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 0x9e5d365053e28d6bb7398d9423044a31258971046809e88a4a3beb19780b4fbf. 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/575c2c56-d003-4907-8db5-74fff0a3f362.json and https://artists.proofprofile.net/proofs/artist/575c2c56-d003-4907-8db5-74fff0a3f362.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 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 0xf5346ec9eecd6e0594fb252d297f11caab6b88c68be6641e27618f77c0198368. 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/CZA168900821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b8d30e9dda76cd70ccf07b88945d290591a23a1abcbe38071111fbf8cc48b8. 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/CZA168900822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203cc066e6a962175b8b8a1ff6765fc837aaf187dc7f9bf80d6130cc755d8d0f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CZA168900833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ae6b50d6b58f17f609a33fadfd033dc50b3af6440803a12cdce118bde6f189. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/CZA168900835.
Dorfkoncert - Mistříňanka hraje na přání
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15df49351f5719e20f1548b98036ee5c158eb40afebc4b671b5c520a6e4b5268. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/CZA160405029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e4b5d8adfbfd08a0c0f8780d9a1790e4044a6e48b3fd48f91f0d796707849a. 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/CZA168800676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396bff267087ed2dd3f5776219a5d6a6c4c746551c1868f4de4c9f9322d68703. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/CZA160405025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a07d3b7219a7fa4ff7e9cbbe7336ddc767d8042cee496e828d52743ad4e0609. 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/CZA168600942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8536dfc455bda131867232e19955102793bde6381a30e8c7fd838d440e35cabc. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/CZA168800681.
Mistříňanka - Našel Jsem Pramínek - vyznání textaře Stanislava Pěnčíka
Našel Jsem Pramínek (Vyznání Textaře Stanislava Pěnčíka)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663a2df0738ee7732cd2cb085c133a0e900e8f44696db6f467cb19a5329ce33d. 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/CZE561603903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf496d216c59388fe1fe3dae7c1930100ce18f6cc8dc943a7f9adb903bd1560ef. 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/CZE561603904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38f2bfe27d07e80671baf9417b92314f8e46d28231c8be6f240ccb79151d63f. 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/CZE561603913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78eeac86746e8d1e09e37cb217bb92f299e873d6249759805a5f95ca8b31b52. 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/CZC501761002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8d12bc6eb132ea33f44089aa67aac107b5b43bda568d9fa9336c20637030cb. 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/CZC501761003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad02bff104b3c84d48b0bb44e530269613733c38a7d37ea641b7c04a04f6e064. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/CZC501761005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd13eaebd5da78ed21f8d8dcb6f967a56cee8e281fe60c783b641b2d148db0c3. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/CZC501761013.