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 0x0f7a7762f087dcae8b43c3db8488c56909869f5bb6dfa30df37f8c663ae7200c. 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/cfbc395d-3732-4927-ae1a-5d32b59b9f08.json and https://artists.proofprofile.net/proofs/artist/cfbc395d-3732-4927-ae1a-5d32b59b9f08.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 0xccad0ce143b9c90dac345e1ac7885ef57d65d528bbbdcdb13db3f47f733e7b52. 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/HUA181319402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a9ba9406ef45336720d59b59f3c8b0a03c1aa626b83831a099ac50fe82f7cc. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/HUA181319403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e36b56556284ab32e508d018e9ac87758d48969b49cb08de4eaeeff8ba17f5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/HUA181319404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4bd177bddf024e3a1ec4531552248a71e1a4cdb0f870d41212c865004e25fa. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/HUA181319408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f13035100f0ded171235ae05e511127a398b9dd5d703664d96f5383abbe31ba. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:08:02Z), 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/HUA181319410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d0fe5a3a222d3ab874a18036bcf634699085e90b1def839603bf5a37618026. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:05:01Z), 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/HUA181319411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53a6657ad5bf26e81f436caf7c1accd6af4084e301c2b0b2feb52af314f4952. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:35:55Z), 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/HUA181726803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0da306e017c42bf96feaf367b1542830d7e4dede371344e24e49a183c54028b. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:39:01Z), 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/HUA181726804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9764029435b9d4637b47984ee8b4f4aaa44ce1936c2df35ce2b15077d163652b. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/HUA181726805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa467af07b2143fb0ce6b0947eaa34b883bd9720a65c1b75ffa12e654963c926c. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/HUA181726809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f7f2ef936aff233340fce846df8d6aadaef805f0ad9b8fe43733aa7381f416. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/HUA181726810.