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 0x80d233a58c74cb7fe95e17085f955592cfe44cbe3589ed241d6870005ad3e747. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b040046-62c1-440b-a362-2c4e57173b0f.json and https://artists.proofprofile.net/proofs/artist/5b040046-62c1-440b-a362-2c4e57173b0f.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 0xdd95694a1f89c5d97ec0a0a13c134ac86d38c148954cec3768a933b9264fc1cb. 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/TCAHP2398590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e72e189aea073b13e9fc0293d9b8ae6d6019c587e217fa0fdf9e8451c6b3dd. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZQAY2414414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8249ea5124c74e55e022ea44a15770a67ae2debafa3937fbbf6d7c316c6c9d77. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZQAY2467800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0141d45f25083f1ee3ff51cc9357e7c5c901777073268776afa96b490c689536. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZQAY2411559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cba419b3648dff1b873b52b574bce51a4ab4934a0ea3b80d1fc973db9ca23d9. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:40:47Z), 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/QZQAY2453168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9f8acd05b70e25b6242f69ecab2cfa4573979e44b79786310472605c2a59d8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:42:32Z), 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/QZJG52506720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0368bef4a573dacfdfdbf4c5c2f1ed7e6eb319838dcfd156999d568489b4c895. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:08:04Z), 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/QZMWW2503993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e133f00e92474359743350b920764f4976873ff7d87654a74e60a96dea88936. 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/QZMWW2585151.