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 0x38c64973a70629ec7cf73df621ac984b6d52c55f4a5635c473a8306f5ad74e09. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26bf51ac-61a2-402b-bde8-0cd7a49a9d77.json and https://artists.proofprofile.net/proofs/artist/26bf51ac-61a2-402b-bde8-0cd7a49a9d77.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 0x68163101124eb43102f5a718ee21644aa8fb259932f9d2b4aa73516796b861b5. 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/ARA190500516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69edba566c1e25ff68e12eb1f6523774724d8617c91799b234c7daa4fc20d85. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ARA190500517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76801d68a8fff1ecae1dc2427629b801e1a910bca8e4c66e5cb3f163e290f071. 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/ARA190500521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1806b3ac6b62308a28c27d2d13fa83c1530ca739acee458cc0771b95300e4343. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ARA190500527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdeaa9a3c741827cfb416bbc1c3105d66e8f36a4d8d4f096b6c8bd0f4643b34f. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ARA190500766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf03029670a39707f9832a3cb527db52888a75a5280a1310c23988aee0d649f. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:07:51Z), 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/ARA190500767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff71faa4b4dd4af6b7071be1f3f1efbe13443d8d2d1869c79df50d90f3ae7e0. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ARA190500768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afe0d7b79f9a8b13e3ab33af580b31ee09a0374548d66f89a934a4adb1e594e. 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/ARA190500772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184fd64456ca6bbfc43d041f0cdd222b0c166c514ae641d927e1776f338ac846. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:57:41Z), 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/ARA190500775.