Joe Chambers (born June 25, 1942) is an American jazz drummer, pianist, vibraphonist and composer. In the 1960s and 1970s, Chambers gigged with many high-profile artists such as Eric Dolphy, Charles M
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 0x6f86f6adadab8d07197c8daa677887d6254d47d6c2d259569fa165c94a2fd4c4. 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/795b356b-7004-4232-b3ae-13b1a08f2fe5.json and https://artists.proofprofile.net/proofs/artist/795b356b-7004-4232-b3ae-13b1a08f2fe5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Joe Chambers Moving Pictures Orchestra (Recorded Live at Dizzy's Club Coca-Cola)
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 0x5ad2b1dab14fd46899d9c6180745c40f9fcaf28e47ffd65a235b060cb7467e1d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/USUM72024099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f39265943b13950aa92052e166a6c61e99757c5f303dad68fb8c5f360c41cb1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USUM72221605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bae39c670a493363c8e9ec2bc7d9664619da9d7c17637541a7d25b45634bc48. 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/USBN29500619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8817d0e92bfe4bc552a87975d5092e83ef1fa35acb6ccbf4be38dd2a3915b286. 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/USBN29500621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ca10346439f331b89d3618e79c3f168fe0931443e1165bc3867e08e1da3f2b. 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/USBN29500622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456f07fd3894547c870ca4b8dbd0d1f218a1f87e146ca70b1be680b66b3e1a97. 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/USBN29500623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4f029adb153d806b1a361bdde6cc87c237e90cf702bbb40524fbcf843bbed8. 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/USBN29500624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880647bd23a182b140412746bfe80f03379323ff3a14acd340daf48dddceb192. 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/USBN28800093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bea73bcc5d75753cb6344147e7f94c277854422be0cc33df662f31e8c923cd. 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/USBN29500592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e691adc61ba899117a73c550b1f443279455ad684941fb4b495a91d3a68493d. 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/USBN29500595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4176ec9f160372adc2bc4d02b0890c5359b793646fd87012a857a7601b6a64. 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/USBN29500593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c620ec9c758deacb704a3dae390c3124f65495bbdbfc9d04b50b959361d5313. 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/USBN29500594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe523be4020a9558240d3c9277b19a8e52afaeff30dda7a5528430daadff9f28f. 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/USBN29500596.