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 0x02947c195d265a71dee0f0adf462412cfc648486a2ecbd48b79734413864caa2. 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/9e8b881e-8272-4ade-bfd6-9bf5166e5811.json and https://artists.proofprofile.net/proofs/artist/9e8b881e-8272-4ade-bfd6-9bf5166e5811.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 0x0d87d92ee24ba7b7b14fedf78f4c2909e0f3a1a563c3fea8f940d30bc176f9bc. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/CAM460432576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e90e14d24d4a52c89768dda132b6ac3aabce9bb424766f3f28cc01bc56039fe. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/CAM460409462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a568834113ea20651fdb3807e2a758f866b4f05d9612793ea566947df7c81c6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CAM460402760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4413d64da1fa8b68b4f4b7a5869df2b3c1ca1fac2789d60f63437b306712a217. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CAM460406654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e264772036a33c2470f7467b35e133bb46412eeae4b5954c50b75f56361901. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CAM460402282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f02de014efd190313a6bf51707c609247a2c356a9cde2ff079508a1fbfe60d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CAM460406594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84afb4094169a1d3708d1305506feff37ecdf5279b5703d82dda2603faea19b6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CAM460406595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262e6daaf38c5ff8d9ed84c24bdd76f4246933be04a0260d12f5496d28983beb. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/CAM460402811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f18b29315d213836e5211c7b1032bbce452bead90c0a6f0b500fddcc0ee815. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CAM460418952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de43976d592ee494d96e18f2dd92a00a6e1dbaf00edb96322983a2785847d4d. 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/CAM460418951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692f80e743a90c23488ec81bf0ea85ff9f2a24abff27fd4e246ddb232cfa443e. 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/CAM460406584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc032950ec6a76e9db3fd021ed954fcad426b7a94568daaaad8a77ddd8f8fc36. 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/CAM460406718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba7f123abebf858e77fcb9592f77ee4cb5717f0287a99b1d2bb696b72c1ffd3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CAM460419059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806e77e1d199763fed15b7227fb9dc1554006662710e65d520eb9320d27aefa8. 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/CAM460406705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4dcb7f02b7c2da2a917314ed15e2f3863671f0c5a41e647eca04604abaeb31. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAM460403350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4e2b8f93d4d03a4f6a6c37e64f9f9ca1e2c15575079b488c067d0d01b05f52. 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/CAM460403512.