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 0xe59ed331cc259ea287397bea47117356f3fca6c6d37900f3b309304ce13b9cea. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ace32a5f-5887-4d5f-a7fb-b6ea189aa051.json and https://artists.proofprofile.net/proofs/artist/ace32a5f-5887-4d5f-a7fb-b6ea189aa051.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kaos-Duo - Ällas Leberkäs (Schwäbischer Humor mit Musik)
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 0x084de440dcc801a431cf5f6d508785f1b64edbf12902d9485680b3ddf27ba249. 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/DEBL61425530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b21ec79760d06a746a3c763ad14f54c6de1c7683817ac29872228e78a847f7. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/DEBL61425532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea5b4b62644fd9891fe3c41f50a5d81587de3c53fff5fbb06673205d830ab19. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/DEBL61425538.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ef232a6683db31d7199b3d8f7aaab80812f4354d7bbe415dad7f10cf0ab371. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEBL61425539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ffa90506e1b5846d96618d0bc56f8f3b195fbd741a255a3853e245b9280de2. 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/DEBL61425541.
Ällas Leberkäs (Schwäbischer Humor mit Musik)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3992b50618f72cbcc5f5a4b7dfc5ae7427228dcd4908f5892d0d654f4712ea2. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/FR10S1456582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78d24c44cfc6fb5ed0d1d659bf39b2dcc7e42df9bdbafece40786aa6003df2a. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/FR10S1456596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0911c5639b9c83c15654d465c62c650956c80d7366c39f3f2a4dbca938a73c6. 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/FR10S1456600.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d8defa0bb98619d5bb94e433ebdfcb574969cbcfbbc0b632f3d3af2fc0b080. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DENM10500113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f39414713ef11b7389ad28d7cd6c16aa199b20acb5b1595e6810eeef4c1a36. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/DENM10500122.
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