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 0x6b3591995b005826ec09be55bcc676c170c22c9bada3e28575e461b511ab97ea. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2ab582c-7f9b-48b0-912b-86ca26a0ed43.json and https://artists.proofprofile.net/proofs/artist/c2ab582c-7f9b-48b0-912b-86ca26a0ed43.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 0xc62304325861e59647ec45f3b0ba8804d353bc211ec418b556d78876ad968f0d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRR642400716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86702670495a31774ae7dc750c24dd4b94b9f70c5d8e7adde82172c93116f37. 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/FRR642302206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee07e46d87382775389ff5d52d0d81796ea8ff4e1bd389dbf543fb85df4c00c. 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/FRR642302273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c743581f6db9af24a3362555826f6e7e3797ee0b897c142d64e173586af01d1. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/FRR642300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d563ee5a762ce531cc29cde2bd6017ffb02aa6fd24899ea945885dcef97ea35. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRR642301046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968fa48126561a507cb62ff6b7b0c31c61c81709bbb1689bbee283bc8c122df0. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/FRR642201367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773d9bf91dc8aa437f77137293c7176ea9a538858040528bf131e1b13f984d08. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRR642301048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99b09c375410977a40ff918670b6a31a40327aed374ce929d36610ec4149493. 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/FRR642301049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c743581f6db9af24a3362555826f6e7e3797ee0b897c142d64e173586af01d1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRR642300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968fa48126561a507cb62ff6b7b0c31c61c81709bbb1689bbee283bc8c122df0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRR642201367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffda2ab39870fba4a0c7c574524df794c2dbff52a789643ff2a433a0528a58a8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR8Y72100138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a05c0bb688b50738709be0a7ed87e0c5b367732cbe333145f746df7a44de18. 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/FR9W12025190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2eaefbe1fc5f433340fb320e084c756a0c1d9e2c42a075766f0f632bb0b77c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR8Y72100175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13cc849be9bd4124e82149f00f878629fcfa0f0b2f773219b39f7ff5edbb102. 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/FR8Y72100176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bf97c6ede9e3dee976ab8bbfad52e4102a350dd552ba9943a768a6472e1db5. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-21T18:43:21Z), 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/FR8Y72100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfd5ca48b6463c58236f467a75680ab3a6664af111f7adc4e372dc14e5e06a6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR8Y72100178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffda2ab39870fba4a0c7c574524df794c2dbff52a789643ff2a433a0528a58a8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR8Y72100138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bf97c6ede9e3dee976ab8bbfad52e4102a350dd552ba9943a768a6472e1db5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR8Y72100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a05c0bb688b50738709be0a7ed87e0c5b367732cbe333145f746df7a44de18. 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/FR9W12025190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2152e08687c90979f2e531138e9637c68ec5b9d1780a0f98db418f2c8ceb06c6. 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/FR2R02400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f822b821ffc4eb7b215677a2e5f0e23b89d01b0268ef52b3cf78ceaf200c7d4. 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/FR2R02400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524cc6aff22ea074c4854fa7941a31c56dfe4513e96e16aa454c4317f4a5b428. 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/FR2R02400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcd9e7b3f33803d588ce7b611017f388cd81a463cf8a74d5a411b6cf8406a36. 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/FR2R02400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6ce69e1a2408d9e669bc58435b8c3336561868f241a3de419ffa844399de0c. 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/FR2R02400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf520408d6ae171131fb2bebb3d1f33c7883cd67ad48ac4e68922d6fff9861fcd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR2R02300220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc990bf4aac109b05ae8e7f0fac59ed43e2204d124a1c9e48ed9028ff6fcd60. 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/FR2R02400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2f5e53a162705f353ad2c3aab864556db907180889f3011d5ed3dcc7ba4448. 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/QZK6F2349666.