Time for Three (Tf3) is a classically trained string trio that explores a variety of musical genres. The members of the group are Nicolas (Nick) Kendall (violin), Charles Yang (violin, guitar), and Ra
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 0x90772a91d3faba6110d6c6364c8b1cf68d76b61f55415375655532be8b7a37b2. 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/6bbbf491-c1ef-4453-8d0c-43f1f720582f.json and https://artists.proofprofile.net/proofs/artist/6bbbf491-c1ef-4453-8d0c-43f1f720582f.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 0x8b04b6d270c9a14a0040cbb69fead09028b58fef95589d580daf7c042d43a150. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USUM71404901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1587d6e2d936709c28f254b6f4fd0c0b8082777dad58cb028eaad0871d7761c1. 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/USUM71404902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922d59c00f9c03f4522cfb63ddcad1262d3f3b8c6abbcfb679ab06a10a876f82. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/USUM71404903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f815dfca7bf38c4e2eecc6528bc935e8c15fe8616fb101c09dd8ec3f3508d32. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USUM71404913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c04ad97ffc7a7f07dc1f57c43a9a8045520b743c6b912e91f63884d779474b8. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/USUM71404906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bb6f176fd0df16fd369d2996a9701a311e0e9213e11a2d1cc774e5011c6e03. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/USUM71404907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2de0f9db713d4e1c2f7871f871218a320e425e358150b4c65b056dce0667f2. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZ93L2057949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead46cf70cab0592a6ff87c33318945089e074bb28df843cd7e3f87e9dae78b8. 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/DEN962200371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fe4a79a5aca0a0d728c76ace626b5c9470225a891999b8f53cf99ea5ffb8fd. 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/DEN962200372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112a996d17f804dcf054f44a255e1fe86c0688536bbb7568984d4105959e8af3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEN962200373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f15cf33a34860d2a31eecccfea820c5b270c05073948a71c47efd9cba5038aa. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEN962200374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844bd38c4bc754e483518a5b05c850cdbbdbdfb04374bc90a7865efade39b7ea. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEN962200381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb812b2a0a19769593fa2284f439cfe6900bafd069a5874193f4a821aa8d9561a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEN962200382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55e26b31cb89b9e1996e3e6ab3c82fa661e3601fa619596c37d4e4bf1568b97. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DEN962200383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d9999fbce91e7159c1d9371ad467f4046c7492d8d0372c08de988d3903ff5e. 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/QZ93L1974694.
Learn to Love (Live at DopeYeah Music Club)