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 0x8b0b17f41aded26b96202cd600bbe95ef5e41aebc8d111eef8b218e5be10e5d1. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f11ab83f-5c1b-4635-a441-f606efd4bb70.json and https://artists.proofprofile.net/proofs/artist/f11ab83f-5c1b-4635-a441-f606efd4bb70.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 0x1cc19f75a68057a4418707f9b71534b5fb32fec1414c5db92135b6ae60b713ac. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/THG012400711.
ชิ้นส่วนสุดท้าย (Jigsaw)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19302f13db79218ce0adfb241beb9ecca6eaf47e88610b81ce4128a0f4b6db68. 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/THG012400714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3089a1742bf7b8944fe1502309d789843f3dd616648650d58fc0a56489c59d8f. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/THG012400717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec92bea53a0bbf594f7e9dcb9590a32cde689a2dd6f114053d8c94c6c5df8fc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/THG012400719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc074ce498f160e414b9d898aab9a91298aadb2e40807bf1eb3428e87633338be. 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/THG012400724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5503c32dae348f87ce8a72bb78ab0e25d8e578fa26ff21d485788088c65eac89. 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/THG012400998.
คิดถึงเธออีกแล้ว
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9d7193ddba4d845493395e04d594992187a3af35bf7c53f1a16a87922183b6. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/THG012401000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdd5bc038cb9eb06c7ee42f726161ec5bef5425f4094a3e6423e396453d6ef1. 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/THG012401001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487ef6c57346c419b69afea7222cc04cc6e803d88ea9b175a2504616d28925d7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/THG012401002.