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 0x63f39262468464b6fd60fe30d54a2af28c18df9dfa562922d452d0a2996062d7. 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/ee68e1af-9b88-4008-b436-14c0dc453489.json and https://artists.proofprofile.net/proofs/artist/ee68e1af-9b88-4008-b436-14c0dc453489.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 0x53867c9771fd9b20bb3a7ee3b24bca2073b6528f4dedd46cbc3ee8be2a177f06. 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/QZHZ42005013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27a402f3af990c89e5e96d6792287738d492c86c0509733281fdfd228818f6b. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/USDY42222562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd16739183c34c0839e19b779a04d0670b6e431129da153d3ae9e870ba2601aa. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USDY42222563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c21d782d000b9a623270a43a6251f20cc0c704da077bb1b15ad0569d5857191. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:41:59Z), 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/USDY42222564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b59583d14d8a09eff7048a7c56b36614799ba2f757a57049f75020905d45d0. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USDY42222565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e88d5ae472ab5a3702059958bf5c8f42d3a3e887fda53b40ad4a458d35842e6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USDY42222566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4898f88bde61f3b45797492cca3e7421537ce2ad06bd513d6e8575788e2d65a5. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USDY42222567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2284371df853e3d4ac4f49341a7709fab10ef8a17027a5e7793d4928506eed61. 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/USDY42222568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126d65459ffc6c36692fed07792f546ae3017f90ee360afb49e6379b00264add. 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/USDY42222569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956b62365a666e00d292df6cb621d628c490010632f4f71f728d16f478ecac66. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USDY42222570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ba759f7075b9322dd0f271fa19a18d2af90e4cdc811be5067e4ed7514db45a. 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/USDY42222571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2fc0c1e853de1010008313bf0831d5fdc4e148f0926ae9d882631dd1468a77. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USDY42222572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50831dc49086426814b18638a4c6005d933ff5b21a183bfa54242aa8e7eef481. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USDY42222573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65d12f2cef12805c57511ea2ed5f01f0d186bb3aa5b3fc7ff5e3f298bbd3f8c. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USDY42222574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8443657b65eaba7cc727e2fc1448ee389156d65a6bf02d34635268ea1cc08675. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM82309562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bdfcca6d05c290626178bf34bd40c8ad5e7cc9cc1b478ab4dcb27d9efe3c87. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USHM82309563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608960c3acf99735915dd578f68624813d774cdb47b87be4ebae1bea717c3703. 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/USHM82309567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ec102b2aea9aa02fab915c318458d67fd14b430b1fbddbebda848876a12193. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/USCGJ2429352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58c8a0891672889bd64a060dbe12af74b038ad083d7491b9c1f148efa84fc93. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USY242405716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb34944f3e160277d825cde219935799e369f4ded51e68e512fd719f61546b5b. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QT3TB2413621.