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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bafe51cda698cd592f10d3e5bd80ce9d315c46772d5d7bc4735e699ccbc6164. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/365bdfc0-9072-4441-9a2a-d0847436e1a4.json and https://artists.proofprofile.net/proofs/artist/365bdfc0-9072-4441-9a2a-d0847436e1a4.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53048d1346e4c86ba4f60b33ce9f8ab30d003540e738f7acc1f3bccac349dfe0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR8EP2301140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc73f4157d022ec392c7d232f8c367738db539c4f36b34cde0ba90024b93d96. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR8EP2301150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cf2b6a91e8d94a33d22f3c0af19dd6eb215c464f1bf02152f089c2d91c117f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR8EP2301170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef01b2965735bf473e057c124bfc83b0d0518b5f334d7820514b046e5301f57a. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZK6L2217862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69db47dde24cadd01c862e5de6bc05018b0b2a24e8e04b15ccec6015fc89a51c. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/QZK6Q2220140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dda3c4b93760090183a1e56e08b6cd61a50af09acee00b9cf9c43d3eb0a1cb3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHN92229013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03b7b7ce17d635c21e816f3d170a9e241cf3a583f4a37d891abc648f74fc9dd. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZK6H2298243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4fae858f9ea9b9ff79f9db63d094820494b4d2c3a5cf8385139454d957edbf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6H2298244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6c0a1f7c5f9073314ff2ae4ee952008a599eac4ca8434c9af752ac8aa6eeec. 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/QZK6H2298245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a630726fa6fabe5483425da46cdecabf6c22e480f6d493ab1bdc3e0b6ac27b. 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/QZHNC2111064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3822d385168027f5587515e32812a116a27febdf7b490221148fd379e563f02. 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/QZHNC2111065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd942216d3f4f80fa1bbc6314f221df1e7ee0923372cf02f0df55b5ea61c206ea. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZHNC2111066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef537b7a66bd4b49dfa087f1ed3851727016111d1dd586e70d8563d0baaf17e6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USHM92484918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dda3c4b93760090183a1e56e08b6cd61a50af09acee00b9cf9c43d3eb0a1cb3. 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/QZHN92229013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc30e4df84e72b3ccb21ca3dc736b76870f4afec5101aa0d923008d1cc796fa7. 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/TR2201404972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69db47dde24cadd01c862e5de6bc05018b0b2a24e8e04b15ccec6015fc89a51c. 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/QZK6Q2220140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b23765e612b7a16f463b28fe288dbac85227a9201e2d119f2bc690d11e179a7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TR0281906183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba582f927f80019fc6e90f8b154dfd716512a91698982168aa8b61f3d53c285. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CH2172203301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef01b2965735bf473e057c124bfc83b0d0518b5f334d7820514b046e5301f57a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZK6L2217862.
East n Blues (Yiannis Kassetas New York Sessions Presents)