Left may refer to: Music Left (Hope of the States album), 2006 Left (Monkey House album), 2016 Left (Helmet album), 2023 "Left", a song by Nickelback from the album Curb, 1996 Direction Left (d
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 0x4f1a98672ac8bc199d81a9038a66df4f9fed4cc7aa413f87f139b3ec24a8f0de. 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/2a22b3c1-6268-446b-b86f-c2fc567d29e3.json and https://artists.proofprofile.net/proofs/artist/2a22b3c1-6268-446b-b86f-c2fc567d29e3.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 0xa1a1c416e9f904502882ccccbb080c49f6c79188004461bc65ed98dd6e335d06. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX4R52365902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7fc7b7fbdc50e05a0ccc19bc5fafce7f51bdba5d1c63dcaf4856f1aa5d961c. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/GX4R52317753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a911af22714e2c4f7976f319266f98b84bfa29d8b9402428c561e1e2048d42. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USA370382799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a52f43a4dd9e016a5681f821cc5c74e9cfb9c1416c02e58698a71d1dc0070e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USA370382800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602914a0263dd2194f2fb284e996e77dfaea9527126ef844a50e45b4bb1e9f60. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USA370382801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbb4cc4c5be1672095e0752ba9ff560049ecd6219594b34b50ddb68b744e8b8. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USA370382802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5855057d77180e8d406f22222516e513b258f8057f71dc180d3db52a9e328a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USA370382803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f725be099ccf99637cf00d4e6537f490fdedc2f97c2a08bfdc3627d27f8ad3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USA370382804.