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 0xc41aac2fc70db4a16afa19d76670195290612aaa71d25d869b1b1c058c0b2ebb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49675ae8-bb54-454e-b16e-5b8868387c15.json and https://artists.proofprofile.net/proofs/artist/49675ae8-bb54-454e-b16e-5b8868387c15.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 0xd6d845e3fe3b76487f255373796685861e5a4ea10d9878f08619e3ff9bf01684. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:42:22Z), 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/FRX202145419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ec6fba1f0a6a7298755abfb90069c8347f28d4503d266bb193618e8b1a1a57. 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/FRX282105521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4efd0af727ec9db2ed1cd69f6e4ec7342634e7e6a82c7f0590f2431a8d0226. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FRX762155448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322b2ce2d0d92d43f3d5adb6bb86c4788c12ab4cf2c1100687fc72c10c13074d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR10S2238858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd7f4117f96ad04d1be1be278e9ba195def4bd0c651f37046f8d19020350e2d. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:05:45Z), 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/DGA0M2496802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd533a293a26ee6ebd61bdf2d6997d7e7fbdf152cd5de9de1a88c02b1d0cc2fc8. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/RUAH62418865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414e82b4d70290ad10205bb394c6e389cddd75fefc5ddc2cf760c173d17bf1e1. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/RUA1D2510268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18872c71791378a7ccd3ae8c40587b15167781ed7c3441cbe96e8d237c2008d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RUA1D2530972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04656ceb3b916c5ed6c3cabd70e88982415b11cd4a8c081099ee0efa6247f878. 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/RUA1D2545921.