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 0xa3651fefa9b94809112671d903f62bf72a0315bab72bbd51ea989898f54f5f91. 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/0b6ed8f6-d1d4-4254-b819-d0832ba8e8f4.json and https://artists.proofprofile.net/proofs/artist/0b6ed8f6-d1d4-4254-b819-d0832ba8e8f4.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 0x6a8cd71d2057a7d0588273f96e8f869e3f83e02ab226e49a1beec5585d933ab9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEVU52516501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952b10d0d886f36767b956c8f54ef7d9b1622a52458249b5059471fc8ede7dbd. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEVU52516502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d23e2e4be6c1bb37321cfd8da5a6bd817c8372b81bdbb510028f365d9a20af. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/DEVU52516503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55dc234a4e2952fa82946999941fbf05c311c0031aca86392cd7e2a496589555. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/DEVU52516504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10a353b4878306728f44dd97b8f78cb6c66528442bbe57e8284e0c061390fc0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:57Z), 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/DEVU52516505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6930bfdda8dc257defb9c2e1ec3e62f2aa34acff5b82cd15858e878b118efb4a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:43:43Z), 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/DEVU52516506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f018b6efa14ca62bed9da59f77b4c0a47ecb09da103ed7837ec2a2e533f41f6. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/DEVU52516507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c382297023d12a9359360542c1504d76c801aad7213d270e0465c36d923430. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:41:55Z), 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/DEVU52516508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe5df4bdf9bd212cdb819a8ea663644dbd103d1257c7b76fd09082de47cf437. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/DEVU52516509.