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 0x159d99b5bc0fd662d5e3283476c9f26b5f8540470a246958fbc2b363b304b0ac. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3301f8c0-967a-4492-96c0-298059c82292.json and https://artists.proofprofile.net/proofs/artist/3301f8c0-967a-4492-96c0-298059c82292.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zpívejte S Námi: Nejkrásnější Lidové Písničky
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 0xd4562a4981f03bf51bec66daf18639ec102bf5a1fa2b65231c0bec4be267b7da. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CZK431500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdd8bb9e28d2e7e762b838454fa4471554780967c472bf83704dae1bea9961e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CZK431500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a6f61f8835e23f2cd327fe18984957e204a3e792f5ffc09894bcd3ff83aede. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/CZK431500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d55b0a5b485e6386b90537bcccd4c4c351d900804cde8b5d95bd34e120f5d3. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/CZK431500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e94a86b0d7f985f2d08cee8f766503221861aa299bac3e5b7f8ce69b405000. 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/CZK431500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75a5532aa522805268a1908dfeb130b786d9f24fe971da978ae6efb492acd88. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CZK431500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1f74b0aeb4f13c03ff79ed6a1781a7632cec7b056ec1ac9a29c06fbf33ac49. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CZK431500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe685a62ca027e39e81b24dd865f2db83a39e25d7511888b108deb9d77b19c699. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:36:57Z), 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/CZK431500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07388c0bddf4ce467a7fba70df0bf0a4fef6817164ac1928c7226ded61055bf8. 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/CZK431500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308bf61a7599fd45be2a2cf6108fa7010ee9eda6a6a6e8ea2dfc7aa290dae8bf. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/CZK431500111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6eb66eb08a3e8ff35e9c682dfdfbd23ceecc02642694252c663e4ea90387168. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CZK431500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f1e28106d60add19451c3d3c1efcd87e3f4c5ee109f7b0b6322a13eaccede0. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/CZK431500113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f50517e56037af9152cf19cbb0b37bb8567f5e29998f1b3935b8ea17bcebd1b. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:50:25Z), 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/CZK431500114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6160c5c252a42549c5b24e1481a97d7caa05c257b5fb8301dae45c822b1ee63f. 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/CZK431500115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6442adf5660af4bbe8605778c8bfc8c494d5357f0e8fd29d9b0901fae32ae1f7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CZK431500116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad23ff4e394a6c178d31bed5e39de2740b5b95d57c58a7821a9e9fef7bceaed. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:24:47Z), 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/CZK431500119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862176b7f265902be6d5cb1be487414be160b4f535457c1c47d746058dbd998c. 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/CZK431500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f61a3593520f59ebca8a5226b9d2f4b5966e2fe9357d641fad8cd7c738c77e1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CZK431500124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408f8b37b9dcef0386dcff1c2031451bb122c0de1e7e280e65f53db5a3c754fc. 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/CZK431500125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc462f768f84170f55b1082be441ddb24c563543a8bd6f5562339297d3534dfde. 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/CZK431500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d630514bba3536d7f1ff6bf6c590530c9a8b5f8805a4a952a8dd3167d7e93d. 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/CZK431500130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db5e017681efbb7ae5323ad5d455e3878e300075dd5588f11cef7e5c67107fc. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/CZK431500131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558671c7a39edc8b486058011c761055f9f4a85a77035681ca3e0c6968d64d7e. 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/CZK431500132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a470b5015d7b7dda964eb388d18bd265cc087a399dc216911dbcb5406d613f5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CZK431500133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677fba29e5035b47fc8c17a8d400be0ae7aa0d8af36d13cf5c84c17e5dba7bb2. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CZK431500134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c1b2f2686f797898ee05c22e7cab84a9b8d263c7ea51cc68501ea79b504caa. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:08:22Z), 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/CZK431500135.