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 0xa7f37febe57d9e03b36b22b66e7a56855f1cba4c2afe1a131ae08e05f02cb002. Chain 2 (Bitcoin): anchored in block 953972 (2026-06-16T16:31:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2991cdb8-81ee-4ca4-8e92-07555e191be7.json and https://artists.proofprofile.net/proofs/artist/2991cdb8-81ee-4ca4-8e92-07555e191be7.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 0xde6e4f9939c993bf274c1fab1ba778749f9a976a918c7729c618fda6b4511d43. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/SE6I32101621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b837116b55480a464e0d06af55082744ac26fb85d3931a5643a63c6ff40255. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:19:18Z), 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/SE6HN2194844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc687c6231768fcecacf7c8c8e2e458f64a3860ce4623f039997cced26fdd5be1. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:28:41Z), 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/SE6HN2194845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9654b43109daabadfac12a3616c943b6915473589d6a942d7e54b4ede82469fd. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/SE6HN2194846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b2a1c777871b174669e1843fdefd092b3bfba0f62d4e2e76388ace5d6ea63e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE6HN2194847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad068619401c8146ffaefd25a483a0db0e8053c5692701e2d2d021b07ec93ed. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:33:45Z), 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/SE6HN2194848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70744565a1d20fc9b13d8a7c2b27ac4a638571262cbecac9d4fbc11214d291b. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/SE62M2108189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835d5ccc2d2a5cf8fa4f8bcaa4a517f515a61fd9b47fe3b8a8d7ef02a2a91899. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:39:16Z), 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/SE5752291536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf1735cc8e7eec7c289857d1ff7b295094022fd88afefe0ed2c26990ae5de27. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:24:59Z), 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/SE5BU2336831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f608ddcda56aa6d2c023aad0bab47fcc75b4c8050abf2cdacb1c18b13539eb6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SE6XW2314748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf9ce2902e10fc7bee169ed12eed4a35c2973b43174a5896116d673223df73d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE6HN2439890.