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 0x8aed2b3d45c9f21e2669a73e6583576c69b754154c0c0d2fb795b7173f9c63de. 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/437e5cac-37aa-4067-9e9d-bb8f7a06bff9.json and https://artists.proofprofile.net/proofs/artist/437e5cac-37aa-4067-9e9d-bb8f7a06bff9.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 0xb70ce22a73f89bd14126690fe6f3eddd02abb670aaac6929621dc6c3c58c947f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN82375028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535b25bafd7092d42121c216f34f4f36095daff094c425a69021dcd4d69336eb. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHN82375029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4a04d12498b72b6f7921446bb6b09336b323af2db01cbbabe7411752530cc7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHN82375030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b5376610c30fd5a0d05ec2a7e8d1eae6ec6c804130fdb792f7cbd5889a0e41. 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/QZHN82375032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aae133e154453e0114f7535cd2859c49f5e98346359feeb52a10988c5cf7b5e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHN82375033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cc1b4ef25e9b3e45173abf786936f6eb4333431951648fd21a32722fb3a97b. 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/QZHN82375035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32926e64318e52bf686e0aec54f61750a4bcdb7e462b0e88262f4da707117df6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN82375036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1ae26c77de1b8cde00d22ebfd7042a3096251431ee1dfe4e9e38ae89334c1c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHN82375037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ad2274c61bc2f4ba075d6043928cac18f6678765358933bd958505a726b5fa. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZK6L2321038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41540e027c98c029064a00a7fb4d3946ca9f1300899728e82005eca4b604172b. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZK6L2321039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420edba01f8ba5fbfcbda0460474ac3c7ec4a025e742d65ad6ad376c982f450e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZK6L2321040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec28cf9f71aa91dd4ee7f445818fab6e0f08177ba6821dee037d0692f2da08d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6L2321041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd40cd7fed61bcb6b65797b1dd0c91feaf935dc9d305f5bd5ebc5865714ac78e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZK6L2321043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47cb3ba12dc36aa551e44d41204179f24ee1ab9a7881e48f46ec59ed069ddf1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6L2321044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa5b3850e4165f7754cc345f8c23cedfc85d617def1d47a9e87c7d0362be4bb. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZK6L2321045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10db930c60647f87b76c5d524e29dd2601608948a61f4fddbc3dd362bd0758d. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZK6L2321046.