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 0x687f475b7abe4ab73094d5c63129cf967faf0216e76338f0dda2d97d33e8ba66. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/24484628-7e2b-429f-9a85-55236d265b8b.json and https://artists.proofprofile.net/proofs/artist/24484628-7e2b-429f-9a85-55236d265b8b.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 0x2faf27bcd39a22ff5036627ba6f0e6fdfd40dbb8549bb98ef695766ff9b300e0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAFO2125456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7c398f0ab7062de2a2bc3d01e0c28e9e8e11f27daf83e6c6a60701bb610dd1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAGU2386123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7db5e92f1c1da695b54892d6e18713b916e6c3172415249e8e84c243ea6f8fd. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCAIM2438371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294b9486f7601c7e46136c5656d02beeddeadf8ac288e11d7c736eb91ded33cb. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAIW2444927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9652f2d3a7728f1b62804c1a33a4816536e21a036ed014eb903fd881ccfa519. 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/TCAIW2444988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00620d372bc40dcc5905ce9022bdff202d03b0594f2d515eb76f6ced8d51a24b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAIW2445003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a078b32bea4ee79ede30d446ea4148ed3a77357c5a171f263eb77265e652f55. 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/TCAIW2445191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6a0e12b1e55a8659c3fd6af21f5b04eb1d6ebf8fca9c5facd11cb3609ce003. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:25:25Z), 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/TCAIW2445214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee957639d888288aaea47b5f6d6c03849bb200968d879773042e43c98dcd965a. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/TCAJR2555078.