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 0xc652fa0630145ee871cccfcef2ff10857126155f4225321e767d1ee7b58a1259. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9def080b-a3ff-4446-bb36-6b860ede3b9a.json and https://artists.proofprofile.net/proofs/artist/9def080b-a3ff-4446-bb36-6b860ede3b9a.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 0x446459f33b9741a99726b13c6f188b48a7ce002d1fe4736f8742b8bca863121e. 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/QZF8N1814231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818691c7d57fa06cb8271efb63059a0bfae7379af4381eedb135e9c6178b7fd0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:46:27Z), 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/QM8DG1829832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ad8b2cc99f78f0f6110fae3d7fdc64c357f22ecbcd8cc713ba01115d1b9813. 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/QZF8N1814233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ab921f631a29cf2130b02cfffcac47f7d4cbe788d77d66b107d1de8610802a. 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/QZF8N1814234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bc19701259b51af6e83216d5945b0dfab1ee3c8978b9992df15b466578b45c. 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/QZF8N1814235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d29dcf990ab756860d406ae0c1a6ffa35c15c09e61ae3c3b44e43b5b39cba4. 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/QM8DG1829828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f897784f48b7c86b17007193bd574f956f7ef631147cbfe04d419d9e9b4d811. 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/QM8DG1890128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292fede2c0bed78230788b9817e941acabb187b160e9a5938df22e00942ca765. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:46:49Z), 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/QM8DG1829827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3141a83e14c2ccb5e680e92a5ae7a8595400e6047dbbb1cb804cce75c151848f. 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/QZF8N1814237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7074718ab1999420562b6469ad5d8a4a141b8b13f34481ece7402ea097bd775d. 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/QZF8N1814238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f225d155cfcc28438978a5feaff5d8fd45ed083170a655584efeeada35af99. 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/QZF8N1814239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543182f54327ef67e1d410cd1b199b2e961bc6b298cda685b510df15218970fa. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZF8N1814232.
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 0x2822688f93b459c5d66b854480c456bceae9a12eac57edb920797c648444e577. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZF8N1814236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306d2b715bf6d44a93a7be2160872586c084c828ab54c4d98fb3db9a9accc3d9. 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/QZDA61995410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d058dfe42fb2e40c64e666473b55bf4076fe413c849650f81a1dee4b8a7a02. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZK6L2148044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83315e47bb45184248c22da054f34a28e459386bf76fccb730a4ece3096bef79. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZNWT2294845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164a913b601d9e9e6404c419d3a2bd5a6f517b1105d51e9b73c296ea89ab64be. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QZES91872571.