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 0x905dfe04b95e9db40cae4bbcb1b7e48b68668be09c7f851b354a8fa05da9b105. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83407fb1-f8e0-4a73-9343-950d4b06048d.json and https://artists.proofprofile.net/proofs/artist/83407fb1-f8e0-4a73-9343-950d4b06048d.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 0x72bd74967714197f9b81f6f65132e949e185d786514eb66d535f6bfa3fcb7448. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZAKB2463717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fb4c27655ed5a20db7a2ef3573dd12add7d8f707715b7a012428c2abecbe80. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZAKB2463718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3625742b3d4e5b0dcd12dfa34d0426064dfeeb0bc53cb7fff7a4ae504bc201. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZAKB2463719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0546dbd32e32af3bb515f82651f08ed8005800d4f74ff33719823eeae99dffaf. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:02:06Z), 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/QZAKB2463721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2c634fbee97c33f9a25e2b73060af5b3266bbc212f4fa9490784b62e422185. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:56:41Z), 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/QZAKB2463722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5b4786207fbb443d3d16277c8907466cc80d524526c2f84fdd2d6eba3abb4d. 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/QZAKB2463723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273f020b8e71f34e94ba949aacc36e756c037c2e1ebfa40b4ad0a672e8f29a93. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZAKB2463725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed9f9e0a5b44526b5d9bfbce4ace1a4bd3b13a1c5402d0e4ae7f55b865f3bfa. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZAKB2463726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4e3f172466f9659bf1ac4123826c1c6f9c0b484faa9df8fa393cc9b15d7679. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZAKB2463727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e079821b6c84bc41b4a1611bbb9f393dd2055e156faf3c86a11dd90d481744. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZAKB2463728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61aeff2ea3a255c95a93c73aa782fb20d6e4471fe4ca18e43fe8728b963cc97. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZAKB2463729.