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 0x1e18d20ed7f7f454c44493ec31702331f19aa587960a43e4d82ac6a0aa8fd900. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30225c81-2668-42c7-b34b-523a663198bb.json and https://artists.proofprofile.net/proofs/artist/30225c81-2668-42c7-b34b-523a663198bb.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 0x272d762618eb8b462fb5114d047f5dc9ed27680e95f375af5775e09824fea425. 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/QZTAX2336702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ee53b65fd6ee995ac18bc9ad0832ea9dadb01cdd198ae8f1f6c11d8a61dff0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTB72353483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9e6ec28cede50744f9d42bf240c740f16285b81bb2a1b5680f8601f5ed4828. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZQAY2432288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114197ef9a5c9f184028d05909ba3e38ff87988cbe841ce027455bd2dbbaf711. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTBD2435257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5f4c90414e8a82c52d0256677a60f71104399f9106bfc1b951a136544e3a69. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFJ2435406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72868180c77553ded7a9ba6fc68ad3d622218036e5861181dc796b3c01f62f35. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:09:38Z), 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/QZWFR2438986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736b68a93faacca291767a0082be9e33f59e4bba1c1ece85d65693ba5e6d20b3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFW2433343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ef4bccc10bb370f38a017fc75da6f81937f722757feafb15990ba137e7e834. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:24:00Z), 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/QZZ7M2420435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01507685e45aff720d38b77bcb6546bff3684c27f5d03304295689744dc8a2bc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7R2494965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c038aa5ea30d3d6af5f16c1f2fb169db144105f93044ec2b13d5f4efb37fba5. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:19:59Z), 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/QZZ7W2466449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0387bd3121ae95a9ea629024d9962a4aa298d59dd8c6166b78878a1a0df78ae5. 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/QT3EY2484030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93678db8983bc4d8aa05f6b280925d9c32e4e7bfb5ed326156a384c2f1325a22. 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/QZFYZ2541688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85100376e019963054dcacab75ed908c2789f9c3591581d1f0d383a870cdf246. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QM4TX2588229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfa26efef99dffc78aef6c29e3def959aae9ae399e843fc4365050679753753. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTB62506805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2add8c9977764ad102cd9275df594d591864a55f16237e9bd5e8c8677967646a. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFK2527281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cce0b3c1ca3db059b11b77df35b50ccc668533a5811ff0241954f6090a3a35. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZTAT2520472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82606cbc0b305a05e9c7827334c4934d120a9eab8f31e8be4ce10bb56e01528. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFK2527283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33cd519bfc0d9ba5eeac365460d0abf954e8deb353fc8ce5514261ebd557f46. 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/QZTBC2516088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9ff44d0918da50316ddad5f3cfe701be8fb22710d807fa159e18e6c3b60de3. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZTBE2538908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1839aa4b53444317e0dc0f15d3b4d00caf894be6eb59964a1a356fc437b4ca7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFK2527284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3599776e8137131f323b2cb0687be0f2adca007efad49107c234ca21b51606. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTB92510528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190f748305d850ba954616a711162aec53dacaeadcdb09846615732a63311e8c. 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/QZQAY2517536.