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 0x071e7437abecbed31381ad98f0d33765ebd6efefa7f094ae264e6c7c67d03201. 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/13df8500-212d-40ba-8783-9a8985dd47e3.json and https://artists.proofprofile.net/proofs/artist/13df8500-212d-40ba-8783-9a8985dd47e3.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 0xed20eaa7d899bb2244042d69bd0e5ff8417e9eb5816ba928c1df97fe02859e8b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FRIDO2412392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff59d295aa7c05f2caa6b87829c0fe0dc9004d61a6c4836df72d4a06c37ca48d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:35:31Z), 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/FRIDO2412393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5f6b5c159dc411f80eac163e0498a643602134a9719b6caf20346224d5c48b. 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/FRIDO2412370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c00689041c3f1e3c7fb0a318c33c5a8e786d26f4714f4917f1289e737bdd14e. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:23:34Z), 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/FRIDO2412377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de4fccd02d270e6b56ccef3572c418b3cf61b0ff0f89add96a64096668cd373. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:43:51Z), 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/FRIDO2412731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4279a9c54f976cf56b1a6eee9f4a3e8c3d3099445020d512b16564f3d6c9a64a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRIDO2412321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dc36f4eac3a2c3fc8bdf475c90085413347aa2c49cd7b5913fc420ba25b104. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRIDO2210986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0ba6a968c8fe5239e0cda3b988cdf726d51d15e6b84b7e7d4561b69081f20b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FRE7T2300460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43038df2f24c51edb682820a29f79a56f36a1859ad4ea1a8f8f7c55916856550. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRE7T2400770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc75c79e693736a69114eb4525eee7543cc7c04146c3c52f7fe72064eb81326. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FRE7T2500160.