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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3671e93c97c49bbbd58817655c242f557bfbef1ca96edf38a5d3f4ed5c6a0c14. 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/fedb485b-8875-4ce1-ad54-5299b182459e.json and https://artists.proofprofile.net/proofs/artist/fedb485b-8875-4ce1-ad54-5299b182459e.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6568e51e16886b42eea13cdefe1f05ab55962e01c6b50bb8fb86900d12ee9719. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/DEYU12308017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec5b5f23ddf2945c4881d150513f1a3ccda12bc1acc4479ad0432725268ab04. 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/DEYU12308019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea07cd807476dc3198e1b40043c46208fd79b8518ba3e6f69bf2d88c9ef98fb. 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/DEYU12308021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86c2a4731b95c8a6e3c7e1fb92446a38312a78da9a09dbd8fd10d0106a815d3. 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/DEYU12308022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6ccfe17dad84fe92e6ba00d344d2c68972f695fafe5df2fac1d5db5a6d1911. 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/DEYU12308023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170889108fa0bc078d92a5d61b02b6021511ba307df1835a088e34f546c6cba0. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEYU12308024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe16a4a045b1df5cd5c3809083b67eabb219605f53ba0593f1458a128d45cae7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEYU12308060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5bd514fb1c4bba09bc1aba4f7602011d8678f2583f240a1d6db226d9e1559f. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEYU12308061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35d5624431a86d706ea957b2f45e11a442018bb08f34a47adbeb19a0c55cb1a. 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/DEYU12308097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79580397b33140a53f40f1c4b5ebde9eaceb55e5459dcb3eb0e34210d041ace1. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DEYU12308098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a133ba5cd819d9df222f490c382a8173e042bb75e47e0520c83e2cec6ab144. 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/DEYU12308099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4588302168217a90559c6eb0e0e4553852de45d55f0ee3a168ff227959cee88. 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/DEYU12308101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86488b23c9126d15e2d698a5fa08161fafd96e51d34526c739f9a416069102ff. 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/DEYU12308102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9154f65cbc72fc6a2403dd8b17033345a94d8c7166f7a47063c2030812c00455. 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/DEYU12308103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa445075c0cfe4c79a664bdacdaba047075639c825bc4dce4539afa8818e95049. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEYU12308104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75885b3eba9dad01e77161e1803470f8e2efb848bc1979f6116178c422ba1e1c. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEYU12308137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaafa5f42dc18423e94e34400c933530b345e034dae7f6ca143781a9ee1d5efb. 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/DEYU12308138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7136d169a5844924fd52a81b27e993e27ff1787aa42805cc7d54f138de0bf90. 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/DEYU12308140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b04750ef4747d6e4ce9ed8da8d678071eb6aa4a33395a08b6d803f88722a029. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEYU12308143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6acf7865058b11e62720a27a139c1a06321ad24e3a489be6c2a088b7cb622a24. 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/DEYU12308144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d00f45391292207f79067cb98348899485cf18cc9b8aefd2defaf41594146c. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEYU12308177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe139345190da2a6491c65b0a63aa0ab08fd256537d8b1aa9fdb85dd356de9e8e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEYU12308178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622d14b0c32a588aa3b69cf7c1f74620174f0302798290fa60269dfb2fac4882. 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/DEYU12308180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afed5e1a49eee95989d98f41e799a6b8c17c6a43521d8b9671522fb75b80587. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEYU12308181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26c6533ceb4419b881d64fe9eaf543476e2a27d67cca183e19a521366743344. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DEYU12308182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc357698a006b8260976de7d5639ff1a78b1d9c6ba2f043cfb669eeffc61ee8b8. 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/DEYU12308183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a5d0d77a9a04ceede126f27a1f2691672a30554d72b443acca6b4b2bd172f6. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/DEYU12308217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e002cb7d3a77e0845d5857b3548858c6e56d323f8e10faa6a0e47fa60606e1. 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/DEYU12308218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2d8e51bbf5ece52b5f2357d4f31de5771c339a2779f985ab3dc41b904af378. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEYU12308219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259eda6ae1c39fea352f2d595a45d2767bab4e83ed765e4a91a48741be522927. 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/DEYU12308221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e633cf8ff71b73b09d415c838607499b6a94594d22774889474fad1102cab7. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DEYU12308222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f707761ed211b5a20ccf5585c08e195b1c9526225b32aae8c6406f4b245728. 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/DEYU12308223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0858a2e80fab138b33f5439673a5602b1189c053dc6f86b4b0ee9fc35e11a6. 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/DEYU12308224.