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 0xbfa24110e572107dca8e5bf649834d752767f460fbfd003ac63710512a490e44. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aba711ae-657f-4269-983f-d2b7afb8d339.json and https://artists.proofprofile.net/proofs/artist/aba711ae-657f-4269-983f-d2b7afb8d339.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 0xcabf29444f1b38b7e4fff1d44652cffa792e23e64f5c1754b4084412ee9141bf. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:05:29Z), 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/QZNWW2466552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1963b04bcd35fba61b04904ac82bcc7a2fb72d3b846dd03a437abc43e13e89f. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZNWW2466556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecca6f7f637476e18e0262cfb13b7445972d5377fefaf75448025cf510d6149. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZNWW2466559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329e6e332ba4aa185e9fb5b06d7d9ca170ede41cc06ba9c94506077d3e64ad0c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB32417657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276903de5ff6b1a9d1e53a777e12b82db5c7da61208cfe95a6984272425cb692. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:46:47Z), 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/QZTB32417662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d459f75e8dd7c963a429671fbccf7d4c4f58a5bf5150cff6e3b767d18b6dc79. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZZ7U2477326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c33f4c73cf718262675acf4fa7d609add4e03902a98cea405a516d91fee3c3. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZZ7U2477329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07b16d5d789950983892e33cc7ffc89b98916926f30f262bf435d45b2921952. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZZ7U2477331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc84d342e22b3e7be0890a41e148a8b7ad5c62111184a191baad02e53a2e010. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:05:01Z), 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/QZK6H2563364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45aa00f92548a29282339e735c9b8adc82f338041b83155e2df9425b511bcfe. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWFU2514677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9a927b452bb8e6f5076b33ab0c13c927e1466b956106275fb043f793214869. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFU2514678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5529275fb0dbb52bd58efbc402d629fa8c82e64b7f95d753042f596b043d44. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZWFU2514679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476a6377a7b6700cb68d9ff6a3a8df90db9bbb4f92ce10966c9862578c9caf1d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZWFU2514680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67e1af46b3a6763e999d2f359d2b4090c3dfac9b3dea6e5d075bc1e23ed30db. 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/QZWFU2514681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7695e7e3436c7ba931d83538811a5a58bccad6215c014f69b3bb0058ffcf8d0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFU2514682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73c87be3580a46c56c0f496d6b923987f9facebbb4a080e58b6b0ba4d6419f5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFU2514683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5962b047958b41ff27b0f00c7abe3ea51e8540bdbff72bfaab496bc7193584. 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/QZWFU2514684.