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 0xc4f0cc0f6eebac79f246eaf8e69fbcede7052a0204f1e0036a607f3e13b5fac1. 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/2cf6f463-b05d-4821-ad6b-28211b0df6f2.json and https://artists.proofprofile.net/proofs/artist/2cf6f463-b05d-4821-ad6b-28211b0df6f2.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 0xada96a7edaf1a644128efd2535f29c88d40aa782bf742164977d8e570afde414. 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/HUUM72100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa601e5372e490309b4de4358a73ae1682937e273e2f3e0303125bce86a613d51. 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/HUUM72100376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7895777a20d4cea71367c5fa6b362a68e0f49db55b9002bab008a4cf03a22200. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HUUM72000252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada96a7edaf1a644128efd2535f29c88d40aa782bf742164977d8e570afde414. 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/HUUM72100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165fa94ad30616be27193354a4a8f31543942545449ee8975639b5c14fb88353. 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/HUUM72100375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8a4068fc6fa3447967b1757159d7f582c3bc3c888370bb16dd9dfb0692ec61. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HUUM72200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d3177a10e7dc8163ce733d8ee5b00335fa5255b0e3afff006221b0a0875eb2. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/HUA612202875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf773ccd45d973970671e85fb03eeb81b7523e2aebe06686a02029748282bec6f. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/HUA612202887.
kontroll (a műhely dokumentumfilm főcíme)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c06df1fe12b948fbf93021ffed8249d53183e39785d6da15c4ef67579e84d4a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/HUA612401337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee61c3e9ea705b67fec28f1f7f42a009ab23541144609e94c7822e1212682bd6. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/HUA612401955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a125eda792be8cda9041a3c45b15c1a8436bb5135b703e0ce8df318eab88f6e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/HUA612401957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937800688301f23be9ac63f3b3c7536419b5246bcca3f7c9acd90d31e6ca268d. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/HUA612401958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6493a837cd689433eb18961823367d724fbf1bd37d253994eb09be638b13277. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/HUA612400594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738d741dfa3dd7a85a0f7c3fab948afb0b443e2c43a95440fad271be23ddd32a. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/HUA612401959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc781ff5055b8154cbdbafa02a72d932660cb43336bf5660cf7c3492a0c72dcbd. 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/HUA612303992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b669fc2e83a8aff79906d6fcfa33e726459a4fb687642c7daf63a6d3b1aa20. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HUUM72200059.