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 0x9fb9c58e48d1d0f351e625e6214d2845b700169daa9fbaf5a25c503e0db1fe02. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ddd544d-c362-4dbb-9c15-1a82e8a13646.json and https://artists.proofprofile.net/proofs/artist/7ddd544d-c362-4dbb-9c15-1a82e8a13646.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 0xc2026e0c4a132b0adee5f5b1c06fed32afcb54ee32529a16c1dd07c53064b969. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAU2558298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab02454e26e99f73d0bc9e2bd355b8e6bbf21481b179f3c1d5839e685995a3f. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZTAU2558299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4451e98e946391bbbfb349aa14ec697895690e9297613e1b0fd778be8dc03397. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZTAU2558300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2405dc3954b89ab7cbd012135d3113bc9a5fd1460928ea3941687f0fc0a68b4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:40:10Z), 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/QZTAU2558301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf3a7103263e9ac5b29c46b4f739f8edcaf8c19b921dd596d66f5524080936f. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZTAU2558302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a037ebc463d15eb829df802b077fb9c51a870e6295694420a2730d5b55e48fd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAU2558303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282afc990f7310d29f3b367e5eea88651f38a0a4a7126d8b4bf77ed5b177f4df. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:14Z), 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/QZTAU2558304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5929a48d71c3707e34982030dcbffad85a6cef1c51a9094a98c51179111de0. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZTAU2558305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b911a391c5cfc17cc6adebd23ea9ee8a36fc7c6a730892abf15cc5b204048ed. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAU2558306.