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 0xb2c931f387535f9f336d4a0e08441d396b310c1b5647b32ea1d25e94fedb5305. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b109eb7-c019-4051-8a67-599d4594b5f8.json and https://artists.proofprofile.net/proofs/artist/7b109eb7-c019-4051-8a67-599d4594b5f8.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 0xcb5f838729f145dfaa6cc2aa44f9722533928fd7d371d3c02bc1a668cda84aa4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CZA541008515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5906022a34dced662778fb9630614a6c31d9ae3bd152c1e6abde2eed15624ebf. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CZA540789806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee14ba71e556ec94bc8bc1bd17018b84e5e0abdc55745c77ae659cd5c2c1e8d8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CZA540789813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d916615ec1c977852ad137735c5e25e19711fa38d7470bb3910602dc9e72e72. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CZA541008506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05534af6e81eb8c31c47ba95673a4a43435a075bce761d4eaf594feb095a7e7a. 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/CZA161441397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3031a4b00ad979a5ce0856124ca63377795d796d2ee41e8a2c319a1623b94850. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CZA163352102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56058d2b63f2ca3edff1d950d506835f6b6057ba2ccf5fe873dc6416f4550e60. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZA239700373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99394c2e1b3c935e9e63f7fefe79a9b0ffd8ab05ba42d9013c97ad21223dda23. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZA239700374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe00b1dd8a5069a533811114413b8f26fad4458087a75d0b98b75f1c101b7c42. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZA239700375.
Tam do vecnych bran - 1997 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b77f7b15f6957d0499117b1ffca47fc61f75135989f6a0efa486f1ba75adee. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZA239700378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30786102c0ad90c4edb35d5ea06c21dfbed938f3f2728fbe268a9b5fd06c3543. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CZA230800486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56058d2b63f2ca3edff1d950d506835f6b6057ba2ccf5fe873dc6416f4550e60. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CZA239700373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99394c2e1b3c935e9e63f7fefe79a9b0ffd8ab05ba42d9013c97ad21223dda23. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CZA239700374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe00b1dd8a5069a533811114413b8f26fad4458087a75d0b98b75f1c101b7c42. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CZA239700375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b77f7b15f6957d0499117b1ffca47fc61f75135989f6a0efa486f1ba75adee. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CZA239700378.
Malý princ (Original Cast Recording 2022)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb962eafcc1e32616677b97fc3be42e4a2d340669d2a1771d8df6b2fdf2a5f683. 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/CZD942200193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0f15152dfaee2d86e42cb858dbd29aa11387c3cd38d54e5c4b64ba805a4836. 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/CZA541113615.
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 0x5b20564089e86a6638b5b1f54edc3898f2a09c498554fcc6938fc06f868bd806. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/CZD942200192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7fc142f4f610f967f395fe9a42476573bab7c8d3651d553dacd59416ddaf0d. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/CZD942200202.