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 0xb8856fbed56b781aee44e219afad6a13317c479819b27b553168129dd3a5b6a0. 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/28335e2c-e35c-4f28-b929-45a3d0a5592c.json and https://artists.proofprofile.net/proofs/artist/28335e2c-e35c-4f28-b929-45a3d0a5592c.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 0x612815f216b7422a22c8aace74a69b968f3afb8f14cdf8175464ac2d253c9c12. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USX9P1177733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b119f620c4b23b44e5a84f3a5c3cf25fc7ff595220bc9eb3109ab6479cb97e. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/USX9P1177734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c33b5d16eae663b43e324f29bdcafe17fdd420a810ebaac5cea38fbc569930. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USX9P1177744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ce74a66b50fe7b2f239bd4c3bb7761c857e549f4541f0d51293910c4112495. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USX9P1170461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff92d4e9cbc24d86753d6b7f3595a1756add25f2e3924d07b14fc82aa2433612. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USX9P1170462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8366702ed147dcf9118c281b86c2ff4485352132d3378b396de0fe6ee3b3010. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USX9P1170463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec0f94d1bcda389d503d39d5740e6a94ff907d917244a35e234f3fa60c9910f. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USX9P1170466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411dcf9ddd2ff9cb1aa4a8aa7fb67792217ef78a6a9845efd7b6b590c9215387. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:08:46Z), 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/USX9P1170467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2583b6ed566efb6c565927604351b6ee9375bf364710dd578aa2cf79dc766bd. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:08:01Z), 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/USX9P1170469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cd5dca69e8b230bb32bc01d51b39b1ac3da316010fb17278006188310a7ddf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CA5I61100003.