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 0x2c100669e7ac4d9d1325d6d549bee11304487fef2e580eb7851082e655b1b22d. 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/dcb76c12-8da9-4581-bedf-c25896303bb7.json and https://artists.proofprofile.net/proofs/artist/dcb76c12-8da9-4581-bedf-c25896303bb7.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 0x12aa6dd0b5e04a2a9727d3558eea209c4176a5161bc1229e3d11cb98dfaa2750. 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/QZF8N2152218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330975650bf260c422aff45f77af588f677b34872c346f1dc6c7afe3f06084a2. 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/QZNN32159537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc7c75553937ae944772451d620cadb20b1300a649a9b22d79564cdba70a777. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNMW2180116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca1bc06fc1dd416a6ce4cb73f46871e0f04fd90f721fa4e63942f56b29bf38d. 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/QZNMX2143715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75feee7a75c15e06b7b3ae1f6e5fcd62042d70004a5e2fa6fabddd32c833f2aa. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:16:41Z), 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/QZNMY2180388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995b7520a49565ec1a2c30ffd88168624be6d4af0f31cce60c33be6860380cc0. 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/QZK6H2237733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5944c92e929b84cb3356ad9b087ada78c54478844cd7c7d89f2ca7858b8a83cf. 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/QZNWZ2260263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200610b0b9f29265970e9ec7b82b8a873516b0412f25aad126e10390eb9202e0. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZNWZ2260270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385baaf680c7889deb57f24308347c062f5736c62a0f7e57641ca3985082bc4c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTB82299937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5549cbcbb558ed6f09bd1f815914856aa2a54365cb8268957781ce3fa4e1b59b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTB82299939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c592e90ebf5b5b198f54edb94512401d48213682c85dd33d790028eb183d23. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZTB82299940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd739b3b1d340c4a69968c80c0c02ad230aafa4d19e8053fef087af1d06bd6b28. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTB82299941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc564c4160453e7893ab496c0f4232da0a4f1d1c46de4d53e9294efb95208bbe1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB82299947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e38d45037e2d927950fcd8b3684e21aa1c66c5ca68917643e07fdb656356d8. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNB82324452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9836c329338755109620a02b674d11539bce4f690fe1525b309c1c503cc54719. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:23:54Z), 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/USLD91753654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01413b9cd46cb0b5b2a1917f33640b2232398d129ab00d097104663e61fea87c. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:01:04Z), 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/USLD91753655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b5b1726e12f373c007a74da90f0df7b1da1c04331e09832d43d4713b4ceec7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USLD91753657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea55e655954dcfe71852ea505747e831fab253e1f60ba5dce4d7a420daaeeca. 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/USLD91753658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacca050772e86f98c2022780ea7f7d32db3847f1f8b3961e2bb8f6dc95089bd3. 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/USLD91753661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3758dcbdcd5c9690076b7cc648fe9a7c963ef3a0ceaa6eeee589b76366b069c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USLD91753665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f520e317b951de1dd228feeec4486a5273e559a03da00da8e38600dab993e5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHN32302861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91ffe543a076e44c84636ec1716cd0ab9a6df04f4099651de5f96ed55c542e9. 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/USLD91770752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06b0cef5d6ffe4a949d6c472a34eed047beefa0ee2522ece081c995feb7d703. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLD91770755.