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 0x4aad6bdc5441129530e47a9275b2920b4d79468a848fb1b51022e0b7a982e64e. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc34a8d5-6b9e-491f-98f2-37ce08ff7df1.json and https://artists.proofprofile.net/proofs/artist/bc34a8d5-6b9e-491f-98f2-37ce08ff7df1.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 0xfafe277a5790d137f71f328b33138e3fc437dfc7b7fe0e48ccb5c0664c10f8cf. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:44:42Z), 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/DGA052083670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb6b1aa6bbc23b47d39aa5c8982df132af672b9f77be6b218e84cff227938ea. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:03:01Z), 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/DGA052083671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17dcedbbc7684df86856b432594165b9ac35cb04806c29134edac57914f612f7. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/DGA052083672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3701f2c1a59c3f8522f2219b073f7438df1a4b7e832069a7b63c703ed8355489. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DGA052083673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a59aed428b807030f82a12409f13d906752d978c6dda66bcc0f51ff23944ef4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA052083678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253e4479c70b4f636a5b7a04554ea0c974b8fe8b3c5213386cbf854a163e1c1a. 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/DGA052083657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c2e218ee4c28b9037db0dc755a25f7e35ec9bad878a5623c866ead7882b4a1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:32:10Z), 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/DGA052083659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a694160e8fb4df19386efb8ddcac77fc3ffaeaafd9d0efc247f8b8ab996a48. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DGA052083662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6636954755f2509695069f5cc58608bba24e74b509efd0d48d1682f0c75c2678. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/DGA052083651.