Double down is a betting technique in blackjack. Double Down or Doubling Down may refer to: Double Down: Game Change 2012, a 2013 book about the 2012 United States Presidential election Double Dow
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 0x22a23860293351a61ab86872a454074a278aae031e751d6163a20b3d76ff6496. 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/2cf24bbf-8e2a-47a3-83ef-c776e67fb557.json and https://artists.proofprofile.net/proofs/artist/2cf24bbf-8e2a-47a3-83ef-c776e67fb557.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 0xcdb0d387bf9cfd6b6f36747c909a60245229d081577f0b17173fe9c138380c8e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAW2485958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f936a125be9f47cf58aca3314e77e8d21e73b6e737ac60ed7de9ab64d516ae. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZFYY2577531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59614fa4f7f72c30a7d9aa62477509e8004eb8b45417fc52aa8975712a54323. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZDA72570718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207c1270f8094ef43c9e7df4f96e377cbecea425f852b1e542bacfaf0803d041. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZDA72570720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57212a3d869fb1c5b91d310f78c9c0d8340bb3798000aac9c0ac536d664f9b4c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA72570724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa144876c3fafbeb311c699410e41cac52315d6b2a83a4a24f45b01e366092a26. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZZ7X2590736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0203a2fe83b32cb5357da07c99501ae81ff5c36a61221bfe1cc67d38632ecb30. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZZ7X2590737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2d57999d37bc15843fb815e06605a50e6b492baed26d55206fd9184a3e0958. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZZ7X2590738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528176fce9c3c8514bd1e1ba03b7855bb9518696acef2f848d1564d46f1d1b21. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZZ7X2590739.
If ur in danger, just shut ur mouth and hold it (Feat. Double Down)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d90bc6947141f5850f862bac73e8a0e74b4ea2f7246843d3d9d60c9db32e61c. 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/KSA002400362.