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 0xb636b1bc83041ca53d376ea45eea575912d4ec790928c7b2de87f8eec6a17b59. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7d899ef-e981-4156-bbb6-b0f322eed31e.json and https://artists.proofprofile.net/proofs/artist/d7d899ef-e981-4156-bbb6-b0f322eed31e.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 0xf9838165a468e1ceb4de5bb88b8275bb669eab661da519ef88ea2cc1ee1b15f2. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:29:00Z), 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/SLREC0000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917421b3d0413638ec05d24d3e2518d3f519a5f96aca8d4eac8500c9880c3a71. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/SLREC0000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ef00e4d866ee42a8b56a4b50cffb652dabf5b93b750d2ae45e9ab6281f4f97. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/SLREC0000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ef93ba2f659c2beb986879eda2e9f7bf7ec0c7faf25d312c85cde46d2c8f3b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:05:18Z), 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/SLREC0000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fd2e6a9edd61fa4556fa18027b42d3f58d82778fd2810258532fb595adba5b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SLREC0000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51902c90651cf10a857a41f5b9cdb754d5996cbaf41c10416c19da9e77171348. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:54:58Z), 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/SLREC0000067.