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 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 0x69a3585ac7e3122f8397fce0b8e415179afce989f800f353b0e3485231b29ce1. 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/9f852cc1-8799-4193-b035-c0550dbcf96c.json and https://artists.proofprofile.net/proofs/artist/9f852cc1-8799-4193-b035-c0550dbcf96c.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 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 0xd686da39b31526d00b60ec92e9dbd14daeaa168434ad8120d25f87c3668b3399. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GBLFP1770027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79c5628590e46abcf738f3e60408d25d2826d96d590f7d3a8164aa2905b7362. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:55:14Z), 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/GBLFP1770033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47d39e16cceb4907336b63d14a354be5bd6a6e87907f01b174ebc28050b9cbd. 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/GBLFP1770035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717b96cca76731dd589d10ad8641df4bf066f69f6d60cd66fd5f9260e50bce69. 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/GBLFP1770036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef705544f284a53aae71725f34a13498ba35385c9413d644b63238a3fad0a0ee. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/GBLFP1770037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113eefecf99e6670dd4d48fa2ff41e207279265e383b5e8cd7732b7be0f2d8a4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBLFP1770038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d63d3d7602d67909e61be4d6fb5115d8f41722315f7f201ae89d4be94e5ee0. 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/DEXC81900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a78688d99703683aa97fc4b31725ca02dba02ebab897685e8468fe58c37a38. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLFP2018837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433db50e613aa6d2d4e251e4625a86a88656c8cf11f93d5f1431a444326cf744. 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/UKXN21979259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275019e0dc3289e78afc24c969017503ceea6661acd4fee5b3b3e2e6e280bc35. 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/UKXN21978905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0c9d62184b5f23f81b69e990dbd9b8bee09dae42a64f6755ce5564c3ccbf40. 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/GX53U2022083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ecc67427f7121e454068f09098f5e65f1a52595fa8f93ac642aaddb6450d19. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX3Q92096196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0822e5c8ffda7edf0d711048dfa986124e8efd08c1cdeed3d0870ba443abb6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX3Q92096200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8c3c4ed83e21d64aad93b915d4ba21dc4b77de46a43c7b19ead329e653ccce. 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/QMDA62306168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc143c69d58b578bc5bb93420de60c0024b9c622a8c47c88119d03f4f873081. 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/GB6ZW2100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe61863a596c09117006c78bd58a602678c1df6d7d9547d53fdd5ae57801480d. 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/GBLFP2043448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e9363c930e9f25756e60c7e069b8715bef03e8dc84d01aa034f0b8871c5101. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEGC62002351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3ceb27a09bd73e77068f2ad929e4813f97500bddf5cff42731304130639bfb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB6ZW1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890b9555e6ab2a9f92995e79041e8c0aaf137534fd5b33b1e46bb8a67a21d0d8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKJJP2000003.