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 0x7e799d0b0d75bc36d965e3b9774f94d8b4e229f2d9ad7c741fcc89e7e49308f0. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7bf57ac3-0d58-43e0-ba02-0dfa8ee80574.json and https://artists.proofprofile.net/proofs/artist/7bf57ac3-0d58-43e0-ba02-0dfa8ee80574.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 0x3d85ea1c400a0c28546cd83a23a58a8c349d9e2394e986acedd67cff66bdc28e. 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/DED431000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dea41992ce234574d8127919c98eb294a6974dce0ab742bf718b413bf2cf28. 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/DED431000800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec853b84903f140babdf21826f0f99288725d1639089ea40b7ee17327db2f9d. 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/DED431000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7b66970a0ed29041b1e77eee2678aeeb9cae26a6025c61b3fb5af5b2c7be96. 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/DED431000900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516cce506ed6badcc55134958497222ac2cb39329d5d98a934a2d6004fc5b567. 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/DED431001000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd18723c038a664ef59f7f2731bfc8abf1e542d41e0de9897b71784a39bc665. 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/DED431000300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da161b9f383d3155ffe52507ab541f15c82a98fb85bb89fcbf26b34bcee8370. 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/DED431000400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff51472d49ef181e217f848cc3f563c23b230e7df89427037023405a0f67f5e1. 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/DED431001100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116e87af477de3b661a69b611616ab6b3d4e74a35673398e8e81617e0c41cdc1. 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/DED431000500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcdf9115f1031b15d7304df72bb451c7bc045ca16211a5dc8170b908ce1b85c. 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/DED431001200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf088cffe11b19d103b78fc5687bac9f3a75f0e92d4bdd54209fed7d919f3f820. 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/DED431000600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c052f3fd7789c4a79ed1c9cb85db5ab1e439b83a8628e86de0464a9fd4df90a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DED431000700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd423a32b135b83f039e4edc6e7355a0a0462e7d2a386da610da752fbe503b0ba. 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/DED431001400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d95d4ec949ed4f8f667104ef6b914be78fe2313ed84dd254f881fbbfcec5865. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/DED431001300.
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 0x1a91ca78cfb9e6ff83f080ecd3fd5a618fbc51c5f600f114b9fa1f93986d64d4. 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/DED431108200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fe75d7e26fb07b857029d5fe92384ba38a970547a846111450a7a8326e3a0e. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/DED430092800.
Logbuch Das Paradies der Bekloppten und Bescheuerten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6752f4478bee54c3974214f702dc73c10a22f992db12f22b87c2c5b5ffae37c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DED430102800.
Die Bekloppten und Bescheurten - Eine Lesung aus dem deutschen Alltag
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9635379ed829e65a07b8a9a3312c8f4d7abbd7ebdced0dcc2c0c4d0aff3e1ebc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DED430302700.
Deutschbuch - Die Bekloppten & Bescheuerten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa154411b50c154688a09d8bf5a4f5fe114156a6e75485dbf5962fddb18e3852f. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/DED430511100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715b2581f31b1f60da51ff502bcca172d5c0e10f67682f42f034bae363fe3e19. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/DED430107500.