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 0xce3b262f8a104d3ced571a105d586fc0a3592c5aee7ea57d3872cab7cb13a7ef. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/baaca907-e184-4038-acde-49ff2213d2a0.json and https://artists.proofprofile.net/proofs/artist/baaca907-e184-4038-acde-49ff2213d2a0.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 0x2fc0ed7bcc226551870bd0e388ae82c8db1baec5f640ad1bffefd8cb1e354ec2. 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/USF570811699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5aecb6b00180dd0fff3bc715e89d3662d0b318721e8843ff8eb359bddb6ac7. 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/USF570811701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486de9cd00cf977164e0a1859569e617a610d1de3ea9e567f4c3af8c9c3dac00. 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/USF570811705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f387fc3eb3f4d592594dd9d22d6df0ffe2c886e37bffa97e6b08a4b044ac479. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USF570811706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82052d437a963992c32f9cede6b185f520260d7ce4492c4a627ff7ca5064ccf0. 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/USF570811709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdfa69a55ac8d7f4c986c4cab8caa6e579212b173f7ad1212ed5970c6d286f0. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USF570811710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bb07a04a824d28c4c8e8ebcbd8162dfde74664436565b8eb614ad21d2ce8e5. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/USF570811717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296b1e6a3c2188fec71f95651efce706ee3272548d3d0de9f380eabbc1e0821b. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:48:03Z), 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/USF570811683.