The Dallas Brass is an American brass quintet started by Michael Levine in 1983. Its repertoire contains patriotic music, classical, and romantic, among others. The seven members of the group includ
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 0xc258dea4cc007f8b41e2864a0e7280e94bf3259df6834c2bf201b63cd0a0102d. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09701a41-0094-46b2-8df1-72c8f58510a0.json and https://artists.proofprofile.net/proofs/artist/09701a41-0094-46b2-8df1-72c8f58510a0.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 0x71998ceeab111c038a38f6393006c4de28923800d2d72b65a47ba377945eb996. 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/USX9P1085886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a974663d96fa51db5b998044bde0f9e44c15e3956fe9505c6f8de296c754bf. 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/USX9P1085904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0172868842746fe083ee2f02cfc48997093ed2b1ddd180af80d41cba0e310a17. 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/USX9P1095026.
Three Renaissance Dances: The Old Spagnoletta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375919d4b7d8c2d0331d55ed97172fee0a95c65ea8319e4839d6935af3ad86c9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USX9P1095028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f43c52be8a1ef2d87550a07a6ed6a82dc66099c7115435714a09182bf4da6c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USX9P1095030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b1a46b34efc2c26e3cb010f3df82c366e46a1fd7696bf412c5be770873b868. 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/USX9P1095039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11290917aaaafdc91beda432d28fbb841a9216fc149fbb444874b3d3c8f44cd. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USX9P1095027.
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 0xb31912e55fc709557313fd0519a364173354ceefa0e79118fe4b3be013914645. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USX9P1095036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a7fa315783bbdecf9af84c15ab9441571d80cd3200a51559bf073e9910e2fb. 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/USX9P0762632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523017e0079b6104272d058673dc7a4b406d03638f47209f4d7637b7020b7bbe. 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/USX9P0762633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115d34ce551f02ad6e26366e58e3b8d93ac2fc392cae8f7987b50e0ba44b114f. 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/USX9P0762634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22025c49cda352eb520e7e8ac5d484978e5ea2fad780245a6b1fa4a619933819. 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/USX9P0762635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cde77a6052c91040eaf3a2034fbb02bd1b5cf97bbcdf8eb00da34256bec561c. 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/USX9P0762636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1ef2a79a1c2299ef87db4642117057ed43bf487dc67cb2c56f4123020e281b. 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/USX9P0762643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6893b5084ab5d01495bbe5020929e2b0e40c96a78e3cf630c626920fa5b81b20. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:34:57Z), 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/USX9P0762640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6590093fecfbec1cad7f702ee18a2568ae81cdd43b7cce808c66331a0aa401. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USX9P0762629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed7f864771b220027b405b9e33aafda54143aee313933a9fdd539e7fd48f7ce. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USX9P0762630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2912e23d9b4a50e7cb1b684cdac6b9c65d79400a22a9a7d577d463fea028aa. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USX9P0762631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901fad7aec48b3adeb7cbc741dd856d249ac3bf3c84c613004cadf094e33d02f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USX9P0762639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e6ab8858f9801bddb630eb41078f3ccde07ffe858ee5b142d92a037aa8b429. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USX9P0762641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c578841f9bfd2295205c1f75d1c2c1bc18771217d694f32d5b220c83640b1d0. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USX9P0762642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357a8576bb635702c03b1ef6fa2edf039debb555ee837614f4ec3614e578e6e3. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USX9P0762644.