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 0xe023fd891c9156f9312e440861d8fab88fa8846059c5bb3943aaa369bf180dbd. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff9428a9-06a2-4b30-b807-ac9ee2f8aa41.json and https://artists.proofprofile.net/proofs/artist/ff9428a9-06a2-4b30-b807-ac9ee2f8aa41.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 0xa77e0f9cd9f90f9948801b8c8c5686f3b96ee7a6c813c22c0b7e6e63ba749667. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEXO71953150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee012c26cc83c2a00b319301e66f5b0312f10b6dfc555f150af0f2430a3de95. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEXO71953151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d864c95ad77d8b1d8060861110bf347affac0258b42709f05725a14ab5cde6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEXO71953152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a14f0315ff1b57ea77dbf9197ea0b477337458aa11992a0c85a8cde19a683b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEXO71953153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820af75682ed92d77916f2940e609eee5d9fefc9e1280e5379411eb2b6a4480a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEXO71953154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba6609dcc255f43a2ec248024767359dcd58c7fdba3a777af03005bbb8e6a6f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEXO71953155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa73d9c22c0fa65ae61af111fb952d4cdf7054146f331929d82da4f8e66d49f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEXO71953156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664a021f2c949568ccb6bcc85f3ad83e6ae90ee50f17767d2566860602270183. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEXO71953157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9e5f59d33cb6ec084c00837d851a7ecdadfc50ceea4a04b996b08eee5d1282. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEXO71953158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c09e009a98632d04e69e804f4a27ffb048b30c6799a035decdf2f8faf8dbb49. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEXO71953159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04fbf01aa81fd3bc54d778de1fda1e16f82a303b3a8f866859523fd24f29dee. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEXO71953160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697357731582438234c52b18d6d21fa8904bebbbcd3491cbef50f724f1ad2855. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEXO71953161.