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 0x84ee906fecc3e2684b5cc994274350eef15ba19acc31a414297c58aca15ff250. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4dd1770-4ca7-448c-9e17-51504cbcb81e.json and https://artists.proofprofile.net/proofs/artist/f4dd1770-4ca7-448c-9e17-51504cbcb81e.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 0xeba28fd50f6d76426b6cd7f57d0b0ac28e3e44bccf3e42337d0a7252a9a6a4c2. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:39:23Z), 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/QZFYX2159137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afac6d945dbc7525beda687c6865c494ed92f5ee69bc3dcd96c1917357c1acc. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZFYX2159139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd7396d78a2889f117552857d6f1f4dd0fda7fc4bbe063dccc3ecc5ca08113b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFYX2159141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a859800e397b56735d132330678ae781863ebb5a81d9b1918bbd6a56ad429aa. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:01:57Z), 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/QZDA82170502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bfef357aedbf7e11089d8443844592cb984faf5a4c669c1a3030b6b0c174b2. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHNA2127749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefa3f86165a9d2262e49c72abea235f4bad99f7dd4f0673383612786d9d7135. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:44:17Z), 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/QZK6H2105998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dad83c2865a9365d301ebb7a5fe8c8661137c1ec2d550e7f65484747d304fc. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWU2159608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f78fec910fa7ab1aed6dbd6d278d0438598860253d6f40dff19707ae9f53d65. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:47:28Z), 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/QZNWU2159609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6ee960cbd4ebb06fbdac9b5a9de3d0eabe007accc53bd919fb2516af07bea4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6M2232308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7149d7effe603e9d2986a6e2afd32073f172725295f58d881a095248b066ec. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZK6M2232310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133099e634040382f91e1c0ffcc39739ad043e40b4a15dc367afde959d0f4ed8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWS2228836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031e41eaf4462cf2deda9aba927746bdf55db9fccbc489d703e148205ed77c77. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:01:19Z), 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/QZNWS2228837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1b0e0e5ff7e4e33b4610a0589c6defe0406c61423339cbd0832a04b4c5aa87. 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/QZHN62342179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbc04620a15c5f189e23eeafeb12c7732e598c93d3a18272a0a637b5a9d579c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMER2328507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29316a436bb032d417e5961e705ee02506d642224f760d80c1ab33f9d7f848e2. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZTBB2391723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc7ce421d1d3318e03034b1ee3c79347a7612dcddc1cc49652a1629973fff71. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:18:22Z), 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/QZNWT2545137.