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 0xc7708d209e83292a73cd38da5fe6edb68e1d21dce25bc92d3a146226ea022f03. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/844b9ace-0ebd-4fea-8676-2bffb53b89e1.json and https://artists.proofprofile.net/proofs/artist/844b9ace-0ebd-4fea-8676-2bffb53b89e1.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 0xa7fdf027bf5e9377008c16e0ddc0aa7c3361e8ff1e7a87a2578e2e3db8a5f4a0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE6QE2078012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7134de61ba8ff0ae727792e0f69ca2fc5dc1cf1fa1000a86b265d63ae20a3468. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:30:02Z), 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/SE6HN2310012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff9a0a4f42c899030f9638e1fd313641c4269ae7d852a45f4e859eb1085fa79. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/SE6QE2355526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1293de1384ed7eae6a712fe7577b33b3e1539293b085fb7d24ec8a6b675c0bca. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE6XW2341702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ffb0857b0cd60f7d6ad700ab9c095fa2fe829f13c41f7ebcc3333190287316. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SE5BU2585708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0201a4c63e83c9a3565d36f07c90bfff7cf1fce6d886d659fac554edd997b0. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/SE5BU2585711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25fab1e353d8bdbeb17fb3014b84ed02e1efe383166c872f6b670f32223350b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/SE6XY2577273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e81571d1d60d0b0389a83832ab44dd8b646a6a9b8c65191b7639de03f3b558. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/SE6XY2577274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebadda1b15de508b590947a334ddec842c8610503bc832df5688c87df7fca5ae. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T20:23:36Z), 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/SE6XY2577279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2950a2d5696f3e4b22ed530570ab3c4e3a6de63decadd757b57889a22ec94d3a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:00:59Z), 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/SE6XX2536545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15639990fa3301daac9254e5588377779b30db6d77479b68cae7e8aa371a30ca. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:54:49Z), 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/SE6XX2536546.