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 0x0ab275cfb59a53c61a49153ffe57d16aa50e6f1da968068af96e966a4f77da80. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00ee3e08-b19d-4f3c-ab50-08d20a7d1603.json and https://artists.proofprofile.net/proofs/artist/00ee3e08-b19d-4f3c-ab50-08d20a7d1603.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 0x0af544b24475ca6accd257b79d8f92eafcc8af4ad828269926b0cc1fddb6d5a0. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/CZA659251597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9f14a78b7b0638c5e4c7b971460e15235ed95d312ac5406a6805a55eebc672. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:20:16Z), 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/CZA659251598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fde40581d60e14f6cc798a3947cd6253e50820557299803c1a557e7a43ad41a. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/CZA659251602.
Vzpomínky Pošmistrovic Kluka (Nejhezčí Písničky Honzy Vyčítala)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a917cc66098632e6e8987de1c02556a6095bd2d15ad48f82ba875adbd36f78. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/CZA659151889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c8433537fce52a1c68a95e43c72c73a05f933e87eb2f0d24de4a2cf2a48da6. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/CZA659051584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e13bbe27d6a7d867e45207334c906c94067f2e984a903600a32e5d6eefcbc2. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:33:47Z), 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/CZA659051586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cf69bbd69940bcf2e7bb24f316243dddee232eb7217b188c5e62da67136492. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CZA650905158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e9cc6b28b61118f57f589d294e9b25db95a204159683ffc079ec5b788e0fae. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CZA650905159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480c7b621bd8f3b5794b80fbe33a75af63306a59381e0068a30fdf0d44542321. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CZA650905160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeef7cfee3fa93e708e71b6e3ad33ea6a0765fff7c1a9acc9976f97930df60cc. 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/CZA650905162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde7acb711f7b12cb8d5ec509e249eba871e05ff5b4a02507bbd350040f8269d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZA650905164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc79d06b1c915a78dafbfb8469de3dc82f842eecd9825d1ea5c595dd571824fc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CZA650905166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5c567ec41139d75d87c67cc6a412841e8ef6ca409c59da02fb40d6d80c6172. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CZA650905167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa56b36ac9dfe339cd5b9a7226c13dc22a9145de7e0b2e4dd37014df32bae0c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CZA650905168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9f524c5b4c81e01be8a1396bcefe6be2df61da8331a5b94fbd7f1e19447b5e. 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/CZA650905169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ec07dcd21c22e7def14e887a10a3127d9a58a4c23fe5544fad8958fb1da91a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CZA650905161.
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 0x1a0ff8a46e57e997ce3fffd76f10282a850873b2c88512f51e823e0437dc7219. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CZA650905171.