Vlčí jáma may refer to: Vlčí jáma (novel), a 1938 Czech psychological novel, written by Jarmila Glazarová Vlčí jáma (film), a 1957 Czech drama film
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 0xab6f26d7e0889093a135b4048922d10732e0f0f44694d451a46275e0f1d0bd73. 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/a8ab65d7-4a3e-42fe-8027-551ca036f5eb.json and https://artists.proofprofile.net/proofs/artist/a8ab65d7-4a3e-42fe-8027-551ca036f5eb.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 0x020219c9e3d9d844aa4de6038c6c1fca44164d8da54ca757d2e7a463f991acce. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHNB2299434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3b166ffd745157c08fadc1cb351a981f846f4eac9ca752fb6692c21c3054f3. 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/QZHNB2299435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53232f1378d1217a2c12d6f433327eeef77a8f4200026c34aefe1e221888f66b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZHNB2299436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bc7006dda2406c1cb8a99ca9084023479b28f220fbc93983a88e0e53745c53. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHNB2299440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ded4f277656ea562389ce5dcace3e3f3646417edc0cbb56324a2acae42776b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZHNB2299441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e24f5570c0807942a442c90f245ff52ecffdd164b40f27a74d8f071059f091f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHNB2299442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e93b7dd94712a4686709107dc8f3e15761f5a91cd051048cdae893947d366e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHNB2299443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609a7a78bc20824d998d9a068198178783a44860df8a3ac0dab2309cc3b0c8e4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNB2299444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ade834b42fa834b6ff5ad6c2016b2e4baee65344960adce853ad579aa109af. 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/QZHNB2299446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb038f2181e6d8cb34f991c4c42fe44f3bf921c948349ea3454deefdb5c0b75d9. 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/QZHNB2299447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ce625da0bb5d707589c856efe653274b8fcde7dadffbec96325c777c1a4b35. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZHNB2299448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdc61f73924e4e02ac34e6a9f969c71eca2cec16948a54074b935cd12d5c86b. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QT3EY2420057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6086df0c28f12b5755f7e4bfe8a0f805ec0657bddf8021671ca6365347f3559. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QT3EY2420058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72d648606208ee2c6f20c2e3cb1791432a5a8317419a574a5a4a8bd323b3270. 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/QT3EY2420059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f427369bf6cd1841f0a9cc4f70f1cb059baa48e463f4c240b2fa352a070c20a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT3EY2420060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53628c7f3d63c568a1746a71e7ff7439b066784dc1699d21f6d6b0752e7b8639. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT3EY2420061.