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 0xcf3d58e4844eb3bd5d8f598345567706fb3b22ea32fd7f3dd96b2865040504ba. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9b4e201-af24-47a2-aea2-809e4882edeb.json and https://artists.proofprofile.net/proofs/artist/c9b4e201-af24-47a2-aea2-809e4882edeb.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 0x0e6dc11bf14cd1d5f013f71120f21566c07b6f5cebfeecf65749bf11a762aa78. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM81365178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47cd2469a495a904383e7cae7a767124cd7f54f1e88a39187cb2daa74ca3458. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:59:50Z), 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/USHM81365182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bb031fd6954330c24b2e02817bb8e17a2d5fea5d42fac0ed019c3638b4b64e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM49A2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c4e082defa5b99d89dc37b30de62103a6b05653c2489b4c68b10d72c8bd7da. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM49A2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41226d25e9f2bea49fe0915b0363c38bafcdf9ccfa850e15ba4719051295d39c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM49A2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577c14b74690a99041f92324bce1cb82b05cc396f9a2b8f797f8c831bf5eea95. 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/QM49A2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7294077ac523a587446420be60cbf0dcdd150cb7c57fcfb9fdae770cc37f9af7. 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/US3DF1913386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbe6692904a995172a26221cd32d1c07219cbd4f3de0ab3bd5e49c8bf7bffe4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US3DF1913390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a94c942d764487c1d557780b29d5c09fa953cc94e4ac85c28d304d5ea16152. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM49A2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1816eb8941e0297f35fb4c8545c9b950a3f54355c05e152e6b1eca10163f4244. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM49A2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a94c942d764487c1d557780b29d5c09fa953cc94e4ac85c28d304d5ea16152. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM49A2300005.