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 0xf971973badea72f2e522a5261e37075b1f3f4ede6066dfc32a23ba8bc25ff3fa. 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/cdac711b-8d0d-4d9c-ad06-cc7ad7561a9d.json and https://artists.proofprofile.net/proofs/artist/cdac711b-8d0d-4d9c-ad06-cc7ad7561a9d.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 0x41d6188f0ac8c51026cfa135da519cebe020a0fe9e4c33d105d0f33cd25d63d4. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CZA381318201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a60d6409b3c4d9b621a7803c9503f21258ad0c500abb11f116d0b4853d169f0. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/CZA381318202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac5bc1e94a4e8f6e1866f4dbb60b381aa7b88bcb40bef30c988d2a18bf532aa. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:46:41Z), 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/CZA381318203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0c4c4645b83a3139957abda69cd7a86c9b27bb6cf811ef0c471381acc8c746. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/CZA381318204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cd4e763d768cf354615af20a5bac8dfc5aaeee1ce37873afcac72c3aa6aa17. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/CZA381318206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934227e26d5fda734775cf4f8434e686b6ec9d9474ca91751f04dc338422d476. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:03:31Z), 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/CZA381318208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf7e78a7a592e49cbb3850fd2b659686ee60feba7f53dbf9b6bceebfbbb447c. 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/CZA381318210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9747dbad88d5310e44274b22c729f94639e2c8f00a6d71b32743e0bca79129. 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/CZA381318211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99795d79775bf54d04dda7cd1733eafc02882142e468d96f3a6c91ac0881217a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CZA381318213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a627af97806ce08c45dc0f47d280da0419724cb7a591d9eafefbcb243725df. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/CZA381318215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb4bc735645bf87b4a3b9205e51207efa2877c9e8abb249e1596ced3649f783. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CZA381318217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5cf3b6087bfccb499a4ef270b345716b2a87a282f8fe7a1aa60405077a8ec5. 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/CZA381318219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a0cf100702dfc354043908cdec141264a5d4e25a181263f8a74cd00bf8806f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:29:48Z), 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/CZA381318220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff4f0cebf16609f1c91b7d6e6630a64bdad44c79e0dc8e35411c0ab551ac534. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CZA381318227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7925e0178cf40115c965013efa0798f5b8e433c03de9fff843e559aefb69b18. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:53:57Z), 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/CZA381318230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab79fac032c5ea9623789e5bd67a226a0dcf1494a3c30dffba539a1377e1f6f. 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/CZA381318231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb1b980b20acff2ec510bf87a9be7bc29b56d4b4cc644f15ef3aacaf4e24450. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CZA381319212.
V hospodě, Vol. 2 (Nejrozvernější Lidovky)