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 0x5c3fe33d3287aed83dfe95d495e47af0c0d5d1b7f2aab7eeaf5f09fef5b73656. 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/558e5d85-9e75-4f66-b417-8caba418b633.json and https://artists.proofprofile.net/proofs/artist/558e5d85-9e75-4f66-b417-8caba418b633.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 0xfc578888deff002e4125a45efbd3f54bc6d5209c3a236772a56008d9911ba47d. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/ARA821201558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2606e3422da2419ed95c8de6d798451b4fff4ccaa1c85aae84ff1ed39f45a0. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:04:36Z), 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/ARA821201560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9c95370f2804907ffb945ff7356c71156d539f40bcd2aa6759cadc73c87363. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/ARA821201563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a48e02bacfac80d3380a8ff21b701e69ea134de530ddcf4475a47c2181c6495. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ARA821201566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe6d390e7196baebbdc72fac22feed5a89a71b5022fca860e6dcb9360f93770. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ARA821201568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f524bb8170648c228da1f704afddf6743a226f7e34f676b72305e85436f8e3. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/ARA821201571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c66d993b8237841122266cb0fcab68f33d3fe1cccb947e33644da7fcc68a773. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ARQ5T1500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ff747a1739b009986102a320d9b5ca78174d70297893b26acd75e2277d0da1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARQ5T1500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8a4f9a19cd3f3c799f5e3dad60a52d365c9b9338d53bd8fc2eafef00b24ee0. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ARQ5T1500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ec16e6d44cf69ea3d02ea225ca8c57440e33ab0bd7d12f20b4e350d5d15c0c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARY4P1800402.