Louis Andrew Donaldson Jr. (November 1, 1926 – November 9, 2024) was an American jazz alto saxophonist. He was best known for his soulful, bluesy approach to playing the alto saxophone, although in hi
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 0x9d72b1a4a1161cedebb874f35b72099e2f885fe98efd566e721444573b56f7b7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85b45cbf-ceaa-4d71-ae05-d38fb3605718.json and https://artists.proofprofile.net/proofs/artist/85b45cbf-ceaa-4d71-ae05-d38fb3605718.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 0xc02659b3121b5fde36bec2484f5397a15d4285e1b5dbd0b56781d2413b29c471. 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/USBN28400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c124fb4d5ac1ebb1f5137d47ff75d0f0cb08b97374f1826347933e926b9d7b. 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/USBN28700275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce04624a8144f062213551be705bf3c98fe6b3435ab62c815045ab7831dc035. 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/USBN28700274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa51c8e98308e428549669aeb5c0abc101d529f0fa4979fc04ddc0bf235bacd. 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/USBN28700276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d7c73fae1cdbff2b2963b1f1e94bb49c21a49be295fdb848a770fec04b9579. 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/USBN28700278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62a006fc41df809a19cf032506cf6d59e5e1e6beb6e2a77a45b8424d4792a9c. 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/USBN28700277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02659b3121b5fde36bec2484f5397a15d4285e1b5dbd0b56781d2413b29c471. 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/USBN28400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0de26077f319e834237dda1644a9e50b25cba31067e3ba3b5c616f086f9092b. 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/USBN20200375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe376863a5eee2469f817c8956a8ebf4c77bed72934fde59965b37d644b8b5a9. 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/USBN29300085.
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 0xe0e07d46d44c969c28b3043a775e0b0482b4eaf71c989b00fc5a79775ea38f5e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:27:36Z), 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/USBN20800934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeace890be3dd0b3bb6964b9fd7684723d9231e1bd0cb9c1497c4117b8e2a072e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USBN20200374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7b5b0b25ecf79c3d5a7cf00942767d18d6688434994271eb5e1a3450a1bcd2. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USBN29300197.
Blue Note Trip 9: Heat Up/Simmer Down By DJ Maestro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862eb74d618f849de636cf7356a2d53c52d879321e1496fa73738bb0b709dc54. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USBN29500118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe46d2f5b1c4f4898355e49a9d7291d32d9e02a58d1003f7edf953f11eef3ae4. 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/USBN29300191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968dbbd3d36c14751a683e3e8448909b5c3e6bf172636d790fe0d2cfad2e243e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USBN29400287.