Interia, formerly Interia.pl, is a large Polish web portal and online news platform launched in 2000 in Kraków, Poland. It is the 4th largest online news source in the country. The list of its 130 se
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 0x1028571e28967ef7a89cc9c86f1a9d0d63eb6c81478c399b6dcda36173d20fe1. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3deac698-c85b-4aaa-9288-51d0526c9cd9.json and https://artists.proofprofile.net/proofs/artist/3deac698-c85b-4aaa-9288-51d0526c9cd9.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 0xb5c8e8dde02940d9977545f393ff26dc87be83409413d368d0899ea409e8f2ba. 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/SE6I32212061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7492e7e7476cbf3571860a90128bd21754a065f900d8ace802603b46aa1fb1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6I32228266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7993896a5ad8acbb319c52e4db8d75028c31ad9305ea3576bf0020286c41c30d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6I32228270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ada755c48fdb85bbf156c089f872755f740efccdb681a0fa653f01b6f0678de. 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/SE5BU2514994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c851e66531a223facbd6dd76bdaa64f696fcf911538b48260b21363035b3d8. 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/SE5BU2514995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83afdbf307aa2a5fba86219440d88706f0ab784865b1b97ed47ce4def7aee164. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SE6QE2478996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379f5cfd6cb6be08ced590d979469912f958edc60554ce4347cd1eb41b4d4ff4. 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/SE6QE2478997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2bc59248018f12847bbf7bea280569c141d12e6d9b50ed620eafcd5b10892c. 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/SE6QE2478998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecf356d91df89ec5b10af56247232eb0b219f5705646de3c846a7b83534ddd7. 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/SE6HN2485312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165466a501a9a77528d7006fb9c60d3d785abd2b31f6b48f30ce97b8f260087a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/SE5752440035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7060c1b99ed4a389ced23e48576b890263a2f9d2bb6d19eb7331e0dc9af00208. 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/SE5BU2430182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c169e0a6c794e81f0d1b230840b004ce44572a7ee660baa4398f44c1e9df82. 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/SE6TI2370304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6b763e60e262bb03d31591c421281f46a0b317788ae81040a6597cb4beae44. 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/SE6SA2352393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165466a501a9a77528d7006fb9c60d3d785abd2b31f6b48f30ce97b8f260087a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/SE5752440035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7060c1b99ed4a389ced23e48576b890263a2f9d2bb6d19eb7331e0dc9af00208. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5BU2430182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7060c1b99ed4a389ced23e48576b890263a2f9d2bb6d19eb7331e0dc9af00208. 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/SE5BU2430182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6b763e60e262bb03d31591c421281f46a0b317788ae81040a6597cb4beae44. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6SA2352393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c169e0a6c794e81f0d1b230840b004ce44572a7ee660baa4398f44c1e9df82. 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/SE6TI2370304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6b763e60e262bb03d31591c421281f46a0b317788ae81040a6597cb4beae44. 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/SE6SA2352393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8cf993731a03947f7712277fc822d17461fddbc24adb5619a96ebdaa76e8ce. 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/QMFME2229782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7435b3bedb6e84f1228aa3f5d4e537165163bd4e50a4375b4ca12105eb66f8e4. 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/QZFZ22451553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6464bd8d6657062f13f9942c4f9957627c23570bc1c066d18cadfc7be53c0d. 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/QZK6N2358841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3297ced283684c30a7df564545a2d88b1bc0ee0d1b355d5f56e34fe653404e34. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZPLR2402272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2769d8707536033a3736778a63e2be0ead7bd7b736193d41759f7e7bf30efb0d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFME2229766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f309fd273cee53684df61622c90f9df03237a2b516bf069c903c265e24d626b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFME2229768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4760e1f406c81575f6db606803f53470352745ccbcabd7caeae27100b0b9d783. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QMFME2229844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804d6f1592413b8f8d78ebb62fb5e04ef06d789be98c11fff9b76cebb67c8ec1. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QMFME2229852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8df5b6bc6cbcf40b1193d2683179149bbf011499295d7fcb6e030f2b9282880. 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/QZHNA2402025.