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 0x6a6cc62d910a0cc0881b39b9bb3d4e7c33d3aa14ae50047e8203065461108953. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c32834e-e4eb-42a6-a2aa-77691c329953.json and https://artists.proofprofile.net/proofs/artist/1c32834e-e4eb-42a6-a2aa-77691c329953.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 0x3a00490490a4a8c268f35cc7510d241ae0684bc88b2f1c9a124a5a4a04320184. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/ZAC012201197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbde035d66420ccbd06d753ceb58c4d535ed8d53f08d784d79f7a77891270573. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ZB2D42400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d43c3057c22a056301091f14cfe961cb7affd4fef9e3a71911199c2a8ec706. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/ZAC012401588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7736f4f837ca8fcfb378d21f467cd7ba52d09d6d9381726cfea97a11aa49342. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/ZAC012401589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0e4e48c5f4711336d2b94e911366ab4596e241801c862996c200e2336b57cc. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:32:57Z), 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/ZAC012401590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c72a05b74f9cecf7d210b073a8d72cdae719eb8a9677a6b984eb6d11c65aa8. 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/ZAC012500174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5a8a10549ed486f5a8d26beb8237dc25d4beedd6fa43b6920507c9df39318e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZAC012400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a0a89230fd18bc148991326b1813f39fb409821d0247a26339de9c02f3bbdd. 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/ZB9WN2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2c8d837b6a45f37a14b463ef7820add21478469b75c57fa48dde0bfe0133fb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZAC012300985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5857513a723d0667841a2b2cd46b54d14442269f732151d0c3b731ed84f9d08. 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/ZAC012300986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8208a4dc432d6c19ea89de9843adc6e5fd0578940867a06dee78a909f9e012. 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/ZAC012300988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba12c38f3143b762f01888cbfdee82dc65b72dcc6ee04377edc677d6fa44917. 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/ZAC012300990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffe0bdea549f3112cdb2b56a7bf19b0e1bdb4d2b9fa085a7020d790d215fa52. 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/ZAC012401124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875a496fd80b575dd49dc54b6a983ffcf5c8678b2b97c01dd1de8cce963c94f1. 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/ZA56E2419865.