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 0x0f69aff12b2af109c50889a9d3536f2e5c72bbf11a22a31b9ae163a1add2f2b9. 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/c1dc4bbd-9e92-4140-a84e-7ac59018e222.json and https://artists.proofprofile.net/proofs/artist/c1dc4bbd-9e92-4140-a84e-7ac59018e222.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The lion sleeps tonight (Il meglio dei cartoni animati : il re leone)
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 0x381a03fab37f8372a5552f6b7d6f0a59e955b477ebd42547a05898ee2c64b9d2. 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/ITS042100389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa131aa02c9a9aeaa45a205aeea101b6f8aad08f4abfec719b91d5f61f4fe08dc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITS042100393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad7042c236b184bb31f6dcf72e517e388deee9435706d10a6ccad70f969774b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:00:21Z), 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/ITS042200468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd71a163752f6a4e66d5e866a6e6c8dc9700369ba971d93e8d3676a2ce25550. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:45:02Z), 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/IT6CI2100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2208e8e70551a2946dda0ca2b84d21929288f9b1a7ea8612a866fb208cbcdd9d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/IT6CI2100059.