166d8ad34240d4da7. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCAJF2596582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13db0ba70070c3c5c13fc7d04f6f58b62e7e4ab39f49f729c09a5a2228f6b213. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/TCAJG2509066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18d0a2ca1aad62ac3044fab7e33ef887b76e3f320ae4a37d00c2d46f3bf450a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAJG2509071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a901305d197ff621045c3972de7ba5024ba79a82f4c832f56873ce5f511c8e. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/TCAJG2509054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd16d5898cf0eda4e36a4255ca98a15f24442fb3fa290e15fe8c123bf7ea874d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCAJG2509081.