Jiří Grossmann (20 July 1941 – 5 December 1971) was a Czech theatre actor, poet and composer. Life thumb|Jiří Grossmann with Miloslav Šimek in Návštěvní den Grossmann was born in Prague. After his gr
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 0x9e009befc0103d66fcbcbadee76fa02291f8d52ce5b8328ebf236815bf51b2c6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad74ef02-6104-4c51-bfc5-8aea801ee6f1.json and https://artists.proofprofile.net/proofs/artist/ad74ef02-6104-4c51-bfc5-8aea801ee6f1.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 0x1d12201df27d6707ce67287be5522c5b39646786506422b85f2326cba79c541c. 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/CZA160901257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eefa2d935564bcd19bec758fe80b3f01fa5dbc9fe159341ae118c82d16ba069. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZA161301351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1c6c6a0cef425ecb5ccb147b5bdb2255df0579081136d5fe1fb4f1cf65406b. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/CZA166700088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec6f64b4ba5c1e07f299f42f27f591b0b3b9722ada676c8c37b96150a68530a. 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/CZA160901261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4184d1ea8af1fbfe9150307651e933a31842ce063b4f220229f42b3bf2a700be. 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/CZA160900926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae5f61d95cbee9f3b694975ae309ae89b6f253cb29af54febc34b3453b90e6a. 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/CZA161101547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdd3cf5cd9c9ebd0ea0bf6dcfe9fbb414daf04d9f7a8867dc7b586029d8be40. 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/CZA167000400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ecba7cff0d079c7056be09aa6a618f9ba8b8aedab5cc9f45babc28b31262b6. 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/CZA161101691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534d71e79cd74cb810501fbe937a9eca870971d85895216e8f5888e0e10f6765. 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/CZA166700371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c065a0ef0e0fccfdb3ee2f4726ff77ab4c3987a82d626327b9aaf6d7395f84f. 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/CZA160901256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d12201df27d6707ce67287be5522c5b39646786506422b85f2326cba79c541c. 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/CZA160901257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402f498f403844b4d9f18ba09dc4088fa09041e56b8d85af316897bb0fc20a41. 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/CZA166700298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20df2590f68d1d750f2fd8f3b19c812d23749221d19db256b8da6d17b5a39ed2. 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/CZA160901258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968780265148159c1838bb6c5e42b62a459de591cc88cd28c8830d6ca3eb05e3. 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/CZA160901259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ab0f2cfc25860aa0d2f07567e6857973c8a5ea04666ab7ae3a9a8eaea1b925. 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/CZA160901260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb480ade47dd372d085e8259dc2a0891b688f8155137f253748483828805a5c. 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/CZA166700566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec6f64b4ba5c1e07f299f42f27f591b0b3b9722ada676c8c37b96150a68530a. 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/CZA160901261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd27b3ecaf49e0afe02bcddb468999286b3f9e5905cb1bc35aa9c9d45880a2b1. 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/CZA160901262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1c6c6a0cef425ecb5ccb147b5bdb2255df0579081136d5fe1fb4f1cf65406b. 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/CZA166700088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffb57142306ffac7eac5a862d31c7611e0c6ab795d7dcb158e9ef78638fe55a. 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/CZA166700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0051009087905ba483907b85c64116680677893fe8c2d61a57e896ce696ff81. 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/CZA160901265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0896c8db51b633a559f1b8a4408ff8d737828f0c15b3a2a419cc7ece8e0bba42. 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/CZA167200474.
Jiří Grossmann (Až Tě Náhodou Potkám - Zlatá Kolekce)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dfa308b5f2944895ce1fdebcde002c3bbad2858769b2a6e1dbc89bc1b6ccc6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZA161102365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bf68a4e18a614daf30756fac260323aa1d06a1360f5c93896600152b2f5d85. 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/CZA161201627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4184d1ea8af1fbfe9150307651e933a31842ce063b4f220229f42b3bf2a700be. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZA160900926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb5991a6529d69bce7f02787f8af2bd7b9ef754ee3012a2346918f4a5582d8e. 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/CZA167300412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecc9cb5c2c7b767ddad4ebbf41e3275934758220286670d60e736b7afab8124. 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/CZA161100542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402f498f403844b4d9f18ba09dc4088fa09041e56b8d85af316897bb0fc20a41. 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/CZA166700298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28be3c66baeeddb1fa398ccc6049024ef614ed860d7efb633e7921412854efca. 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/CZA161100675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0051009087905ba483907b85c64116680677893fe8c2d61a57e896ce696ff81. 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/CZA160901265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d12201df27d6707ce67287be5522c5b39646786506422b85f2326cba79c541c. 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/CZA160901257.
Aurora - Parodie Na Píseň Bum, Bum, Bum - Dám Dělovou Ránu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3845c5159005d42357535b9408c3b8de3759fbb6db30b91c162ced24c222d9a5. 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/CZA161102361.