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 0x59400dba7bc103866ada07b644c00e9663259400811f4e74b17d90eccb904b2e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/513ac8e8-3281-4100-9810-d23fe1f696f2.json and https://artists.proofprofile.net/proofs/artist/513ac8e8-3281-4100-9810-d23fe1f696f2.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 0xf753b37b78308029fe6a3404bbffded0eb6466682f40211d6f115142f75d78f3. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZHNC1959117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6097bc90d54df179406234a51586c36c96d87fb87757505e6f0d7604a9ed17. 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/QZWFM2517071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73cb5011c6f8b42be3b5795598f9e0f9478685244408150b95675d1af707b84. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZWFM2517072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8660148eb8acb395305903f1935d5f5e9bfc2a69851272c2e2775eada40b49b9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFM2517073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd2e48d4ad6a86ca05cd397f0083a567382b3ca4b0ec3d2354d07a8bc008c35. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:44:36Z), 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/QZWFM2517074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9480b6d69e516656c8109fa33daca629cdab6eb9dbe84c82dd4e8c7cde3c5d5d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZWFM2517075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd6e6566a9e2daf727dd4c4cd412ecfa853d7937ec23f68b71830b5b6b4e6a6. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZWFM2517076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc240e22f6b32efc4f6a82eeb9774990b52eaa067458e1622b90593b44007b8fc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFM2517077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b1285bcbb8c411747a8a5b244d32a5feccabef6a78e50e4e3a18fb7b70ff45. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFM2517078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94a582c06cfc3f4aca38b8e2443447a57cc28cf142453d8f0df5a37f5537df1. 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/QZWFM2517079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43f0ee9568d567dacf8bded017690e5408ae7d7563e068e140e8b1fc2a44183. 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/QZWFM2517080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2a0c4a0108f5e21103b546d8adbb2839be0745cb0183a56a8a25b0b88079eb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFM2517081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e7dd401c9c3cb410cf27cec3459ec59d57753f05b4dac2aba3332f63cdeb75. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFM2517082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3080c30f0e3892ed3e001105f88eea10ddf58312970fef26cd6a867e5f73d6a6. 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/QZWFM2517084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c69fd3e9baa08c3b9b24c6c451c28d978ee82fa2c6dbd9687fa4646c216a44. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFM2517086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fab7f6267f1dbf4493c2e0ae121a121613cd8720ec483b0d8fb0b83ae9c72f. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZWFM2517087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a88ca9fdceff2f279dc1ac93fbee7d1abeeec76a44f3be1b9f1e5fd5504c61f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZWFP2510517.