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 0x572be3cc47ad604e6e1b5e66280dd74e625021d811d24ddd8c4dc5446fd47383. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/532029a5-6dbe-447f-883c-ca9cd7efd102.json and https://artists.proofprofile.net/proofs/artist/532029a5-6dbe-447f-883c-ca9cd7efd102.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 0x168eb6e4af0ceb4e0ac81055b997c4a336e3af0a22f0a8417932fcb36cf4e9fd. 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/TCADS1865740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c0b6b91205e08d13645ab45ab17441d681d8d142b976b859c1211c7025e4b8. 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/TCADC1716239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1e309c6a6f9eeaee0d664c374712129d2f39195141e8be4d85f041b6d2e163. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TCAED1957228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31527ed46405142a2249fdd8ba006d466a390115b6585073fb238c4a8c40503. 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/TCAED1957256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a56dcba0a2010ff0dabfe98e4bfef51962e63d697ca7e2744fe3e5c7db30b6. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/TCAED1957285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c249baf84b72c6e5eb34a18ffe3da1d6e32dd4fbed40ec09577f1cd918f1f6c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TCAED1957481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22a4b680f2edbaa71565e3fb5d83ced5dc0e68388e681c1ca7ca46a7c7f8e2d. 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/QMBZ92353981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5125e9be8058577f6c7b686a5de8ecb828cd78202adb5140a627df27b3c592ef. 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/TCAGL2294589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0daaf1f3b87dce0ca5db6b1118cd7010a28fcb5f1390cfff7b005862f8b7957. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCAFH2065986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0f4d75029de9c17c2fccdd97af08faedf13f5a73e35d2071dd9334e60b9c69. 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/TCADS1891749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e832f105cdc2b0f7f26ec07dd6c80480034877832296914999f883e355805f5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCADS1804921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a498893906ffdc164e4256b6ebe19ccca0ce061719747d466b5d2b54e925fd. 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/TCADM1880811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79a57e80d0893bd1c50ef16e5e34a3d6c85c8e43dbf21152414d749ffdbec8b. 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/TCADF1727105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f2f9c7da8982eae9891585c687c1d81d7aecbdfc5d56cb7bedf28fa37aeb70. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCADB1748212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10983c1378af52b1a6ce715a2fe3de8036ac3e190d1e66deaf7f6651d55ea920. 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/NLR6A1700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe940e124cb9b24197e4fb3b60d0ea09b9805ba8a5b8efd3ffcb1a4750870d0d3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLR6A1700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0767e5ab78532f622f874dafefbad9e4f8347a2831409c483c36f3390b2abca8. 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/NLR6A1700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5a3d3c938d582190b26bc40ea2d06266216d9a506658cb8e97aa90cda9b460. 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/NLR6A1700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dc31f2a6f574e5985bbecbad1a6907897a704fd21a3c3140b3102932c29c0d. 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/NLR6A1700039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b72f7fca5d0e68064631efaba703b7a05df50f95ae0253553b30ae242dc375. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLR6A1700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f5a829e90f381994a25c3caa82a7c2814f06c8e46897aae872824a5806c828. 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/TCADK1716944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a9044a4c4c818d5577214c82b3da415cf810440f72981555082bce36c410b0. 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/TCADK1716961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f27b62b60f9f3c979ca5857bedbdcb2a4c3fdb9986f4bdf01f228247a475115. 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/USDY41785337.