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 0xeaa724cba7b22523c82a3ca7312655b5bfbbfc33ca70fac7ad559affbb1e7f32. 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/6fcdd535-0673-4a85-b360-7e19a3e8c892.json and https://artists.proofprofile.net/proofs/artist/6fcdd535-0673-4a85-b360-7e19a3e8c892.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 0x2a75c48bb2effbd817f9069b3ff7cfea41a2f28203b519c9af75cad6c944f19b. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEB110903509.
S Wältall Trampolin / Än Berg zum Zmorgä
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d56e2cba0aed9160f5cab2f3f2ccc9bb82df44263d928282d860f255522316. 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/CH1682100341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1910cd75452a2c728d3ddd085d7150cfc9ea2650341b4598f00b98fd9f289a1. 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/CH1682100342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fadef461285097f39bab3f388b039729773b6e8cf6aced07a0e4c6413131bfc. 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/CH1682100343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75688c680eb65fb82e93d707765089d811745c4e943311a5eb7337c658cf1007. 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/CH1682100344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2b43d44bc134535cf98182c0e2f2123fb51e709db2dc1d658d6911fa41b493. 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/CH1682100345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86b5d0f2792862372fa9adcc19f3f41838c5a757f1138df03dacc6aed26a29d. 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/CH1682100346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975e957d9473a9858c5905d5b17b2428aa715951c4bd3a317ae9f32d49e34a77. 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/CH1682100347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831f64d82c71a94c7f42ecc658a17ce47b2c23b7552e52835db99f18eb66d6d5. 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/CH1682100348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654768155b8b267cc5cf4930436560b7e4e472143ac6cba1dddc2c39ff258135. 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/CH1682100349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224731c265bfc7c74d98ebb1ee56a36f67f9a1d813483e450409184999b7a5ad. 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/CH1682100350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde637400b2a01fff210689d5777403742f76ceabbaff3fecd807ce2d665a09fc. 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/CH1682100360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25f0d1beb266c1c72bcd1c26689ed3f5147f9700316b3ab916d3460eb577ec9. 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/CH1682100361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2d6a9b863e7f16f673a4e9c2c5b56af3ea63fc096edf95d27a1da97844a2d6. 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/CH1682100362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5af7e2ef5a1c16c9ef6903f0b842f9c58e30d0472e0e0cea234781be7551e4f. 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/CH1682100363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2b55038f622073e04f5217a951d6a93b1ada63d7177616612b28baac4a1e59. 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/CH1682100364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712fc79248d4f0fb7558e9e226778fe2ec80812c980a6bad69451b08e5944e38. 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/CH1682100365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb2c319f8e06e5075aaa045b65affc2064d9713c3f32527ac7eae257087463c. 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/CH1682100366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16daa569581cc9b8704742fb12720227c4f3ad5fb20e5304bb51a754b5f3eead. 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/CH1682100367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79aa9a4123d214fbc5efce1490ad025944f69aa60af48dac2a6373bf2c348c4c. 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/CH1682100368.