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 0xde32b1bb1a19bd5d91dd64a7fe8ca249980ca9b83ef4ba3b57e5189bf823ef7a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcf0b35c-04e6-4a9f-93be-557c19272bc0.json and https://artists.proofprofile.net/proofs/artist/bcf0b35c-04e6-4a9f-93be-557c19272bc0.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 0x5f0ee1b4d95514548b82ae93ba7aa066a0f9a4d991bdc7338d8a806427ae4020. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTL92369676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5225c7e0e2afca76dad3925ffa3cf60eb66fd57a8a14710006165f30da662064. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZ22B1922241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec681c09d779cb7a4f56ccbaa15547f31a8f5c85bc46ceaaff0f9474c8ec2cb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ22B1922244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c93bd23a888e82dfa396cd53209ba206c1e037514244932200e96aad9afab56. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZ22B1922248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b152462f44122c073e96a4a858287164fc20c64c3d801b6d180c4825ff3bd8. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/QZ22B1922265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e558fc7c2369e0c13ce8414578e6adbdaf996e459ed28fe69b17e7ff354016. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/ARIXB2100957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c26c5d370dbfd5ff5c0532a03466b4158800dd25ebebc977cb6995d1feb612. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ARIXB2304188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e163a651d113989966655cd4be8cf9dee46256e04e6e671dd197da8cb835ec2. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:27:34Z), 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/QZ22B1922261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30849739573e0bfd9c1b677bcdb0749ff9bca09668302e86798e2320c71316ea. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:36:42Z), 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/QZTL92381953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd91687055e543ab0e41bba0789c5cae9c247ba92d82e4084a7382c9289af3b8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ22B1922242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1a980cce782bcfbf117d50d0e80875ab1b764ca83cc8039390ec3e8252f4fd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZ22B1922252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1127bf968c5574e4f04d808a82bd340dc91d0463b3823b511c2057a05d235d8a. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZ22B1922251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1681f5f0534f8eedcd9df0a02e0246ea9c009b7ff18182e57f8aede438f6782e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ22B1922270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2c6a24c4ef56e5705605763a106afb4aa2eb500242455299afe1fb051daca2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZ22B1922259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60eff75dc4d08179e7a7a3de1a470adec0b44c9b091c855e2e9e60dd2f5428a5. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZ22B1922268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c75e022fc1d83ec6edaa886810364a365bf3d51204b30897b35e7f2afe8a2e9. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:29:20Z), 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/ART0G1807472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152a7792583e326023ca5aec53843d3e769e61e97bb5a27a4c36ba1b29a818aa. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZNWQ2535224.