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 0x906f3e0cbe5f84721777217fe99e6a46de831cabc10bb16ea1dbe0949fe46bd9. 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/aeca071c-a702-442c-93cd-b9ac0ff3d9d5.json and https://artists.proofprofile.net/proofs/artist/aeca071c-a702-442c-93cd-b9ac0ff3d9d5.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 0x9b0d385e6326f7eb92782085e8d30e61c75569a5e4976fbfe89f848312dbf4d2. 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/QZTB82361820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7344f314cf47c41186f150ceeb7efa1cafa956e6e4c58abd0a0a14bfe7f84192. 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/QZTBA2274779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc6a344f372dbb9a4ccfe9540b0e08e671191905b18f5ae81878ffd6adb9804. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES72221654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27cb2fbee1516ca0b19be01ccf71c9da3efb785ab450d14d5c87f5a38be1500. 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/QZES52236018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6369b8bbbd5e22a7fb5345e6fe0841c6448f33ea48c2af054d7c6f6207ce56b. 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/QZFZ62232288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027069290efa68fa851bb343cb95907b13aa9a02855d436ce1dbd02c53781e24. 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/QZFZ32254613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bfb712f20638f6d1e0d1195ec4b846f727077643c309621b307ffd20738d1e. 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/QZPLS2157836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673450848fdce444118ca25c0c5ce41161f9d2a81762df6fab26cc7422183bf5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWZ2132174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2cb0dbc862ce036f0f0bab2b8b16b804991af9943b3f90c686e7cc2951eff8. 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/QZNWZ2110508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1cd0d1f0c288e903997dee83f50953c8e0965f3dfa646049eaf82f252aae86. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6N2193617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde72fd9f572b3c9c43d37b5b2183cb64ca54b8cb80c41455493dd74d4ef85c3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZJ842002474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313a3cf060c988f5aba22557497634b27964ed71b42ab018f1ab06e00359ef5d. 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/QZJ842002475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c678be1be6b76767670b94b10d809443ca2108ab3918ad0e1d0f35534f05e8d. 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/QZJ842002476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6d5974116fe78c27a3cc07ed1f21735ba8cfdefb64225cd6a4ff408fea6b11. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZJ842002477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb237fdaf2701480fd7e4df1ff595decbd878c2c1d686c3cf75990bd60c83aa46. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:04:14Z), 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/QZHN62236389.