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 0x5f331be92e8b65816a75ca748e6316b6fb1ddeb3337419d39177e6dcd7f12e8d. 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/b69a0820-0e21-4fc5-bbbb-e04246c4eeef.json and https://artists.proofprofile.net/proofs/artist/b69a0820-0e21-4fc5-bbbb-e04246c4eeef.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 0xc02a40d9b9322b36913f8ad572a21a60815f050ed5546b9130df0044721adcb7. 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/QZTPX2159233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ef33ee20c13df656ffad9134f3e816da2c95b944ef7b07593fb539df061d45. 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/QZMZ92127656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7478cc084ab0d01c41eaef09475b387deef64e91da82e4087fda720cac618a0. Chain 2 (Bitcoin): anchored in block 956995 (2026-07-07T04:27:57Z), 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/QM4TW2462939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0f2e59e0e5c9ec74daeb3cf62371ff5a0fb0f53658763e70a3ad19a9f3d90e. 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/QZHZ62177589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad71993ab301f1cc57bbbec77298c09e6feed489ad67fb0a488d8d2f80d322f. 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/QZW9L2249674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001923fd866b37e2fc23b38c802d6678dba61266e03f2fdfd9af30ccf844859b. 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/UYB292411305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234fd28aa1cd8a35ea0a6643abf478d90302c604feaf84be9964714c6f447ed6. 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/QMFME2202637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72527168d0b8ff4b067dc12eef7b485a910e1ffa55cf09f82c8eef070af011d6. 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/QMFME2202642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4918b479f6a54dbb38ed847b2cd8dcb9a40f87bb8836bb5a776ea83da74a32. 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/QM4TX2347842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6429c484189330844e106c4db365d9c9736eaddd2b31bbcd7538f409143bf3f8. 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/QMFME2202638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bffcb36d33e02833b1a7cff1388c5f12fd9a17dcfb30767b4c74f59c80a0b4d. 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/QMFME2202640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607f68bcf5bd51868da0a0fafb4a82d580e5a315217cf19e7971cb0ee2926d2f. 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/QMFME2202641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffad583e37162b2b7f4868e96859d74aeaad370b6483d0e741e350fbf70c597c. 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/ARIXB2311672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19f3f2d586f65f2137f7819439cc5696d27d3ed0b3ca2b539e2696e6e0e3f3e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ARUM72200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234fd28aa1cd8a35ea0a6643abf478d90302c604feaf84be9964714c6f447ed6. 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/QMFME2202637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6429c484189330844e106c4db365d9c9736eaddd2b31bbcd7538f409143bf3f8. 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/QMFME2202638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd08ae98a2e9c2b931a8058074eca806e10ec5ba7771894f80dbc92b52b7891e. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QMFME2202639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607f68bcf5bd51868da0a0fafb4a82d580e5a315217cf19e7971cb0ee2926d2f. 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/QMFME2202641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72527168d0b8ff4b067dc12eef7b485a910e1ffa55cf09f82c8eef070af011d6. 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/QMFME2202642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcab53acd2374c16985d105c93a5d268e3e729c08f42dc572d8701bdf726bb21. 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/QZTPX2188024.