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 0x9b1c64a5e7e5102c00323038153c72707fd1278f1fa1b8946916aec84a88a03f. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f3e9c7a-e3bc-474a-bf47-64ef1bb65ff9.json and https://artists.proofprofile.net/proofs/artist/6f3e9c7a-e3bc-474a-bf47-64ef1bb65ff9.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 0x7a0e418528c55e0b9536b199cc978dabc46e8acbcbd1585688820d4bf9013a5a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKE672300894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7a4dfcbbd5889376295b8adb87f02a1da1b1fd1f205fcc279c349b7790f4aa. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKE672300904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dfdfc33a06dfe5a7f8b1d4e123ff96471d0b326b8554f762f17757d70c5017. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKE672300905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7d47fda1d711bc86d65256f217978fda0ec4472ddbd4c07284580e1e5ae089. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKE672300906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf017fa8283d796067cab078cd45d526469b08c021f0e3bca14c1f989901f7802. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKE672300907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0e418528c55e0b9536b199cc978dabc46e8acbcbd1585688820d4bf9013a5a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKE672300894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36aac55bcb185f1a99bcc9b25274470214dbbcbd41654d97db1f10daa628f4d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKE672300908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4501da46320ae208c019afd465521afe35027d7450fad9785a1d5ee14051ac. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKE672300909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa8cb2561d2afb5b520191432ce7f94a4acaff236a99c88c94935424857909f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKE672300910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fb3cb74bff7bfecdff59bcad2641e52f3c2d6d7f3fadbef518c1463b1baac3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKE672300911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb055ebb0ec06a42841c847e25300cf49ed140663574c1db9e9109ded519ad1eb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKE672300912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe823dc4b09d529f8482a65528283d3ab7fa37595908cd259bc698cbd3a233949. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKE672300913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe030a7d4df69bb0e3a4ed2ad2d2380681fce5c7f1a1f6317c785078207c192bf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKE672300914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bbc693d7fcb82a33a66584b5e07cd1976024264da5d173be9721831eb5206f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKE672300915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfe7995ec05e7c5da323bbcc90040f97a5ad743b2544caa5ebf61e3112f6f0d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKE672300916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd41358338148a66a81127bd4d0ca54179f963d43d2e6f5797e54b2ffcad655e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKE672300917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9097dc66472049faa4ba38af2a0090b8ae606d4aac3ace40eac7df10f550e61. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKE672300918.