Lipka (a diminutive form of Polish lipa, meaning "lime tree" (also called linden tree or basswood in North America and different from the citrus lime tree) may refer to: Places Poland Gmina Lipka, a
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 0x30b514d4a8123c2d22ad4ecf6a9f220b7242104e2ade88fb1df469df43d41d00. 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/a0785b52-9fe5-4bec-ba44-22d1688d403a.json and https://artists.proofprofile.net/proofs/artist/a0785b52-9fe5-4bec-ba44-22d1688d403a.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 0xb64ddb1948bc5645caffc12089d280f0f49a8af9a72799971e940cbb2b3541f9. 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/FR6V81919530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc84ecfc70d2454d771945ffd08e593ef85bfe820b87b997b2982de067f1df2. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/FR6V81919533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e97cc72a0be9b8cbd2bf22ab5b415cddf0f6ad108b2df3ea2da11cbb09e84e0. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FR6V81919534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe407a7ac248ccfa570336aa78f9caa8efebb79e3dbc3ccf6389dd451646190d7. 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/FR2X41650799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe771dc7187ea352e8812ca3f02e2fadb92cc93c79b04a03639b9c215b06c67b3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR2X41650801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05fd0e62a026d6037f30d7bfa1205d88e25ad670caa3ce694c4814ba6ef7719. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/FRX872147620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422e7b51adb4809f739e7f89b450e85f183cece71846bae9de4638eb0a8399ae. 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/FRX872147622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8556acfda12974a1db4003433d14ab2a94bceaac2f3fddbbe6bd019f31acbe. 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/FRX872147623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ff681928acd24d2c46fdef1e2ee8420dce4cba7f31af6bcb06243e1ab8213a. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/FRX872147624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb989f3c5df40f8d8b774499c7b860a81a7e56c31801157c2e13dec872dd705cf. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/FRX762092187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a7320a471ebf3799b31d06dd9c036158c5510c31582b04bdc9aafbb9820ca7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FR59R1916299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afdda0070016569696fec7158638f5057b3e2f88951616830503da97905c041. 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/FR59R2104834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f40cb37684fb49cce67b8b9b9825dbcc101dc3f7bd5e9be9623671210eacd9f. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/FR59R2369587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673c70893a8d0d2e9b60197fd9dae9a72669e9e1f15ea8e8d1be87407ea14d50. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DGA0Q2325014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f5f36ebc93df5ff9e7ac2751c9315254b267b7e528d24b7daef8fb9fe8d982. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DGA052458209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd076f3531a4296eea685f0912701e7eb6c6d81d9ae90ad686d0a2643ec3b8bdb. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/DGA052458211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc430f5ae01f4693bfd31828040d3260e96d4552dce08ba1581141fbb2e39624b. Chain 2 (Bitcoin): anchored in block 957959 (2026-07-14T05:54:20Z), 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/DGA062439270.