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 0x9be7cb91cf8935215bfaea4c5baa4e22284415852f3a6302ce93bd153730a19a. 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/b2a53a86-37fb-40fa-9f85-05e0b2472c4b.json and https://artists.proofprofile.net/proofs/artist/b2a53a86-37fb-40fa-9f85-05e0b2472c4b.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 0x57fcfa784ae2f530c67848bd5c5ccdefd9246086f09e438c0da83f395098713b. 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/QZFYY2047894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42603f114c1c7c576e8dac9693181c19c13b8c724b1cfb14c664d4ca0572c3e. 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/QZHN42037795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108f428681fe52a3f65f3596cf9493bf7a73e92c26548265830fab7e4cf3c640. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:01:59Z), 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/QZHNB2075667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6368449375c231cd66085747456b82692f0dc180910edf1f42da5f191b70a9d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:08Z), 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/QZK6J2078534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4de803f56638177708709e7f07ee17a49071099a6cc09587bc4cac4ce254491. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:04:59Z), 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/QZNWR2012440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8f4b5d758ccbab067df733d7eeb22abbf6b0d61047702bbc934c7b866b12de. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZDA42114709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512176422e4a72cd8cce0b9ee7e7a76c2226d0e03187e0f27b6b71db2a857426. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZES92127940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62771f09f0f99015f8e59b764f6f7ab63890f49cb8058ce0e3996608100304cf. 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/SE6HN2282777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59597677c3efbdefd610d3d07d875cf52ccb7668a37ccb68554f8c26d18a531b. 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/QZTBC2351110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28592f8fe4d91f5ba7ba010d1aa5657cc2e8a1b6dec7b31306f5acb4226db7b4. 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/QMDA72400474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d1ad74d5ede4988e27188a2cbd454a68ea7b8c7bd60c031140ccbc01bd9a2c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6N22483537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59597677c3efbdefd610d3d07d875cf52ccb7668a37ccb68554f8c26d18a531b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTBC2351110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28592f8fe4d91f5ba7ba010d1aa5657cc2e8a1b6dec7b31306f5acb4226db7b4. 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/QMDA72400474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d1ad74d5ede4988e27188a2cbd454a68ea7b8c7bd60c031140ccbc01bd9a2c. 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/QM6N22483537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59597677c3efbdefd610d3d07d875cf52ccb7668a37ccb68554f8c26d18a531b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTBC2351110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99355c9036c67fa17dbf46235be5304e292ae57f51de78129677188c50ed3442. 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/QZMHL2208204.