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 0xf5d620032c5f30fdac8c0b092bbf9c76f8ff232627bbeef1efb5539d000296ca. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35115508-81d7-45e7-97bf-9d392bff0ecc.json and https://artists.proofprofile.net/proofs/artist/35115508-81d7-45e7-97bf-9d392bff0ecc.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 0x60882f0a251a1925e6d45f65952d6e6e707599b27658c117c47d2c3f4d2f6dce. 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/QM4TW2173367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a60334d95c4124bc1ac9ab5cf99e7f889192552cac547a3d9e3f7bfa7fa377. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/QM4TW2173358.
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 0x326db859f320e574d53c85ac6053684e204a37d2603dd8d26dfa8dc31d93e752. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM4TW2173359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe75d6549008162aa01586ac2ad80af0cfc1a7264cd0986c11f4b2cd32a2f30e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM4TW2173360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf7ad10cc732de2344d0a382b82e7ce03a47fdc7e3ba8d9f64c2be6a5e97995. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QM4TW2173362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9975b8f4fd88d863ec5e664c0b4b70ba8e49badbf26ab3c93e9d84475e52fef1. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QM4TW2173364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d9ed77da7da27f2674aaa41280855b1fe70f298fc537e3e72db9283a76e8da. 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/FRYAS1006712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a14909f7c5aec9e0069c10c137a2548988114109f1b352db5f4fca49fac5f1. 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/FRYAS1006714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a33c5fd5313bc5788f6f740c4cfa4c44b306eb74b7de93518c2ec12b00f903. 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/FRYAS1006716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bd2dd024d6baecc1667ec83331c708cd997b3e48d4d63f38254e29d653281a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FRYAS1006717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacacd51632da44e4f0be43aad5c1357ab9df4c39c8c35b09d187e0ae3e8e51e2. 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/FRYAS1006718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05e22d8139e141e9f016595e630672c3a1efe8131c2cc66acd4737a9f19e18a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:11:22Z), 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/FRYAS1006713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3488a37c4de44ba73580f8455605e35c2bc306751c9428b55482fccb35984aa7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRYAS1006711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721209ca1ef993f221b5da87b2074a64b572935037ae2df3a676356fb82f4e06. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRYAS1006715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2141f962b99bb21840b08eb9fd533ed94134bcb933f921a55268e34579ff007d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:38:16Z), 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/FRYAS1006690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe862e23b92c99d1b394915b74018d27199bd18b8d0d21fcf6210f0fac4e61901. 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/FRYAS1006691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9026cd07366f54b74597563a205a7028bf4ebad6308db16184f9313c00a34e. 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/FRYAS1006692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab73fe438af7e88554b1160808d7944f70e24e1e730906942fa76c320ff836a. 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/FRYAS1006693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d601d7efa185eed15aa4bb873085f284e8f01cc100bd544a0d3430f193dc614. 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/FRYAS1006694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26726774d24b61bdd47fe4c4e077e8b9b269f8987c3fc0c1f8d5923e221116f7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRYAS1006689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e94c09e5f0bcc528e28127e7a3497fb6df6e1baf2f574a82b9bfef343c1eb0. 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/QMBZ92025953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4019753dac20d7e90459b25c34eab4c895ea569375cc03062664cb9be925f803. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QMBZ92025955.