First Choice may refer to: First Choice (group), an American vocal trio, active 1971–1984 First Choice Emergency Room, a healthcare company based in Flower Mound, Texas First Choice Liquor, an Aus
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 0xa2542f355b72b5976da8f7ad45002616ad12fd4d4f7cbb8b2f19c7602a1090fe. 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/02233cfc-eb1d-4138-a427-5a9815b5c57f.json and https://artists.proofprofile.net/proofs/artist/02233cfc-eb1d-4138-a427-5a9815b5c57f.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 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 0x5052747b6c52a97ca1b79187e785d6faae091bcd683895e78f591ec416d66ea1. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QMMEH2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e8d6279889fd4ba3d16a2474bf95f7f63ccbe84c3e7049ed56bf2f1367eff5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMMEH2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fee55da3bc94a752bc7733c6e78cb9e99705d811700e02dd5dae53adef4256. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QMMEH2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcfd5c69fff6afd0d33654e9410c26d0b5e9aebfa437e28b6bdb996834fdd07. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QMMEH2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99db4ca8d90b167134a1c528651112a55325361a92a9a9e7f1c3e16a3678098b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QMMEH2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac3b05a22489d9e2de43b8eede6c7904e2b5cf42448e25377c488b417d1dcd2. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QMMEH2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84e1a673c2c36bd49df1be2ce1c6e393a70ee4c6bfb6a133203c84a10c940cf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMSGD1220064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68e5fc0ccb2d5cea4699520c50e1e1ed15161ba164544c7bc55bd6a7a1ff8ce. 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/QMSGD1220067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe147489ff9677ec295c4d99c1c1aff0fd48ad06a2fadb43cf633a8c08db7f2. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QMSGD1220068.
The Player (The Mousse T & Boris Dlugosch Mixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513c03b67f3572d2ebb83f510b26ecd0d10f2c1015249eb067a411d9ab2b7cf7. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/GBDLM1400439.
Armed & Extremely Dangerous - Full Intention Vocal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae5b4b1fda703147c11ba8380446dc70910d5adddc5fd284d593de4d79ad26d. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/GBDLM1400431.
The Classic Acapellas - Essential DJ tools from the Philly Groove Recordings
Philly Groove - The Definitive Club Mixes From Philly Groove Records
Back to Back: First Choice & The Three Degrees
Let No Man Put Asunder (That Work Remix)
Philly Groove Records Presents: The Early Years, Vol. 3
Philly Groove Records Presents: The Early Years, Vol. 1
Philly Groove Records Presents: The Early Years, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d830fde4e0dfa66a7fcac910d9d44545116f2e724c51f82323bb44839914e1f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QMMEH1300139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0dbf681b81979872b8ad6ef0266cf7e5a98846f4534c40dfce1129962ba4fe. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QMMEH1300224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846574730cd0028349f0267fab0c8bbc347483af3b2e8214890fe97098d80c77. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMMEH1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c36bba9237e6fc721838e998b9ff1b8c45a72083471c78ed99dfa0fdff3658e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QMMEH1300165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809d76d7cf854401e721a969b3252d2720a873e5b7fd9039cae024f95549aaf8. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QMMEH1300168.
Philly Groove Records Presents: The Early Years Vol. 3
Philly Groove Records Presents: The Early Years Vol. 2
Philly Groove Records Presents: The Early Years Vol. 1
I Can Show You (Better Than I Can Tell You) [Phonk D Edit]
I Can Show You (Better Than I Can Tell You) (Phonk D Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fb9d5519cc34b7e525ce8aeab2b6a1f0e41fc2ab55329591cefeb9215d8ab6. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/QMRSZ1801291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c29cfa0b7eca23f753be57c8446a0e8be0325ec4ea34efbf529eaf97b12a53. 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/QMRSZ1601395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f43a4cc4dc3d070384fed29386b951cf4c18131ea92ac70f843c6d11a156e8. 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/QMRSZ1702116.
Double Cross (feat. Rochelle Fleming) (Danny Tenaglia Swing Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35661dd8dcbc50c037f5ebc6b7a8ce432aa157cf37aa534f3ff97e801d901e8. 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/QMRSZ1601350.
Let No Man Put Asunder (Shep Pettibone 12" Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ba99b3dab2b45e062085797c7382a1427577616edc9a77c716507aeaea73f9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMRSZ1601382.
Disco Vocals – Soulful Dancefloor Cuts Featuring 23 Of The Best Grooves
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e665a8d75979fa79d23a054e4161a5b2a986d7a4bafda2cd5fba530fd18f4e0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USSA49810265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2314c3af72b270daa1edc131999ab2238ca21acbff9dcfae93b99a7a7a82d128. 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/USSA49210023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e122ba7beacb7dce8220bf2aed6f20b0cf0aa864a1cc32da445f5e892cb087. 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/NL1ZN2201771.
The Player (He'll Shoot You Down) - Extended Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9dd9c75aef402aabe23ec941ae3e0822bfb4f0647320e36408dde07215dde0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NL1ZN2201772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd8a54dc1cada47699612cd22745ed99105f106fdc43117827e23732cd37302. 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/QMMEH1300014.