The Left may refer to: Left-wing politics in general or to the following political parties: The Left (Bulgaria) or Levitsata! The Left (Czech Republic) or Levice Die Linke, also known as The Left
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 0xf5277d7f740155d09d79b7042a6b5addddbdf6c299cf8e75ac4da44e651603df. 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/d853142a-7377-4291-9b84-1fafe49e2065.json and https://artists.proofprofile.net/proofs/artist/d853142a-7377-4291-9b84-1fafe49e2065.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 0x8d028b09a911bf2014aa6f3825cd63bc7ead70c65caf08aaa075fc3443e767ff. 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/USKVL1010202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0035651844b642ccd29c38acbae62db775e89affb245f3d00f86857d5308609. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USKVL1010203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8dbd32f69a66630f9feb3b998039792ee11ca1dba9b40b568283072d01ae5b. 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/USKVL1010205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0e6a23b8f0d548a6a1605b8f184ed1b58e479447655f7901b3a1905434ceef. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USKVL1010206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dbbe6c4eb39dd1cab0766707c2db4ab0407710ceb6a0f9778bc1686331aa2c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USKVL1010207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ab971552f60a25a42a38426272baa6670cb12e30d2030f9a4c99a176f9febe. 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/USKVL1010208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc703718ceeec7cd3704bd88cc2bd5012892e68e3680d26a55ea96a0302f6f7ff. 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/USKVL1010209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c47e3dd2f6a6a3de9335cdafc9d4a5d7de6ae11142143a8aef3e2e3106e91cc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USKVL1010210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c6d9e92c9905dc467c546b540131714a6f56b2a7cb175e159c03d4f9ae22b2. 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/USKVL1010211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae91869a87f615fdbf0e937f9035ceb8f231f590cb54dfda1b772eb004f6054. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USKVL1010212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07aaf306a9c69c31f4f7689a10e4f9adbe7056bb177bf89edbdbb2a0d87d65ec. 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/USKVL1010213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d330ac6afd32f488340920d941075e73e14ed2a382d5ee54b544f4580affd2b. 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/USKVL1010214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28c1511df718dd5bdb81751f83ac29762d2e8f043961ba389b17529d7856c95. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USKVL1010215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75b873e16ec4749c41d788af6b82547b29aa118d5d9c6d5861c86d713313228. 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/USKVL1010216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e176aea2367d719d136226cfd3879115afc03dceefb4973dd1ac3ab27edae1. 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/USKVL1010217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f59842646b5564f584335fb82858baf95506a08ff7c18f267669ffcd0e612f. 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/USKVL1010218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7d43f09a532206ee5e3a12f35ef068864ba99ca144059fcf94d391b0ded081. 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/USKVL1010195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0a3fd7805274e78c94f6b0006eba37e88e5919f1e849990bebb46760ac3d74. 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/USKVL1010197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158742c762bce5ba092f6968ec6bae8a65311d38bd394322c53afad9468053ff. 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/USKVL1010196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2857d408ee0c0caba22774620586a851ce81bdda4a573a1ab258dbfaef07c4. 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/USKVL1010079.