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 0xb081c15bd73b07f6a70a9002ae0a4f99ce009e8a529df3e77bd5677ebe233ccf. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b1e7d92-219b-4200-bb30-9d65ea5d8e93.json and https://artists.proofprofile.net/proofs/artist/6b1e7d92-219b-4200-bb30-9d65ea5d8e93.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 0xc42b1732cf59c59abf05a01c201945f963963e37f2cd3ee18b635362fa8c448e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:19:16Z), 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/GX3Q92525096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968b7f13677acc4bec5734a10f1b4cb4a8280b4da581c22bd1b4ae4c7a793558. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GX3Q92525097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3c3cf09d7243ab0518be07df18011d22320fa804b7a9e95ac643fa243592c1. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GX3Q92525098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55c232ef9037128842bdd6de00fa09e77b6c34c9168ce47aa2637ac8b87b800. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GX3Q92525099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710e234a8f57a56dfa103dcdef0753e2b3608441611da6628c0ce07dd21b51db. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:03:25Z), 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/GX3Q92525100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5198292ddf337c10b895b986e542f12e38bb6a92e64556c11340999aafce35d8. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GX3Q92525101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7476395243dd38a8fd019051eca67e4ee1552fe9eed619702ef64e3954580c22. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:58:11Z), 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/GX3Q92525102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a8a9e3f5d45bff348ae7d402cf6ccc26049889d7e8e3d94b1acc2c9c46e7cd. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GX3Q92525103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa534772c7ab2a3239b7f319f7408f36d39f71e6248e88ac0cf08faacee6da5d2. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:19:24Z), 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/GX3Q92525104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284b28f385c54f9799e57c651bdb83d22cb534d434fa04c8ab5263c48fe29bb3. 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/GX3Q92525105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf807a035890e242518ef0d3a4ad7a884c5f9735aedbe20ba3c8ba817e4775afe. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GX3Q92525107.