Last Winter is the debut studio album by American rapper Bas. It was released on April 29, 2014, by Dreamville Records, and Interscope Records. The album debuted at No. 103 on Billboard 200, selling 3
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 0x57263fd1b88e9bf08a29895d2146b851fe146ea0d4e5046c3f42375000bdd805. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/390012d5-baae-4d19-a45e-0552c9a61d09.json and https://artists.proofprofile.net/proofs/artist/390012d5-baae-4d19-a45e-0552c9a61d09.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 0x73a677c42e721a6e81547fe180bfc5588f8f1b10b400beb90662455f574fe1fc. 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/QZHN52167569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0528b0531a4e381b466da1f42234eb9ae7c3cc3c519363ce67eddce589293b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:15:30Z), 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/QZHN52167571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957dce19f431102ce82239db87dddb70061c75ff8b1e5e07eead22086456d272. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:02:43Z), 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/QZHN52167572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69306c765cf776b40f5b06c896ebc24ebd20a24200b77f98e0830f347cfc3227. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:34:16Z), 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/QZHN52167575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44b7e04821b4e9d301ad718b3c2c314b73e66e75749113d9ef4886a3e60da22. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN52167576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc6a80d099e59a0a7834c9bf844f65b23865180afbbfe4ba7efd7bce0f581d9. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZHN52167577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7fef6d818db5f19c6548e1e2ccababe2c0aa4de91c719064fd520f0d86051a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN52167579.