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 0x52ecb565432c4582569f0eecbd6deabf037e55f86608b4ce454b45b6a77057fc. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32ed1d32-587a-4c60-b469-18e5634b59ff.json and https://artists.proofprofile.net/proofs/artist/32ed1d32-587a-4c60-b469-18e5634b59ff.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 0xffe0ae4fef7eb782eb5ecad2945a20c1a491d790de5cbc2707c85a31ad03efbb. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CAKVZ1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd549bc1bd6d29af27273ce1fa0e5d0dfe12fddb7ec9475a05e56e098d486e5. 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/CAKVZ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3494a8ec31076f44efb103faa8434e6058fbbcd9f4781076c4117da8c8a9b82a. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/CAKVZ2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e3fe8f5386dfd0ffa8f737f61aff911cd6df27c980eeea7824ddc912d2a554. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/CAKVZ2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2d11cbb6746d1e2f44ce63fb579d39d614b6d8e13c5e47cc7b918d294d98ad. 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/CAKVZ2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a622c45d370ffa3c9df6bfd80e1b0389bb13049e46d8db5cdeca271288acc8f. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/CAKVZ2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c97c5bc56f8e7ed5521b42b323baa84dbc62759637283ff3de5b608c8026e3. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CAKVZ2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb1ea9568ed07ed06944162d0bbbe01efdb445dbd5834cc81ee92ca0d52fe7c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:01:54Z), 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/CAKVZ2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8e9e3dce82721eb8f7a0b7694ab9aee779e0507059a6f28b252adf0269192a. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/CAKVZ1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1432ec4a18558b2a07be2ae3af05ed818ee7fc895bc1af94fd5b149ef7c2f036. 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/CAKVZ1100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7384fac99d9ccc0b1d95c97e6905c13c025ad42243a5cb94dbb6edf3aeabb5fb. 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/CAKVZ1100009.