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 0xd99eb9ad8f3362374e50b1e4cb9c4cb3a255cbd4705d3e466bc6915dbf7f1136. 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/409badec-0e4e-4fdd-b5dc-30092c036ec7.json and https://artists.proofprofile.net/proofs/artist/409badec-0e4e-4fdd-b5dc-30092c036ec7.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 0xd59da71bd8afbc36adb9305b099cdcd3da69178a0bf88b47bfc7f3f5b1a72e68. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZKDK2038469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cd59b7aee7e954dea0a5d325f7c589ace7fbfad528c8622f85d7630a692c76. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZNWU2212960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b406e78ea406a9c266741861561dc8197f853f565061738e03cc43e0fd88b64. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMEP2317935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a0758a86fc0b2c3cd6ee60bcb65b12d4d1fa48c498e028da744fc095b48842. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CA5KR2427663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78de52257861b59870f25f7361d880a8e5d44c546f1c08dacc2e636a1d0026b3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFE2473213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394aeec2b3e66b436838645a8fcef6544e78ea176f1cc9e9394bde273febc0d2. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZZ7V2447599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15080ff375bfa4deb547b2465a6d15e666f0bb2a1a6c21016375162d97dd9804. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:06:40Z), 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/QZFZ62582634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf43ae67bcde92d2a239bf4ea0b1549bec8bce50034d31c57ed04046a3096182. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ62582635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecef02838c76248e197970c08a13f07fc9f09e9c2a177358e2a13d9e8c9b33d4. 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/QZFZ62582638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b57ddacfca6140c2acbb73fd4a4ac96d0f57a03a645b91b455b25bfcafc0d7. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6Q2567646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368e9908b39f8a8c8826bc333c3af339bc0ec85b0debc69de8cb84cbd2ff5fea. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZK6F2544081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda53895709180a4f5998fa04b98525ad559c3bb30edb1df81a1a78ee111a36e. 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/QZK6F2544082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ce5e7f56eb8195e8f9d4f7c3f336bb7d31ba23fa9bbc5e173fae63c90d3841. 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/QZK6F2544084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6625802210ff4ac569784478574801224358a4983e4cc5ee4e42cf6c2a52bb0. 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/QZK6F2544085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d0f524f98b5c0ffa8fda737aa4f146f12aebb6af90e36809ceefa708816c1a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTBF2537969.