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 0x4d627c808b08b370ab3ec5077fd4f44ec965e993ed0dc1d1eed131f6ab945c85. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af620601-10a1-4729-a105-144c0b4ef658.json and https://artists.proofprofile.net/proofs/artist/af620601-10a1-4729-a105-144c0b4ef658.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 0xf3ab3e44c8f4aa02de3153de775162bf35fb0af348d685116aade7e34e4d9f80. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCAGU2363878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fa9a7043a480f7f23f20cb6c4ec32ace2ad714259f01993d4a6ae5db13174b. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAGU2363914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f1bf86a0dd3263093e987406657566855911f2536d632d7d395113a4e66321. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:56:11Z), 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/TCAGS2223562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d26f9b081c3c1b71a0424e7e300d0349fbe5c0d4e5240b35f8fbfa43e0d08da. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAGS2223596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f54cbb67c817183ddb81e9fb5a962774f229ba55a4b59b9ef91fdce2ca2218. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCAGS2223630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6943e3f3f3c06857ee695e641605898262f57cb5f1bd13edd1d38f0d6e43df88. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:53:19Z), 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/TCAGS2223658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7080d5e22a81bd3b6ad60d9dff301c24f43107f4bed0f7030c51a953469ae8ff. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCAGS2223719.