thumb|upright=1.35|The death of Roland at the Battle of Roncevaux (manuscript illustration c. 1455–1460) The Paladins, also called the Twelve Peers (), are twelve legendary knights, the foremost membe
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 0x7b41d690fddf8a5b0cbf110c72d7975ab15a4de58b264b6850a6c28d0343b848. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cd40661-dcd5-43ac-977f-8a9fd7c06c60.json and https://artists.proofprofile.net/proofs/artist/9cd40661-dcd5-43ac-977f-8a9fd7c06c60.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 0xf6d40ccdcd6ce51672f732b22410c453e775b4ffb5c9dd7f109325e760a16cd8. 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/USERN1009915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80850ffd9be32659ba67a58f7168869fd17b9ec3d65524285f8b78002619717. 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/USERN1009916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb3c5b2116feb28963da50cd8fc5c981df362949fa196016a8d8122528eee36. 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/USERN1009917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a5f0f58c5297fbe947242f69fbbae15d8401f5ec6eb338d4a464ea532ee99b. 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/USERN1009918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5883dd6e16f8664e30bfd8e5ee958f959d97eaf0523b1080573a0209e37c9c0. 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/USERN1009919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8074a83d83e2ee8feb3ff7d30f8fe1094943dc81f29f23bb4c44f2ef6a853e84. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USERN1009920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1874065b1a6009ad4bb80a901e2719f58fe0845a4876a609ba2ae5cf57caa66. 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/USERN1009921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996e595a3e9c8f0d4745c14ae99cbc24cfd069bf6905894ae5f5dca546f0020c. 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/USERN1009922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216b16a0c7ba118d4d0b768e2e5f0044fc4fdbbac4cd8f5958e9ec6c5adfbbbf. 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/USERN1009924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be4d65e87d280a97c2c56e34590a0a7c9b51b44125359bd02ab875301bca98e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USERN1009925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3103a5eb30ed12e430cea3437cd77cef146531405fa4d54e23fe6b2efc3a7a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USERN1010153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df24c067b3b308498af9e510b4c92a500efe8acde99f91a72cc939ff3d48ce9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USERN1010155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d40ccdcd6ce51672f732b22410c453e775b4ffb5c9dd7f109325e760a16cd8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USERN1009915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996e595a3e9c8f0d4745c14ae99cbc24cfd069bf6905894ae5f5dca546f0020c. 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/USERN1009922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7e41e471633e6cbb666e734212be1451049875a3b01090867ccaaac59b411b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLFP2350889.