CIRA may refer to: Canadian Internet Registration Authority Centre International de Recherches sur l'Anarchisme (CIRA), library of anarchist material in Lausanne, Switzerland Central Illinois Regiona
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 0x044a8f6cd744969a4e3a318a115c3fd6b545c7dbcbe929af4fcd8cb9b7f63c97. 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/3cda48eb-0be9-4e5a-b1fe-29edcd7660ed.json and https://artists.proofprofile.net/proofs/artist/3cda48eb-0be9-4e5a-b1fe-29edcd7660ed.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 0x823c60306ca2240ac8ec792998de4e5d30d12b9a6adb44080f8ff303494a562f. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DLEB21200259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e13299ef0b5fe750372ac62c3dfe0828815aa6df899926b20cf5dc85edb2338. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/DLEB21200260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139e663d57900851a7960d4c46eab8f3d18beb52b01fa29f43b2e42bc4ef30bf. 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/DLEB21200262.
Trzym fason (feat. Hukos, Tusz Na Rękach)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37681fe323a2613032dde6e87c4db52e7ec8bec3c7a65a5e689fcf60914bf268. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DLEB21200264.
Przybywa nam lat (feat. Mioush, Hukos, Onar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4af363e19b462c65955b42e3f63bdc7be2f490538fd9f6661ea77a5e6c66e6. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DLEB21200265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569acbfdc4f180027ee1396d545a3e9ddc9988057dd11eae021d42ead28e06a6. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/PLF241401204.
Mike skiller (feat. Michał Kisiel, Bezczel, Ero) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa736909ef986c8c17407e843ae30532a1a812ce22adf37de742ebaffbb0addeb. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/PLF241401211.
Spe salvi (feat. Dorota Pietraszuk, Kalinowska)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7fbcfaed704a4ac4c5c41e7147c9bdbd7e1e9136ee69a92f5caabed8fd806f. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZFZ42322288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7eb48f17033e062909705c1d01b89d5eb21e1341481723870a44b8913bacc1. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZFZ42322290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e33a74e39f74bdc130894ec2f86d315237e39072f17ca53d241c346204923a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZFZ42322291.
Wieź się przez wieś (Podlasie jako wieś w mieście)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba5bc58a40b01766353e9c93945329ae1a9f201daa9841be95854f333f15b95. 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/PLF241401121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1224317437ec37cdba96e9b510de5f0a5737bf4d3b93c020a2a188682e567fae. 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/PLH181200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a45a96704d619bad40e6168249aca964ac6fbce9ad567c240306e442408c1ec. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLF241401103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8de7406fb6028b6ac37dd66540c38cf8a17fa906a291b4e6597354efff514b3. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/PLF241401112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed893d4d52cd2ac7b2fd74f48d3c0256b5cf77ecd267f32fc197390c1cced95. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/PLF241602349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa285c402bf8b43fae334f6f93d5ea2864924f4e31d909c17d742b95375b4056. 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/PLF241401115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c1688d3f75e41dcc438617bad32d0bdef21b59007afbba8703d25d4fd513fb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/PLF241401128.
Papierowy Samolot feat. Hukos / Cira / DJ Falcon1 / DJ Vazee
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a71f2c6049f7b5c900abefa5daa394a032a5f54c168a559985648d920924b1f. 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/PLH181500511.
Most Wanted feat. Hukos, Cira, Bezczel, Jopel & Zbuku
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ec07445be93cb878e60eb9150bca39311a3117c364e111c8a37ecfff87eeb2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PLK561400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3472e1580e6c308d188a70d2aec4c08bd58f395084a9bcc14ee8a5e5cb3221. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLI368384000.