J Mood is an album by Wynton Marsalis that won the Grammy Award for Best Instrumental Jazz Performance, Individual or Group in 1987. Critical reception In a review for Playboy, Robert Christgau sai
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 0x5605ef5ef79ec3f12640e970ed64af008c1394c1179f842de354eccfd8e71324. 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/6f794016-96e8-4173-9407-b0402b83ed67.json and https://artists.proofprofile.net/proofs/artist/6f794016-96e8-4173-9407-b0402b83ed67.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 0x53e5aa23d965fa41babff34954c8156006cb32715354ec702d6bf7e420ec0e34. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:33:27Z), 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/USL4Q1835882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ef0595f8e8c2d2aadc192a28660371c2f8a05697185df3ed4db69b2b8135d1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USL4Q1835884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94d28bf6c5bcf3225ff1a1ee8a16b4825ad951ecdc2b1e5698e8641206596a3. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/USL4Q1835886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0757674ff427d47f18e2f8b0d7524f67ed9e9b57646d5191dfdf24e4ba3fdc22. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USL4Q1835887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f3ad30f4701b449dbe1a73d86b134aa699612b2245810e1185dec5b51cc557. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:42:42Z), 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/USL4Q1835888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609c4872df06a717b9fba486e299c29f02c4efe1db39331c33cf82fccad476ea. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USL4Q1835890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931344a950a8d7bd5f4bc699d5e545f978a2fbb74c509fcb56dae6edcf651864. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:29:00Z), 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/USL4Q1835891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ba93c468e47bddf9b2383bf42002b310a20abd30906d19d67aa026718d1f7a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USL4Q1835875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023a2d18c37a56c33a2823658a8c9e48d45cde31671ccb3509bf8ab31228e692. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USL4Q1835876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87933b3c8a84123973ca7c4693190a36dfbecffab7fd74447f42a05c5437bfa. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USL4Q1835878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb46ad3f6099547ee9df22e395f7c4701c142e4dcdde44af032831bfdc23717b. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:43:02Z), 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/USL4Q1835881.