Dan Higgins (born January 28, 1957, in Boston, Massachusetts, United States) is an American saxophone and woodwind player. He has worked with such artists as John Williams, Seth MacFarlane, Aerosmith,
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 0xc2ff8cb4e6988a78b6270d2617efb78044a8e825ffaece25020f1bb1f3050c28. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e46f339-97e2-45f7-b6b4-d5cabfd45807.json and https://artists.proofprofile.net/proofs/artist/2e46f339-97e2-45f7-b6b4-d5cabfd45807.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 0x0027b76e95267cb9c27cb7f159ff1e707fb70b3c9338fa80b43b5ce4c6aa8d6d. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/US4R31500033.
Night and Day (feat. Vinnie Colaiuta, Bill Cunliffe, Alex Acuna, Dan Higgins, Bob Sheppard, Jake Langley, Wayne Bergeron, Kye Palmer & Bob McChesney)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70636fd3f11936226981c7888c78f464389a22ef017a5d5c5a7ebf430d3ebee9. 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/QZBMN2000102.
Call Me (feat. Jake Langley, John Patitucci, Vinnie Colaiuta & Dan Higgins)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9f71b7334479420d4060e44d996d55012993b1e1612385644dd99b1cf5d072. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZBMN2000105.
Loss of Love (feat. Jake Langley, John Patitucci, Vinny Colaiuta, Alex Acuna & Dan Higgins)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256d9b20e7046afe9c5095518244c819c3a3412c24942f4982758b8db0ac7f79. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZBMN2000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850cdb5dd17ebde219d2a2c951e02fb5940f49bd6a13b4ec63307b22e5456ff9. 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/US35B0416701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c664f3b1f849cd4c9ff38c9590c294afc4dc39f9786fbd8d3492ae1d530cb4c. 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/US35B0416703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4d44d2dd2ead727a11cb1d57ebf34cc067a6d748f157799a1e9ab151d51706. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US35B0416705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3e3db2c17b33113238d11679abb06018e57e5e3ce792c68e207884ee1aaeb4. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/US35B0416707.
I Love You And Don't You Forget It (feat. Chris Potter, Bill Cunliffe, Dan Higgins, Michael Dease & Alex Acuña)
An Evening with/ Andy James & John Patitucci
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4438684ff222ed05fbf0ac9478af2ae87ec2ee86723bac4cbf80181ef60d0064. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USLD91734945.
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