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 0x2d86e5e601d8c9387418f9e652d9dc0a62f0205906025ffaedeacfd860c780d3. 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/532e4594-2774-461e-b6be-2af14feb4d2e.json and https://artists.proofprofile.net/proofs/artist/532e4594-2774-461e-b6be-2af14feb4d2e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ondřej Ruml zpívá Ježka, Voskovce a Wericha
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 0xf47519d419c7a36f107050c0d2888a76f569528e929b321e95a090581668b822. 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/CZA231400230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb7e8168cc4b6df8c75007aa7976568a8ff184264473be6ad252eba945c66dd. 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/CZA231400231.
Tři strážníci - feat. Ondřej Brzobohatý & Ondřej Macháček
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ae7cee043f197d3149e6f21b806d0d152a0bd09e17c4c6ba9c4e73c2fbca99. 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/CZA231400232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5aa43724544d6d20ce77330eeb5c4350652507f104dd08b2581c80ec6b26bf. 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/CZA231400233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e07c4a53ed316f3fd60f762943b89c8a4f5f999869578e05ebd856c7f5d4df. 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/CZA231400234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1da62f85f43ed8358f1d47a8baa43450904d5cea59aa31fac150f9e4f9d2d50. 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/CZA231400235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e658cff07e47fcb350e760e4809c5bd87ebc327c368b78b74d323825fb2c09. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/CZA231400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bf8beae6f93f38c5efc7523ba25b1829f679b1add9aac0473ca83ac74ffa37. 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/CZA231400237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a98d9959be082d65fafe627b4c399a3b68c063a8cc48beed2555f463f9a969. 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/CZA231400238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf74f9bdc8b3bc17390a2864ca477555c419fa6b9ea95a2f3e56aac25a7e42a5. 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/CZA231400239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfda0802be99c9c7df6ba53f65cbb89b52f2e504266b69acd6b0e642adf94b7c. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/CZA231400240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b8774de3d69df60a87935b2249696da2981dcbe0cd81d1160c197b0428d0a6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CZA231400241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca9299d5214457db7e35c81f32ceba6975f2992d009da3c378f5c33e6caa834. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CZA231400242.
Stesti zdravi ane Tak trochu vanocni pisen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae6d1df2e0772505dfd42e47fa6a9cda385e01a9571e78640fab35cbd78488c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CZA231600248.
Bud pozdravena, Marie (feat. Boleslav Polivka)
Uz jdou spolu do Betlema (feat. Boleslav Polivka)
Zapomenuty pribeh (feat. Boleslav Polivka)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0aac92b8fb4925e1fa555053b642034eea87e14097cf8c6705561acc4b55c0. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CZA231800456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fd187b93d41fde07c15f522ec8432196e299eb4adae344487989b9530a2831. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/CZEG52412002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a4cda78decb71652bb2c0ae184c585cf0c82c5eb7350f032f2c47627901046. 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/CZEG52412006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32932ce290e3782b265e5bfcc104a50210fa01b8f47d845d6e6d81af9e8505e5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CZEG52509001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d879dddd0979e02cce21a3fd20227cc37d4b524336d0acf9eac0d5ea9eb9d39. 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/CZA541219706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e85b8b3aeebf7ab42ea69c1c76b27e9713270268856cef9001401172b1b7f4. 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/CZA541219710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b46eec685448290676396acc7e4ce418bf11c0455decd5fc63d17c973e85e8. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/CZA541219711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50e1dd51cd622c4c348efd28ab1ff0d32107b486ab063992203776afa5d9591. 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/CZA541219716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701d1c5738e44b662cadfe5b4e62660d00091961c95aa35157227e0f87a7ff8e. 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/CZA541219718.
SLOVO (Hudba k filmu Beaty Parkanové "Slovo")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd6a749824d31ea89097f5498fd1dbc5171c727fbc68fa855f51a91dde21769. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/CZA162200845.