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 0xd96560a9db8bce59db72c0bb7f8cb763b7c098bc69ed5b65330526b763f42dde. 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/6b7c43e0-51b6-49a7-8f69-6b0d58d519d8.json and https://artists.proofprofile.net/proofs/artist/6b7c43e0-51b6-49a7-8f69-6b0d58d519d8.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 0xf26ccd24a87a7a1c8a0d082618f1af35be33a745d7769fce325394187e95bccf. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/LBA082200215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143b372411865a437805085ecb0071a633f35ee888beaca4862d62df9e1bc2e8. 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/LBA082200226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9170151d4a1fe6353de961666f8e1bf3f46c46daf9f1088bf6783c906c4f766. 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/LBA082200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95db7cca338f54416cf318425c63789d2c12fac32a4c5f5c386eca42e107b770. 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/LBA082200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb71d3ad821c0039a24b012501cf9b3dba2d8b377fa254966098d0e6ff2f52e4. 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/LBA082310841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448a68baea56d2290cf557a477bad87c015fc81aff6e93f009469ee63a910ab7. 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/LBA082310027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9121d0163bbab369fa0a8954ce911b7a7297ad2f40b41410ca97a75f2fd9ba97. 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/LBA082200324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f80cd8abcb7ab2f5b70d0c07817bd5861fc493fc812260cbf36c52fb01610e2. 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/AEA142212874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a7c56c96ee0f9ec4fc0bc43c44f350f92d9d3cc2af4caadec013c4053ad949. 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/LBA082200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db502d22dd3114613c8155baae437a6b5d7d0f4acf90b125f6b9bdb7fe6584c. 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/LBA132100892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058d4da6ed83ee8346e9dea05dfe549094b6878276908df7ac954b9f26d51101. 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/LBA132001066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0140ed1fe2a64c50e1b7e04096233a2d6ae9080df74a09ddd5fbc0c7ee496d5. 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/LBA132000992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653f50adf546c4eab7710fda42ea5a033090f29f9e99247779ddd2d31dda19df. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:59:02Z), 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/AEA142002578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c9c3cf02cff4b459b52740b80bccade720bfdc76b64188153a448a3845de98. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:59:18Z), 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/LBA131904167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44c00ff58fca7ec2ea8bb4f4487e25c66a94106cde597ebcaa1b782304051bb. 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/LBA131904166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648ceaa71f2f29a3105fdb55ba49a6956c89f69098b4080fa746cdced4671185. 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/LBA131903975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf21a603da0f0a7b9d44328de5b640f3b3f5c1314bb6bcd5bde65ce639dda075. 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/LBA131803006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483cfd30564f853c8bacdc83c2eeaf1e40945e5b8e70e9e4c01aec87bf1f05ec. 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/LBA082400421.