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 0x87d2d3ec75521d978995e32b51b911779a92d8436e163f2a593452de57772dfb. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3d5258b-865a-470c-939c-3a740bffde6d.json and https://artists.proofprofile.net/proofs/artist/c3d5258b-865a-470c-939c-3a740bffde6d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vyznání (Ty Jsi Má Láska Ty Jsi Můj Sen)
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 0x3a66104b9dcd991c766aaf92a23f07a546c7e5e2d861bc311bc9e7e0d7f5af49. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CZA650301737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb907985ee84bd826f30a23b0f33de5061c036224fb559e16e460ac64934101cd. 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/CZA650301739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69b66f92623f09aa629ed8222bd4c456e3f38498e9a55f67b8dace02dabf10f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/CZA650301740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2ff4d05b30011e5e4fdff67ff4c4f3ef8420249d5cd9b160b2636629be5c37. 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/CZA650301741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd322076f4f616f022ad9f3eaf8535bbf865f05d20acfac12fe7d3a16dccf164. 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/CZA650301742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592f090907b3406bf6b8eb2918ab7464a1f71720d20203cc23e658af8a3ee99a. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CZA650301743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999c22c33028d8cb16370656950295982b6d987eef11284e777f6fd2029f05da. 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/CZA650301744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10de5dd7a644e214a56832d4a6d553aab76c87dda3280577e32fef0e66e813f. 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/CZA650301745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312ad87c9776be727db2efc21e644f1b3a27de94ae26aa83efe0169d64cae18c. 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/CZA650301746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f7667c2895e1a2e7bff29e624521506e519c754619810a6b09f37067070ad1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CZA650301747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d59d37aa5bc6ec05ec946970140bf29d757736979c960e48dc1b9c36690a4d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CZA650301748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc766f6dbd32a9ca7b229a3aa07cf87ccb0f8517ba205679d9aee5ace8551719. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/CZA650301750.
Vyznání - Ty Jsi Má Láska Ty Jsi Můj Sen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b51e786f4531d0fda36d9c39689f06115914f8ce5cb5a8a09368eb70fb793d1. 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/CZA650301751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac86be97780ee8df616cd131143ee21676382ccbfe5f132f107de457d4dc709. 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/CZA168500485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389ad05acb59646b051025db28a8a05c6b169d1b8f44f8da28e81e3e8139dde7. 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/CZA168800305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8049bfe1732c1918fc3f855f9cc44a5658d6c959ecbae7fcb648472ddef1c251. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CZA161102174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13a87221470ad6cd90a31d333b26a10b9de1fb3c9ebec593ef8ef51876573ab. 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/CZA167100260.