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 0x47d480325920c8cfedf2a875e387648c405272a12a8454c98a0173b3780bc60f. 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/01e9e745-a29a-43fc-9529-a24028b5e9a8.json and https://artists.proofprofile.net/proofs/artist/01e9e745-a29a-43fc-9529-a24028b5e9a8.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 0xaab15ab7725b6baa2e465975b13152202d7cd77eae615eee3c79e99b83353eaf. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZS672206532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21d33c843b72a49a312d55872557b3975299cc7b467d3462fe310a3edf8f636. 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/QM42K2322748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87e8b58bb2b06a55b7e532d169f801b589936d6c34b9db6a0cc03317d2e6cfb. 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/QZS662444000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c450c9191e11e6f4fd110b1bd947cf7ff220a1713c8ca5c2369b45972615e34. 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/QZS652451995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfb25fb26511e0dba6f01667c7551dae50a1cb82a99341860aa395f72559109. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QZS652448039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33da359fb1bc6afe83ea7493702aca20da019df05e191a4d4bd3af614d918a61. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QZS652450852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8cced18d6de0117d8fa04f0687fdd89585bb6b8ad1c5ba6fe1b087ea1fbc5f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMHP2484671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a773bc1ed1b41985282ac1bf01ee507c07ba85232316c343549ac7f915725a6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM42K2407192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0926184abc163daebfeed3a029464c143cff337865eb4a78f077a4ee2e9234. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMHK2454080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf628f2e3df95c9cc38a15e6b7acfa5091e5e962b3a81ca1e9a826d0337b68824. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM42K2549730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb872c1e4821ee82119e08a27589b74fcfe2201345314cfa1e325e5a212fb25. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CAHQJ2540232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847220afe37d6b2246dac90d8628179ad64f9933c84dd1e3227d49f8112238d9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CAHQJ2543970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da777efbfb544c9209238890b7846dd1c6b37ffcebe0c45dcb504acd2d8f37c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CACWV2505008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556cc1fa7a3c53905b322e1a31a3542017a1e6622f9e5cea9ea83f92f071ff7c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CACWV2508164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36135b5efc4d09de4832143d9beef39ec38db9c7508a52a19db1213367d870f. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:24:50Z), 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/CACWV2526156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8c46c16d26cf79bcd151cfefdb20c4bb91d09a8c76f2b3930c3d0dc180c202. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBKQU2587616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a110e81312b83c675a9109d4b74ad7e944b8da4ce61fa2a8b687a7c53d0e36. 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/GBLV62501625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88aa39cd0c7d0db987ff8f807970addc74ff922372c953b1dfa8d790a3eaaeb. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/GBLV62506026.