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 0x5392534e0c7091f6df8083d76e2c098d9de473067c4d7a9434e6e6e384f8c5d9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87321bf0-d030-41be-8f49-d686c9d0c9da.json and https://artists.proofprofile.net/proofs/artist/87321bf0-d030-41be-8f49-d686c9d0c9da.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 0x83e8f3c1a9ed7a52906add1126cdec10da9e133a734495199494420ac028175b. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZFZ62158484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d640f71cb19890b3860b057ef68c8a6c7520e6beaa6e46fc45322839da9c91. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/ATIB32499019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f41941758339a4232178ed71eea6e5492ce44f5d6777a40e4000693fa307e6. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/ATIB32499025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3765970fca255b9b5f8b136efa5498da69b99dba9927bae890ea3f54c088ef30. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ATIB32499027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4291ad75d2d4651370bbf1e9b12daf6e4887d34d96dbc96482a9e3ce873ac888. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/ATIB32499028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351680d4fe90141b2463703de5bbb5f79de670cc6cbe0248cbfcb20874c69475. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ATIB32499029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5713fd4048f97f23879c9185c9888b91e5c53b1da88fa9663e1f955bc11582e6. 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/ATIB32499017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cac3d1b264af7deb244e44e60731773ee084c99652e857130f3360500f97be. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ATIB32499023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f41941758339a4232178ed71eea6e5492ce44f5d6777a40e4000693fa307e6. 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/ATIB32499025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2b34bc54aa6641d0c2d147d34725cf78726ecc7e82ca92ef4bb26b7a9b6ed8. 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/ATIB32499030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c29b1e6a8d552bf8c337e43cbd4f3fea318cb8ce2a9be510cf2b29e3ff7c93b. 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/ATIB32499031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe46a0834b251b20def83691e09787a937b94e2d30f5aeda9e41ee1ed28622d9. 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/ATIB32499032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d640f71cb19890b3860b057ef68c8a6c7520e6beaa6e46fc45322839da9c91. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/ATIB32499019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623a2a9a5e710f0a89c324220635144625b0dbf572c40d2031b7df9bc094c610. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:09:30Z), 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/ATIB32499021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62be74ed9cef8ab382e2fff0b8bdee30d08283bc354034f0df7368e9bf625d46. 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/ATIB32499033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea276d71d6986aadc2a5184805823aef58099f64eae013c9a106e59eb3409cb. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ATIB32499034.