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 0x5f79595daba8e47d49931c9044d4f56cc2d4cba3e10e315376f39ab9348f1590. 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/a08079fd-7fbb-49fe-af61-af55ce0cded9.json and https://artists.proofprofile.net/proofs/artist/a08079fd-7fbb-49fe-af61-af55ce0cded9.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 0x1dea9ccfecc1d2f794e5bbd77fb04a5d444aa8de4ccf45e11f4924c4615b02e7. 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/QZN882123532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252a299bcc2ca7fe956f92bb8e445e0fc73bfe554806bb6205a20db831cec35c. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZMZ92397034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263bf23da617c0a134807ca34c39989dea6e823b53cf0a537c90285a92f512fc. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZGLM2402689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4630a5a0a29b7191c7f3b4676743b93d049e14e1eb5a2798a622c8e5cb2b7dc4. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:23:38Z), 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/QZMZ92402697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0066acbf7603200d20d52a59aebee397b8d1363d662efc369164818f38c0f808. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZMZ92402698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1846e6d21b566923817f14517bbd549a2877c7b07e9a11d2f5cf013025958002. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:42:23Z), 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/QZW9L2440678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9fa168f1df7b10502178bc29c9462e6ca12b57c89b8174b13c5a788d2fa281. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:09:17Z), 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/QZGLM2537529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa831dd63b96d119920a29ce3f69aba83cc82f88cd9bdbc275775fca93f27f83a. 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/QZTPX2549960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0ba6d79b4792032c4272f31760ffc200b61056de1bf9e88301ff86db08a40d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTVM2563086.