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 0xd2ac1f57732ea8a2181b2805243a49064210a8dfed885905a065a9d6f9423169. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9066bc56-0aff-48aa-8106-1fd1fbb0d5a9.json and https://artists.proofprofile.net/proofs/artist/9066bc56-0aff-48aa-8106-1fd1fbb0d5a9.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 0x579d5e25eebcfbe34ae7295573875d7eba32bd37cbfce250cd2d574b61b17921. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/ZAFTI2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe797a79daed6102ac584fee76746581cdc14f51873d664ff082c92dac84512eb. 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/ZAFTI2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7d6fd8dbbe5b73898b4971fe6ea5d829e8270e9e71b5605c78754fa7377a39. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:51:02Z), 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/QZHN92468552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111bcd779ec2917dd2d413130a1491a16b18667b3f7f04c070e4851744f2a2a4. 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/QZHN92468553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c6675067b5206fff7a73beb54287c74b52e7e5132166ca3769272ccfcaf65e. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:58:13Z), 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/QZZ772427172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c90a636264c63de099de9ba640ea9b9a522325b9662d67d7f7d7038ecede4f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZZ772427176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132541a0ad6b11a619ca6dd7955234d9867c346331930a8a069fcf5f614c1a80. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:39:11Z), 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/QZES82590563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc041aad1ed5a75a036802a591282f8a5b355a440d23b0af25acc0c9e30c424. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZES82590564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef72910fc4639ebd06926b417ee9c3044c9cff502254ca5b671bb4f01147f78. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZPLS2566797.
Thando (Rodney SA & DJ Fresh (SA) Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe946aab7737c30af74330f80cbb679d5c9ec0af5d6fae57130c913cf1c6c1ac3. 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/ZA8212300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf912c89704f59b08d59c0f2e32176f1a18e95f62b7982415ec4a3630882b0f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ZAC012400158.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch