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 0x7d308b39d26602dc2de3bec153f1c173030523e0864ae31ceb4b1eede0d6d2b1. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a399d99-eba0-4876-a983-9425865d53f1.json and https://artists.proofprofile.net/proofs/artist/8a399d99-eba0-4876-a983-9425865d53f1.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 0x2fd9762e2ffda8c8c5dd9426f5207caa57a37ca56b861aedd1c81c3fbee6ab0b. 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/TCAHF2394559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76eadc8e38fcd95db479d39e54cfca549558335aab8e42e49f58a2eaa47d394c. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAHP2344678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3298ca557b79df478f37a4f429ef010716ccf532f30abaefa1719b54cbff9d5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAIV2449435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064d952a8ec5c8da5fb386c3e72a2dd0635a012e8d8fe290ad57af6f1ac5d438. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:42:46Z), 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/TCAJC2442369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2baecc9e032f6c4420029d3d68a97defedd4ec2c3f0f85246bd4f9f13a7e844c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJL2592556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0a2f02b7f9a1c0ff2cf9d16357579fe1ca12b32f3dd279cfa9064bbbf4aa75. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJT2537881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dceeceaaa1ce42e7d7465e03dc302f9d87e1c6e4ae0ac86ef0c07cb844278fb. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:22:13Z), 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/TCAJW2555823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa66d6de512b260aa90b619b9a0271f31e114865770f9f7c1814a8c2d6a2defb. 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/TCAJZ2591053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aea0af0ceda5001372b66e591187ac5ddd68234025f707187f18a1ecb410bc1. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCAKA2591089.