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 0xaf0f12d3cd05bfbd6c73da95ae8d37907f27b2c0dfc26f28b55f494c17c72949. Chain 2 (Bitcoin): anchored in block 953722 (2026-06-15T01:21:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b67b9a9-5ff5-471f-86dc-e1d32904cb8c.json and https://artists.proofprofile.net/proofs/artist/8b67b9a9-5ff5-471f-86dc-e1d32904cb8c.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 0xf85420b3308812f159f8227d122528ab537c12afae61b28972495f1a4a1cf345. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR96X2290061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ef3d45bd0fc99f1ba458d4d016131168439346f85445dd6c6bf784abe01de5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR96X2290063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf123247226bece86fcd8e792e141492f0ade85ff29a3cd4b2c92c337e5a69499. 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/FR96X2290064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654da84849d68921ab1255167d8febc2458e8e122de3af82f79e37bc59da8273. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR96X2290068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddaffd628dbc7814de3f4a1dc5098c294da987da9fafe5eb36c81f36ede367f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR96X2290071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c47f12d39c26e8f9780419ae11d7124bef1012e23e81822862fc49929a8bcfb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR96X2290072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2ad4ffaf38bfb46a42928a2ab67f629920bd1f37f33e22795ff2745c52f760. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FR96X2290069.
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 0xafb8dbbbb6a9490d953fb9c30c7cb790154cec97dd1685746e6959eefd0293ac. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PL90Y2391648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eaaedcf1c836665d645761cc8e3548b95891fecf21e0be834f7a5d21c6891de. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/PL90Y2391644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8eedd3adea68296c9415bb955970d3b5e83801cd71b924585c5154a369765b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/PL90Y2391649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dec18f1759f805f76deb2603e8e8c06c8396ffef67796f8351e0efe875ab7af. 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/PLC062231129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb160cf125a06d66f65eec3ad8968b5e4503a4fc9b9f780488169a64265b61e00. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062229721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a92e78d7931a6d4b9481b4447981047b5702db98dafb3816d6b0371f252695. 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/PLC062227875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7282b656e9f259ceb7b50fce084ecb9c51aa104a399cfbab1a9c5bf86e225d79. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLC062231131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf063d4aa7a1572024fcb651315c62d9c81f7fb9f766d6d7065784ac1408a96cb. 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/PLC062231133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5844423e8414d1ac244ba002d691d85ffd2f3ee1ed9feeed550d7ce20f32e7f8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLC062231134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9ff36efd10b247ac9b141611d7cff5083c321d1ada103eaf0c019cf6c2a03b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLC062231138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3107fb5ca0482efff6e832f159491a331c05de38cd6a7353ca37cd5884edf7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLC062231139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e929bf64df5c9781429edf48f395c2f359d872e2a4510bdfde1fe0425844fff. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/PLC062230825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265e5e618f6429ca4bb0c13a50b2b3f712cc6afbebb7cd681af91a2c745254ce. 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/PL2DY2301317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e9aae48b9f833b03277e068a2843bd22bd7ab31ad79dae19585d18aaa3e0b9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR2X42062036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef42f588946d5c7a9ac499b7788d98522faef25ae09694bf04429ac250dbb6e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PL66V2209721.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce790bde2635f1546a2248867cf11dc13eb278c2d471eae322e716f97fa93a6b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PL66V2209728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a1bfa2f3fc7f99be46443bb016212c720772d108210ba7082568a41f595c40. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PL66V2209730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2527ea3da03afb51637727813aa63fdcc41b320d9d530270b96c7e4319f93282. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PL66V2209731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44239555c38c2bf2ffd0d04cd6f804982aecd18c44f3f8cbfac854475566ade0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLX492000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d36fd36717dd43e52f262a15057df1257c4f67ae9d06147e33cbf3fd9f23c28. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLH492286962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1be818ff77cde7070af40a6dce4107367b2e8d7b2f9fce33f8020a34eddab0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX762154705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453e0f29054f638cb9e88b3df1c5f5aa41a23159417c4e4c4e5282cd1ecbcb49. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX762154707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c761287e133cfb3fb9641e7e95a96701bd6b1100553b1dc708d8879535443e4. 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/FRX762154714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af907d2569a4933fecee92fe7d712eb8cfd336d7ee9cec70934f7560d68c32e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX762154716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb296132e0c4f705a422d865ae3348c60e63261271e6163f7c0d06644f60d8d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLZ281900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1446ad146ffc7c00ae67bf196764b922bbfb5f39bfe5a9f35a69b99f4281a916. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLZ281900027.