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 0xd1b23db06474c46e2d420729ff7a34c1b491587fac1e5dd7c87ecdd89dc3ea8a. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5559463b-e094-40e1-96de-5c340bbb3ca9.json and https://artists.proofprofile.net/proofs/artist/5559463b-e094-40e1-96de-5c340bbb3ca9.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 0x73d8c69b9b2c2b58e70e235cd0b2d672114c4d857735460ddb74bec4398d1866. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FRDX62210430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d8c69b9b2c2b58e70e235cd0b2d672114c4d857735460ddb74bec4398d1866. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRDX62210430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999364eed698afdaaac5b3e0d59665d3cdfbe6f22839c4fcb6e11faf7b7a80be. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:30:37Z), 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/FRDX62306740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b14091b626bca42141597e6fe8c68c1b93d178c2787f595d9d0cbe6de884bb. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USA2P2424191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af4e698d3bb5ffc793bfc9fc89881b982121d18bb51e95a1206bd10913c5ef9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2P2424193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc5be42c421f6cc6d09991fe0e3b9787a5240c497386dedac13f47198d814e4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTBE2574367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ba6ee0d44a66bfd2b016711c8d372e655842aa34c168634f70b2899f4dca8d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTBE2576497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8f48a0626f46ab676976d36bc7fbe2957bff9eaf277e32fe74ab0c51c0a4b3. 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/GBKQU2368784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b734966e11ea50511bf746f8996d5614299384dd9e235fcd598da1ae5b493d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FRR642401649.