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 0xef49d27a08a630a98f58467795220c339c87b6eeee3d9bfab52ac9b628885c78. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0be7e5da-50af-4be2-8aab-b1dcf3fee6c1.json and https://artists.proofprofile.net/proofs/artist/0be7e5da-50af-4be2-8aab-b1dcf3fee6c1.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 0x2099661a049621d27bc35fd0c3a79119b6f2b24f2b089412e23c1fe6472524e6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CH6541963559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4039f0968d811677cc8f1fdbe11b171fbb997770dcf5cb813cd28d83330f7a02. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CH6542140187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb137a571db088d758c36b2909871d4d50fd629a7b8afe5d1d7c84a2d190f2ae8. 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/CH6541679621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8efd3436941b771fb8e67a94506bb0f66fb99e18427fde50739171ada69072. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:40:01Z), 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/CH6542234816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc3d5a7cefc2dfda2cacd1ce6c8a6e78db2ced6d8bc03fa948a6a69330a2287. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CH6542273750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d95613eb47d03d33060c871118a65f0e89b94ea3df4fef48c4fa88e8bd7dc2. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:02:55Z), 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/CH6542519407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825a08c680f403edaf2cb1df9342de0362a0d8b8a5a9acab5c914e2979b8c4cc. 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/CH6542526970.