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 0xd038b0c85977a4f121d2f0c31dee1aac4efed2cae02569d15cc234b83cc0d46c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d235d0dc-8cf4-43e2-8e01-64c69ca3faec.json and https://artists.proofprofile.net/proofs/artist/d235d0dc-8cf4-43e2-8e01-64c69ca3faec.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 0x584a70d23e4302f94d37244610b7ad9a7f95b343fdea5e618d1b1054fff4993d. 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/QZK6K2257899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8919d5abc3c46455f380db58b6c2b790b50ea13a3b956910cf34fad5bcb9df60. 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/QZK6K2257900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636a74d18b0cb436e1d5c113dd397933b22792d3ad641bc4ef0a59774bfe3f64. 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/QZK6K2257902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec61fe8f15c88e0a6d242a2eaa7c5fe612a74ed7afb398f0d39c0fc90561512. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZK6K2257898.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8352a9a130c52fc6b74ac70e8c0f821761a93e49336d6f790bf2c0ae60bfa6. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZK6K2257901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6553a7e8ee6118cf525b635b137c83d233c90063afe4c3b8f4489c2618d1a44. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZK6K2257903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17c9261ffc33efac1a7e9beb6065da606512f6c50742707edf93f1491cb1839. 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/QZMEN2134790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670a3b56b8bc56aae3f34ab0d208b581c30ad84241c8087987ab081463e2155f. 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/QZHN82147695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bb51213e1471575586b0fec28376524569958898512d48f1bacd39071ad7ac. 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/QZNWZ2068051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478a114bde9480a38d3c65d869d07ba849f809cba8a1f41f6518f5256430e4aa. 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/QZNWQ2009726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3135f287c6037827753717df992ae958de5c6978d5fdd1783916171036d322. 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/QZK6J2008251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83736ae541c4b819e384b9f97d08cd18cf8f3f02e33a27c5282116fbeb66f218. 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/QZK6N2091528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41fd83e696d4a75f0e665f768b28f890979a5afcb6d050c44de158b2b073e32. 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/QZHN52015838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44207fa3a525b34402a7b011cbf1fdd5ba2a75c60db1cb8556b38323f790162. 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/QZFZ72024378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40979b2319a1d90489bc5568b1623a24f399b5d377b4acdaad05dc4a35f1a6d. 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/QZFZ32076559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08864be049c21cf13dc40970d7dc66a458fe8314fbe46cbc51a003e615440d1. 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/QZK6G2075905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab2c5a04e36af6ca53ac0743d58301a255e80e9f46ec65cf12067dd531b0390. 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/QZMER2470065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc30e7c56997a040e87d92e9d0f2bf64c2ad7005e1ca925ca4181bebf4ee0c3f. 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/QZMER2470066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b9a458baacdf0c655ad4e553f09c6bfe5f09672627799876d90573cbda9f2f. 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/QZMER2470067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b80f49bea2dbe118a1e969ea19939b30172f9ec50e4637981e20544b8ce2b40. 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/QZMER2470071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38081c61b0cac9aae7de07373ee8bea6a4349ec37ebf3532e6ddedb9627c8c82. 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/QZMER2470073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d7a3b1cb0978b926040b6f522617727e464e8e11fe8266ab757d28859a086f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZES92030216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5921689cd1dd4a564e9c7e283aefd49ed52535f2683eacb1fdcfb4e76e3848. 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/USHM92414752.