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 0x3c0239a5b0810e14a01c7869676ee4d40997612a790864d6d9207a0fb6cf79e8. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63e6db9c-b922-4a0b-9ad3-62f62fae95c0.json and https://artists.proofprofile.net/proofs/artist/63e6db9c-b922-4a0b-9ad3-62f62fae95c0.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 0x21b9f49ce38b37f1070952b180d5ac334df27b28a11ea8eb6e5e1c6c5a2a133f. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZHNC2394612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9f045bf72ff83953a9531bb238b66489d5fcf370e2bb09af12946c706cc188. 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/QZMEN2322807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9b7d84444270b5c8034b153ee15479d7ae2b3015f58d73aa9977e38a9d92d4. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZTBD2356424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac7a598406554035af5c28dd57b2140e4a955dad5048048b504d5e39bd8ba66. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:03:16Z), 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/QZFYY2426472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f983c92c97da6256af3cedc094dac309825c02b09460c75f1bd7552596d7e0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWZ2442418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c19c86960a1517ae7e2ee6d410c2623df9ef8f73e08d7ceda12ac307dd4d22a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWX2498845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4063cf920c6b8a6f92a68888c43a1349f0c2c1f68574efc2d7942b970d1bc79b. 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/QZTB22497193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34bd0da5e1494ac7d38acf40307ff365308c700aabe31244bba95f4fc92a72f. 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/QZWFN2474106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2b80844678196b573b0f3627c9f79e3ad3c7b0d3e536cc0fb401e49b4ba191. 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/QZWFN2474109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa522febb6617f46a9f162f539b1c4b164cc5b9ba4555719ef71b1dbad3d2e763. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:58:41Z), 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/QZWFN2472231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ae66e9ee7fbfcc0631d37ce5d5c3a51739704feabcea06f4e368c69cc767ef. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFZ32502554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95976207fdc9f76a7a848a67bf6241e9a3eb8aa7ca7bd9c9fafd61ab954dde04. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFZ32554255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e85fc1cd00a20152a7d45c07b8208c1a016e2881065d0789382978b008a55b. 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/QZFZ32568500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb195b7ede5876f705c859d9df47fee81712e6c03c43abb0cf205c6b4f2694905. 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/QZFZ32566343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ca0e2716bd625edf5538c7223c0dc7cf7d35bcf7590609e9b6721dea28f87a. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:54:33Z), 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/QZFZ42501895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a6ecf67c912f377bf346d929dc6e1bfbbba00ad698ff3773ca9c752f76ba4f. 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/QZFZ72514965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc85e66952a7bfb6160eda21f75717b00cba80665fef194715bb3ad6c9ccf17. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:03:31Z), 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/QZES52585610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4239ff2242777e0b032885b7fddaed138e2a25e8a0e835f486efce887b2511a0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:49:11Z), 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/QZZ7L2505519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5a801600e2ca7e13dae472e34b3fa41015268c92ddc336570c7e7951a9587c. 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/QZZ7U2505034.