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 0xfa883db0a381a661b6c657b4f61b518289e5f12b1f03ac5312b60662573f6868. 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/54423726-2039-4254-8eb5-361a7412e677.json and https://artists.proofprofile.net/proofs/artist/54423726-2039-4254-8eb5-361a7412e677.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 0xdb40a178754beefb66d8fcac223fdd194cc6d8568c98e3a4dee8fb84cd5407b1. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USX9P1054300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159f9a5bf1426cc302d564459e015447c6a0b0b5332904f25dd49873034e33f9. 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/USX9P1054303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adac5e91722791ff2bd188a78659020edbac0832f074e54e222782af689c5be. 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/USHM91221875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b63bf8e0c433cdafda5ff8fbf7ed5cf52f49cf6341184ba1a132c4b6a1b0fa. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:06:08Z), 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/USHM91221876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0908fcc1fa2db7321e6d5a3ced1bced60b3788f12e077d251defb327b1422d1. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:42:36Z), 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/USHM91221878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0275b143c5f625fd3c388c5e2739f49a5d65c833bff2929394d0d0d59851079e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGH1470912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e775df83bd9560f4ae06d19d5aab32ba359ccda956c3b94daf98b1d9c0c62f. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USCGH1470915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe287d97bcd4c06058c1d50b60ce60afff4eba6c08376111ad2e7eb1a47f5e05f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USCGH1470917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f8ec34186a70d4693c652df40b76b8c4f777a99cb974281ed26dd1357e07f8. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:55:59Z), 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/USCGH1470924.