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 0xac57aca836510cec201e1eb770fa4a298ed3b93c975f35e7db5a72e72a147799. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff42233c-e176-4972-a824-1c93e0977df8.json and https://artists.proofprofile.net/proofs/artist/ff42233c-e176-4972-a824-1c93e0977df8.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 0x50d61ee94af3c3008854d0c1d67fc71aeeb54348a79126ff56b1b4a99de35d0c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:35:02Z), 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/SE5Q51805886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7230f6782a11ce97c9998749de5040ed6fd9e5a981f50f512827e3d9e573f88. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5Q51802251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd2c90e24370db9e24d4169df8c407824c77f8d16f433600c275db03a733548. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SE5Q51807480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035a33250bc9d1c1096a906407acf296d9d5c3831033c33679f4595380bb3557. 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/SE5Q51811824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d8fd914ed996bca108dacd660143fc650c9712321e01bf637a74593d10f206. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5Q51811686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c937e3ca7702d48715c8224842c0588cc712f3fb16327fd844b7e143699dc0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE5Q51814346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475f2bbf86504108b6bdc9d4db3a8299d3cf31daacffe21cf1f19bff968c7be6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SE5Q51818119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ac957d03d883795f9cbfb5eab5743c2c95dd9bae3cc2aaf4832df143d96bef. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/SE5Q51822260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b473c16ff9735213748097aafcbe60dafefc16b448dad1be6e73b808616d34. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SE5Q51808056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35454a9f94e529613cba2014eff6ebd616c5a364397f85e193fd74a6b6c4b31d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:27:46Z), 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/SE5Q51805352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ffad4ae4726c05e5f46e7a909d38c901a91b8642a00c75a76c989364970b71. 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/SE5Q51821955.