Polar(s) may refer to: Geography Geographical pole, either of the two points on Earth where its axis of rotation intersects its surface Polar climate, the climate common in polar regions Polar reg
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 0x621b0078c265d245c0ca34a5de62898c2827b1a05fd7c1d13adf9c4195394bf2. 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/4f0ed1ea-6f45-455c-9772-b64e0872d27b.json and https://artists.proofprofile.net/proofs/artist/4f0ed1ea-6f45-455c-9772-b64e0872d27b.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 0xf62a4c1d3cb90b84e31f10d3b4e2222b0b1504d9a17c0fb3d181aaea278c3e8f. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:27:16Z), 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/QZHN92292468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ca6043980ee8da59970829de6fed4145618822d9164e42430c952458132d1d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZNWZ2247517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df759753c24682d0e6f8858f4cd5655ff76006572d6dea4493c182b6f54993b. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZNWY2306978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629639561ef83b2b0202a86d4be055f2e239d859e16394ef7dd36b236ca150ee. 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/QZWFE2494450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc06b25913dbfde659f0e50d95c8639ae4c4a509df492b8c91da64bf93d9cc3. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:47:09Z), 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/QZWFX2492949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524dcb462966c42e428848460e8ecc9cbd616f09d1d084688de332fd08ad32d4. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QT3F32470877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905636abd7677883799b7d085d08dfcfc824fed1c561c5673aecf9d70a1ec83d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ7U2462253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc06b25913dbfde659f0e50d95c8639ae4c4a509df492b8c91da64bf93d9cc3. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:18:15Z), 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/QZWFX2492949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad30965b4c33ba4648f2e5c8a84a285456a04f5bb0930d450a9d1b886ed5b6e8. 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/QT3F32470878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5a89e2132bd7aa34d7c26035218191f508f79ba057bc0fb6ba151aa0f8faf8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT3F32470879.