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 0x3e22720272c5e415be9f278b33c0472d41d70eeca0cc1eccd645e61d31838b87. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/629690fe-c3aa-4a9e-8b82-0426a655ca3d.json and https://artists.proofprofile.net/proofs/artist/629690fe-c3aa-4a9e-8b82-0426a655ca3d.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 0x4d8ff0c403f926b5c4d079f57ba46fa7ad92edb649455c6175e5950c2ac08608. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FRX452115995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e29a6d61dad08c73b8b7ec7faa3090e815afe121f27d25d1782f42b93aa440. 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/FRX452115996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf2d5d4c54a372b1dcd86a89b7738b7df65dae8e6828ba06150f80c7f047937. 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/FRX452115997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6e74fdebd510310690a988f02ffbb6290a7266aa8038eed8d33cb106e30daa. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FRX452115998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdcde341bad699ad1541b93f8a3514d876a23c5c29c09b3a98900c84945bd44. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRX452115999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11faa82d3bf6114dd49992a9abfbb06081f840be3983e9202dd063b0020bf2c. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/FRX452116000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cbd16196bfe32e7169330d5f61885c14fd9f248835bd10ef074eab430f98d4. 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/FRX452116002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93165e11aea3f1fe35f71fc06bf368fabb009fc317082474a1cde1798115de9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX452116003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf252767f404e80d812963cb716b1de1d888a6cebf7ae9c9b8cabdd40b2c295ef. 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/FRX452116004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381b4905b49f26673957b0ddc83cce6a2374633820096e370244185cda876015. 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/FRX452116005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c13babc0bb800932c4f4b38259ad0dadbf2861b2a90b9cfb11f38ad53de736. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRX452116007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800a1217fad297e07e96f14aad872dc5091952d4f908d8ea472dcb5881d34078. 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/FRX452116008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bf0bbba857b58aaf133ea4603db743ee1daad13c66563f3614cc65025cf94e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRX452116009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc8d2e32381708daf722f618a6d7e550a9bf8e05d540677203a6b3b02b278a9. 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/FRX452116010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20054d508593326d052a6a16e0820c3631e75c7f5c988d8fe21622a30de5547d. 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/FRX452116019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1b7e29d1aedf0a7abfcd3fd4fa877ab6e3c9b28bddf59a0b144b169df49ebf. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FRX452111496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33a22e33e6ec85a6aa86af3944b9480d0be5a063c160b2faf60a126e93aba72. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FRX452111507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965b80cc50a4a03ce3bce53383198c6a4ce9958edb4afa7088cfebb7fafbd060. 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/FRX452111511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef5b64339fb65b28d8167e723c96e8e9cdbe8f230db0ddd6df3c02baa508f89. 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/FRX452112642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f17bd797d7fd846707529f86889ae8e3e9a4d3aeda55ac95f253a444f6f3fa. 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/FRX452112643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e4c9aa3324ddd2b531667170a21a235792a6398ff0c003720b8578924f7cd5. 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/FRX452112644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67efa83e5b504bea047fb3b3b951d90a395076a1c4a5fc00b32d772b4f1a290d. 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/FRX452112645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da3789ac07a2cf71626804d6528c0056e3335b67f122a861b68647f30b2ff42. 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/FRX452112646.