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 0x34888d6fe161deb9ade2d81d6f5cfcae3d681e4d3cb5e9227f8ca9ce41aaace0. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ebb2c14-8067-4832-b3a2-236de78956a3.json and https://artists.proofprofile.net/proofs/artist/4ebb2c14-8067-4832-b3a2-236de78956a3.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 0x7e44284e2cb7c80dc29d42c1178ad75c1cb5c52458e01f9400ad48a0562a59c5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRX452263967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c04213125acac8faad9d9678dccf6f644d2516499ee85f978480da36dc9c515. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR2F42100680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d585c1d66d4b228e9f35be0cb0e96c0dc0a140e45125fa1d6f555917844e08. 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/DGA072219475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3812500f13c68f3ddd88512ecbcfe3bc53ada19e63bb574207c10ab0165a9b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA072219476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f8e3edc6eef93eff5fbc8e898d8ee9ea3fb41f4d71f981bd6751394131faae. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA072219477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60512418d8e0cd78e8f9c9e8968899d89111a36185d418e4f9f848d722edd5a7. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DGA052270819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4460e5f3135ee180e3c225d5c525ba6ad385fe0674c3b7f85c6c2064874bb6. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DGA072219478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470cf8bcdf4a6091713cbc70722d5e5a0aeace129b31137d2930e4e127fba077. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CAENV1993373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3056bf68a27efe6d0d10b17d4ae27df7f35fd4f63ef50ee748fee2cb39ea2f. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/CAENV1993372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861e163759d9f8606394aceeebe2f1fdad85e969cbb6e5a6e7242d82659cdccd. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CAENV1993374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152bf7e18ec9d63b81d3eb23c5253a30433666ddbadda6694d056afae1a2d411. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CAENV1993375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f769aa978997317cc2c3a72ada41af8e74623d943d67a16b69531dfc4c8869b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CAENV1993377.