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 0xc2b5b77254b412ad0a215d88a64164729afa4236de834e6ac6107ef809c22a47. 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/4dbfe17a-972e-4721-ba1f-8fe8f7001fc7.json and https://artists.proofprofile.net/proofs/artist/4dbfe17a-972e-4721-ba1f-8fe8f7001fc7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bezruký Frantík (Soundtrack z představení Divadla pod Palmovkou)
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 0x00770047103f135bfbe5662e6c3b213ac33a75ad1efb59399e50cfc0f08a0850. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CZA163381583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafef772567c2665dd099b3f7bb3839aa02b4f9be59a701396eeeaa03966326c4. 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/CZA162300250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea9359cf169d6cd85a8c03e6ef7dace1107fae72f2b88e00a00464c96c2122c. 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/CZA162400159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00d3e9306f70235c31f52c37e80bdd393aee1ecbff7913631b4802165bd0e0c. 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/CZA162400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5188fce172babf499f03f9ba59b5a1f59eab97a5c578bb4d155f0a779e6ae29. 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/CZA162400323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749c224669ef980f5329daf2358bfb8feccb6f3f1193d9f82e6949bede59977d. 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/CZA162400326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1139da8711eab107f378b10ed1673bfc3d48ed631a97265581433063440a8db4. 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/CZA162400327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61923bff0ff57a56fa906d3921391fc449eb222332cf9a9f4025b0fc2a7b02ca. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CZA162400328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285919f072f2c294d1f73d5b8f4ce59c3c7e23230c9e36428eacb30bccdfc30b. 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/CZA162400330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdac86445e8507066051afd14580e34c36554104529e33bfb2b1170b71f44031. 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/CZA162400329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde234fcaf881da077e96b762171436c658178a0aa43c877b39b282c2e393b2b2. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/CZA162400331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0617c9b199ddbc9c69f7f2f8bce8198def0313307e75f8fcfb32e8e11fb3d3cb. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CZA162200161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1247e8853dbce0f87fea040818c05bf12f8587b868f6c002172b8b9b43c2b6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CZA162500954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89d302ddd08efefc51dc48d5e3bed3575b65f8a5d12ddce1743cdeb13a69a23. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/CZA162500959.
Prasátko Pigy A Kouzelná Pohlednice Plná Písniček
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a29d4b93afcf6793f8ac8758040ad9ad99c37c8eb25995ca27faa66c8ed992. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CZA163359497.