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 0xae4d121ae0ff52f60b53b0cf2ef35d41fd26745590c8c3ba5a91f5a85490f6f1. 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/5fe7c316-3d18-4dae-b1e2-5e425c5c314a.json and https://artists.proofprofile.net/proofs/artist/5fe7c316-3d18-4dae-b1e2-5e425c5c314a.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 0x56a1ac9d3ddb3008cfca5bca47ef4722ac9d76dc4e3c32e1078286dac7458079. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZNW72330158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb2aab3d8f0219686c622be515382e038a5ad0d05c915e74bbf10e1845d9e35. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZNW72330160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8414d093374669009ac9240a648d496f82ab00a7811f3f1d819a9859c143743. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNW72330162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69386c69fd84f665c73c0f9c45e3355b08b7d44a236e9c2b4f5493de6cf98a3a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:05:19Z), 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/QZNW72330165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1f2554f85ae81329f55abdfa9050f075808935f16964bbdf88400c5bafe08f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:05:15Z), 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/QZNW72330167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b57d4a5f3d5999b007d67e61dafe427525f55f7e5ef69c1ab5417bf706350a1. 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/QZNW72330168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680f4e5123ee6e8840353beac26813ff6ebaf5c8729225fcddda9647546daf9f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:51:39Z), 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/QZNJW2454338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb61d6a46e611903df057bf527050265ef84c3c1a40c4b558da740e0373d8d1b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNJW2454340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84db430d494fcd2f3fd758493f82a856c72ac0b609ecb869304d6bd307e3f723. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZNJW2454341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a97ee90fb1a231ea630a2baffa8eb352c6a0b1f015a0f8f1048a7e4400a803. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZNJW2454344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fcd79275d6844fa67c5e3c1b6ed5ed1d3a95a981e5a7dd0a7520615d721ea2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FXR752405121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c8358b1503cb822abe70c57df9d6f744e0d0ac91f96cc950e1e1598d0ae763. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/FXR752405122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680f4e5123ee6e8840353beac26813ff6ebaf5c8729225fcddda9647546daf9f. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:31:09Z), 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/QZNJW2454338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a97ee90fb1a231ea630a2baffa8eb352c6a0b1f015a0f8f1048a7e4400a803. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZNJW2454344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce1939f6e073c18415f89bbf9699a70c95b56ea4905da904d3614275a0d8d4a. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZN882591097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ec0066b361d30dd199c9dfa0b77f6b22db18b5afa19a4ba3988a43d249a9e1. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:44:52Z), 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/GBLFP2572563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb3c7d8079fb529e68ce8883151ffddd6ff2ceb3e54af7bca4cb36971e7cba5. 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/GXH2J2506228.