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 0xbefe30c5b6d59a522e071516fdd3c482875f471d2efe7b35eb532dab7d58d16d. 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/a50a3e1b-56d5-42fd-b6f4-cf3202de841d.json and https://artists.proofprofile.net/proofs/artist/a50a3e1b-56d5-42fd-b6f4-cf3202de841d.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 0x4017c6f7bc67b067661a8c0a67700a57ba5fe6bee859289f18528e28183cbd03. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:31:22Z), 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/CZA168800983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4648d5b9ec45b0da0042093cc284408c1580fd8ff7b2aec4e9d6fc1546c1974c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZA168800984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0402eb614da47d5d44e9ceb8e0c70793efd7a2481980a448c1e900050f1b558f. 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/CZA168800980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cce9bb5ebe01e75d054d8b319398e7f946844e0c3b48072ba471bbf0e7abc0. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/CZA168800990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d14d9ae91d1c8fd99abf10c8f5bbc78a955fef30279e0f9c86fd6d5df4cd46. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:48:52Z), 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/CZA163357214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfd0efb062e3315b974378ed6fe106f3422a01b85cffdcd8d19fe77e3cd45b7. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/CZA163357223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54abb126732c67f198472208acbf8666b420baf942d06b3801cc4c67fc834688. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:29:16Z), 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/CZA163357091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6f4d005d8f00dcf7baac87ceac610d09a0b801b5571af2414287882bfa613b. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/CZA163357185.
Jihočeská Komorní Filharmonie A Nezmaři (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee063a880785573a46460b1a01846552a40b6410ba3732ba591a39543e2065f. 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/CZA163357201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7dc19b7645d36c06c1f084aea473b83ed8407905f51b54599d1e489e6697d3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CZA163357203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb333d3054c91539cc0c101ce46857c9ae0f5c03ad1efc2039881d151243b5168. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:55:43Z), 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/CZA163357213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6df60a9ef5f9a7203933a00a4791c158f3c1e8de1dfb0d979ef937367b7f6a. 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/CZA169000003.
33 let v klidu - 33 legendárních hitů Country Radia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64ba86552e67dc576ae91fa04ec8d51b98a41f1619a5d6b988c33dcc150d487. 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/CZA168800781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a1936068a4e107c3d94a83a04c5a61ec8012692ae97a7b06c64861c2eec563. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/CZA168800981.
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 0x9f4174aa9d0a46aebce10e6ab9b1e4448bf97020661f20f3d90da474586edcc0. 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/CZA168900976.