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 0xbe455e5d410cf3fef9a2b975f260e6efa7f80ae5939cd2be2eef6b600f6159b7. 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/41f9f7f5-bf5d-44e9-9d10-84c325ceb6cd.json and https://artists.proofprofile.net/proofs/artist/41f9f7f5-bf5d-44e9-9d10-84c325ceb6cd.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 0xc878543dbe8db272e8890ded9ac3ee47edfe19c71ed39a1e3a435a06ca1f3b5f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CZA231800439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079ce632ef392e38c982e841b2bd002582e04ec38228f146562af8df821cd572. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/CZA231800441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c45bc5392feab31355086ebd32f7fb2caf49276ec0fde0ef71da934e9b63f0. 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/CZA231800446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d38b9e4e9ca8fc8c2827bef66608ca866ed8f0c9e0dcfacec3d3cf77a1e7928. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/CZA231900335.
Žijeme jenom jednou (feat. Ondřej G. Brzobohatý)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70d51c2ae0205394cea8a7142792e90734d4fe2b91dc78d279e7fbcc8325ff4. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/CZA232000454.
Tam za řekou (feat. Marek Lambora, Natália Germáni & Cast of Princezna zakletá v čase) [filmu Princezna zakletá v čase]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d57f6f5725a488dbb58b01f8c3822beb4dbe619cf73e898b155fa56f4826a01. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CZA232200475.
Cesta z bodláčí (filmu Princezna zakletá v čase II)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122d83beb126f3fb5f9702d1191698e71a835f6f9a3ed2656092e1b76e9ef6ff. 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/CZA232401099.
Budu při tobě stát - Růžová Lucerna live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbc2252dbdfc832f3a94f291de1a38e2901436366584fbe60db58f6ba9ecce4. 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/CZA232401074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9faf43dff47af67368ad0ce323c44d25b7c831f54a8b8c76cfe1460b9f4e71a0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZA232401075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11be8593397b469fe0ddce0db2c6d87c8de624679a538b73ca1c213f146a524. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:39:36Z), 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/CZA232401076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf247a0a6fe94b50dd403a21753b2d5dad78c22c6637640f8a9747384bbfc55c0. 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/CZA232401077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3dd35cd64a78141ed418cfced7d57b304c1635f1c4d3626b0fc87dab9f4dc7. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:49:06Z), 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/CZA232401079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd11a61da3858366f66e0f9b37c6a235602200789ffc58bff7ae99dfd836a75c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZA232401080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8584fad5238f6f337f97a24f923adf74d1ce9bdadd3cfcc48718a66dbe4d7d15. 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/CZA163301122.