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 0x7794cc8998cc2abc66c1bd636372c4d63a5732b1490def8a2dd7532d4ea1ffb7. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e1fd94d-169b-43b2-a21e-7d4416b8f6f9.json and https://artists.proofprofile.net/proofs/artist/4e1fd94d-169b-43b2-a21e-7d4416b8f6f9.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 0x131acc800c990871ea5a566e985d4ef2c966d0382e116a930a8528b76b5b4ec3. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:24:08Z), 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/QZHN42575777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f71167192a85bd98bd7ba33c395e62091c3a71c551b08d5a4b59210a30d014. 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/QZHN72505788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5628f3d57d21fbba39bfad0848f1213bd67649d98a5701aef829a85520432eb. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHNC2589897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7932d963786d3bc91bb46c55597b42cc5aff35b11dd1f6006730786091bf97. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZK6N2506508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbce4ba644ea211028a8c28ac70e937251e68955cae2b7c6b57c12c62de7d06b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6H2568621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cae2b406c4157bba5188ed10391a7732425f4c87f583755d40df3f83dda4f0. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZK6F2594852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddc14bc6a4d664af49dcf19f31e5940f267f10703c4ad8a5f8e48af06c47d74. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:50:00Z), 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/QZMEQ2507760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ade2d79a96274db1320cd101e9a4a6fe31681220b5a773b40b26df98482d45. 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/QZMER2501991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7497d15704c3106bf63e7c4147606c04ce9115cc057f993b6862efa896f67e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:27:37Z), 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/QZNWV2543468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929db8fc704ecf0b8bc8cf022973316b58681f33eaf1a4425e1672d3a39d2db9. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:02:50Z), 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/QZNWY2517635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6500b067b7d16dc8881a3844f8b5cde89f78328426db286eaac3be685156cdc7. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:13:31Z), 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/QZRP42585944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321955be2dc50a143fa64023c598cb82c419bfce69bf4496e46325e391dd92b5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTAT2543242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc966e773e1caac6352a23cdafac3aaf90f1334f3f65277fa317eb4964b5ae546. 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/QZTAX2504605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e928bbb54c90434d53348d4094b1ac136e31a571ffee896e0486ab0d15211a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:53:30Z), 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/QZTB42518085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17745739070dd668d625915f3105ef78c38c8a67ee0fe47102c101100a90e4c4. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:33:42Z), 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/QZTB62593909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d587e0db5581b3c5873bd7b56c76f70e9db9b42ed83f55e7a7abe7700805dad. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZWFJ2554051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fad052fa87d2c70cc4a6624286b9cad469d5155eb9e472430cc6dc3bae20b3a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFS2556488.