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 0x4b5830b1a87427ab5ee640e5611fbf19027906d53e96b1dc6b01555478206faa. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/685f6ec4-6840-41c7-9b70-ec568a462ca1.json and https://artists.proofprofile.net/proofs/artist/685f6ec4-6840-41c7-9b70-ec568a462ca1.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 0x0d7a6a09b65183cf102aa6247fbd9db79ca1c28b0892621bc693331f76969ed0. 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/QM24S1920403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98aba00c18499e1311be02abe9826f064f7d46caa92ae22955dc6cd6f331f103. 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/QM24S1920398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadb24ebdccc188f995661d0b4b2a2a12a512709102d64688de9b83aa7b6a892. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QM24S1922259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf806b9d38f91169bbd9dd80c345bf15408e0bb223deaf9e717192183f749043. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QM24S2001315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2079c78822dcfe35e716715a20c4278d6a3188506b073c8614694e34aebf94bc. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QM24S2100508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c61d5752f0ebf35af0fbcf2d8fac319c890d73083846dcca88000b6a51b759. 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/QM24S2100509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9206355996d41b154cd5df14c3ddc009a186645f9ac04d6917b51719c19af2bb. 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/QM24S2100628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb346decfc6919bad85099b25558d8ab40a4640c4c87f0d5b7e3817498b2666. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM24S2100629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c4a5d5457e22b597e274064f117613f56de777905db417e51ca4e3e2d9d3e9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:09:24Z), 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/QM24S2100631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fa599e92ace46588ac4f3a24176d9260da55e624e081cf3f69c4c4804dd20e. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QM24S1924827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa78682eb1948327e207e3ec3fb79c84e39c346c9b2b0c44423fab379d0af61f. 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/QM24S1920397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd05ed7b441aa7f7fdc38dab5d611f6af0df3a255b6e6d4ce80baa1e6108c235. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:00:21Z), 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/QM24S1923160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadb24ebdccc188f995661d0b4b2a2a12a512709102d64688de9b83aa7b6a892. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QM24S1922259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98aba00c18499e1311be02abe9826f064f7d46caa92ae22955dc6cd6f331f103. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/QM24S1920398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf806b9d38f91169bbd9dd80c345bf15408e0bb223deaf9e717192183f749043. 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/QM24S2001315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a728b5d72794f248e4e98cd6c21ce29a47a65e99818d13f0ffff48e0bb2a07b. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:31:29Z), 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/QM24S1924826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72801484ffcbb0a801f75d9c2f53df259e2e7ab1cfb7c439758ee848ba93c7f8. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:54:47Z), 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/QM24S2201162.