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 0xaed84b2bb0ca9137d916f2ae761713ca29d0303c392967ba4a81b60bac8dcf7a. 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/6b02fa2b-cabf-426d-a72b-337b0296b711.json and https://artists.proofprofile.net/proofs/artist/6b02fa2b-cabf-426d-a72b-337b0296b711.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 0x0d5a71777217b4bee8ec9e0aec269efb87efb7d0d121c5510aff6a73a4d36cdd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TW2498891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89ef7c23c261d9f239c8b68687c5914354e9e88040e6dd3ebbbe9ba89fefaca. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TW2498904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab69e99aa33fc453625f03bd9c5b6c472c019d5b5c8cbb1ccd116f857fe6522. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6MZ2430682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4d789a9bd321a664337c947fd4e3578e35ba1c4feb56a4b74db7de820b36c3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BK4DA2409943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadb67be6b3534fd85d92b5865d591a6b37eb71296de2d9dc2511a29c6b4425f. 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/QMBZ92311457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac197f05b9a8f82486a9afc9fe04ce9711313df2fab37a8396a777f3c8f835f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CLAA22400194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e8e792c82f069f37662b419467a992cc9016e021d05cfe438e5d680cccf07f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2490569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934b43d5179d0c3b9a7e5da8ba29d7fba3e60bacb9829b5ae7d6207e66835058. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CLA352300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd23aa26a48e5f86316d6fcb9d1db0de63f2e1efc63a7ddfd66fdd890032073. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CLA352400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934b43d5179d0c3b9a7e5da8ba29d7fba3e60bacb9829b5ae7d6207e66835058. 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/CLA352300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a738c18fd230738c3c2e2bde2338aef7b7d6a22957aad0dfd49194515675f1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMBZ92412888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372674421d91007a07d18dbda79aab61344668d71603a699ba28f782e3ea47d8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMBZ92412885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa089b11eded4cf5d8c9763a8219100ffc43cf25b23f872c1aa1f3b85963ad9c6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TW2558784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8028cad76f89e98dad3272b09d83123cf259d44f590a460cc0d87c8e3826d84. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TW2558806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf186589515ffd638c2501475f824d3cc7acc1570ff30ce3d24f228acf646e749. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TW2558772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570ec4f26f833edfcbb978e4858999105dbe40aef1eb3ffe7fa63b35bcb765f7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMBZ92495347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f74e0ce8ebca5c2522147e94844bbdb0b53b3ca0e304a935ce2ffc6ff45f8c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TW2498888.