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 0x680d5e7a123e91003cc2d22d38e3639b42b7893fe8f06cd5d823a51605efbb3c. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62ad7931-2925-4c86-8756-fb76ec2bcf4e.json and https://artists.proofprofile.net/proofs/artist/62ad7931-2925-4c86-8756-fb76ec2bcf4e.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 0xb0fdc60aa8a25cecaec510d1ca134d3f0b7f5a7a4adb314841f9ae26326196c3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTAX2489909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dec25b1b661055c5f3e474f18ed132920630e12c43d50c7458142be37709a57. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZTAX2487616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6081a329ef37baecda3c477623c535c54b83f466d7fe589352adc28b64b1423a. 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/QZTAY2437269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb92faaeb0aa04da4c2ae8ec87e7dafa39654199297ec6eadb1da222fdc225ae. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTB82434976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81768eb1fd0930d5c33c069782d56f9ab2b4cb0d27fe99e521ec5fc5ef205cc. 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/QT3F42464811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8935bc44d70cc978ff68bcbf1efa9492908a5f9f0afc9e218458cc98764be5. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QT3F42464814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b2e40368f2c8e469b9aa9cbb3b1484402807efbd60b8185585a2b9882b24f4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:45:18Z), 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/QZK6Q2526914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835edc83f6a18c13f411dab1e9217346253605d2dd6900f920bcb29b3c5cd7a3. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNWZ2505632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7b1f4388e2c961f43ef97bee93b0ac278a40c8a36fea32bbe039aff58cd0b1. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZWFE2595296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa919ae2d8124dc8503eaee83e4f3c39f099290149217201adf252416701e99a9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT3F52587899.