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 0xd506febdebbbdcee5c7c5416553ba87a77489487cef55764b4153009ec2ee6fa. 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/baebdc1f-db26-48ee-a86d-773267f91112.json and https://artists.proofprofile.net/proofs/artist/baebdc1f-db26-48ee-a86d-773267f91112.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 0xb21496efb8b2bb66b7dcb700063c490c4b4f5b1044fe87edebc1a1331878087b. 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/TCAGW2306245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34a5ff384764cfec5e225e07c725717cee9c2a1a16bdd1cc912a83bc78deea2. 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/TCAHC2397688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27592f17e33dbb427ca3067591b47da0077549cb7722309d4853f85aa642f04. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:22:06Z), 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/TCAHK2303102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24343d8fba8df0b5cb9ca60de9cd96aa89b442a2dfa4ec980cf40420663458e. 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/ES64E2335274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc6a121fdc94ce3461877a425dcff4fc58333bd11a29d98f4651f8af2017e3f. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/ES64E2464202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc48812170757517d3b8075d91137f687d97c7214c38f20cd649c300e89390e0. 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/ES64E2468773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727486c7e37e9928ca4f5acc383e2bc6931c1271fad08594d85bf253809f3f7b. 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/ES64E2479813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03243e5991f8eec72b964af53c395511ecbaaec75c8b5917a4389bbf5053bf0c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ES64E2484592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c790d56f1ab2aff3ed5ed19830dcdada7b04f4765d757fe712ed41d8efca3f. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:58:32Z), 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/ES64E2488534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa43caa0043752cd59a967d2f167bd440f4abcf63bf8737f8a646eb5b78860d. 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/QMFME2457559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c08b6aa515cd0dc5ed5c8aa8e0519478333b291ef713dbbfe29c72428dc0a9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6MZ2589419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b275c30f798578fdd2b42d2d175da32f2bfbb5330cb9205990e7ada0def049. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES64E2450070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e3436085bbff4b4b7a77d7ccd039086c86a5e6947251efcb0a8f4d0a3a965f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA72413064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d027573c93001d7ce4acb9a4fabad29d9dc06a70461d830d42524cdcfa58bce. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6P42457873.