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 0x2c20457ad0fbc127f3d73b012eb28084ddaf4e4f84f5c976fd55f7447f555183. 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/a23f262b-9b12-42c1-a159-c32d6e6d1308.json and https://artists.proofprofile.net/proofs/artist/a23f262b-9b12-42c1-a159-c32d6e6d1308.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 0x0318914d4af5dfc4a76bf04cef2a912fd43e88c2243d112cb6bc344fa8f0a7a9. 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/QZFZ62460706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5693be8a8a2288b6003028d80fc86a1ecd2d368dfc3cff248badc3dec0664ee7. 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/QZFZ62460707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296e562a692bb6c4ec8f17b98ae3494bd9b7940542bbe83e6831070c5f46e09b. 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/QZFZ62460708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5c6b0755c6e9f1fb8963ccd192e14ec8aa6f2e311778b1fa1b5cb56eb00e29. 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/QZFZ62460709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8d998522ff87f2dd76a52cebf209eb9cffb82e7bcea9dd42eed83ae95cedd7. 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/QZFYY2466845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0e7e1154e46079c8d9b8732574df06c0cb859c37831ba96b14914d73456159. 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/QZFZ62460711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e14f791a07c82559b2931dff8cfa01fd288a9781a06515716a79e939afa7d5. 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/QZFZ22433901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2535d95e6a7f8f315b7c13de08591f687b5d98de41718d1a3c1943f117915813. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZFZ62460713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf65d42e6cb89fabe23c092aa89e2dbd4199adfddbd51ceaa9e8abfae87e83e. 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/QZFZ52199609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cded48df5fcc1eedea9a3c9d72de469337b88aeb91fc77ade14f0e031348fa. 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/QZFZ52199610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1466397c92f59a55ba74fd118511825141a34cbef1f84c982687fbe8b69b88a4. 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/QZFZ52199611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e9619ae8b74179c57583d4ba756f902596d38c25134871202da7ef66f6b50b. 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/QZFZ52199612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd90a6ddd0ca5b06ebd086d7395d0e1aafb6521aeb5452f4c1158c88ef980192. 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/QZFZ52199614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f29596741b46493eec57d6d0dcdb9bfccbcec3dc5aab88f4dbdbf44855dff21. 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/QZFZ52199615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e14f791a07c82559b2931dff8cfa01fd288a9781a06515716a79e939afa7d5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFZ22433901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8d998522ff87f2dd76a52cebf209eb9cffb82e7bcea9dd42eed83ae95cedd7. 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/QZFYY2466845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e5a19c3a466de157dadac09140da5275ebaeb85036c44717f9829d693d38ec. 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/QZHN42279238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f29596741b46493eec57d6d0dcdb9bfccbcec3dc5aab88f4dbdbf44855dff21. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFZ52199615.