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 0x3a3be77e72f47d521c0f0a7558e81561bb14e26333118d9f11d6e8bcd47a0c6d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8059d56-14af-4fc9-8860-104469c0053f.json and https://artists.proofprofile.net/proofs/artist/c8059d56-14af-4fc9-8860-104469c0053f.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 0xb225dd6af0ba5b633997ee3b683311f773b40aeda03046392c4d35d5cf361068. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6L2348521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc0b767dbecb2654bb6dbc98fd2f826283f2de516102000c037198817534988. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZTB42231738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8091e5aa0e889c61d41e34d9379ebd2b9f8a60825a8831e56a9b66c378fe56dc. 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/QZTAU2243533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2900e76079dd03b47359e263a5dcb1e648f5fbc9239ee097b093a4dddae5dbc5. 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/QZMEM2256551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb630366ac10310b92f457cc04596adcee46e869eabe52435438353edceec53f9. 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/QZK6Q2209503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe002fd5a85a90a9eae8b7e476168ffc51e711f80149c1b31cf100c2885a2ef82. 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/QZES62258721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344b615464528e47d646a202d2484565c79989a0735d57566dae805d124356b4. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZPLR2132080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe6ec33a4e51ec5b2cda45a7c581e431bb9e93e5bd24bae8458701d15848e15. 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/QZMER2184698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d4f1e355102b56a70ee0cc0081eb3d2758a4128f1369e0aafb14815d5c72ff. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6Q2191900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40962de1057862d0eebb50ed33c34394c9075aedc77c8079dabd389ca0108391. 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/QZHNA2103118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99b717077c130b850350b82c0920b0a1ad399d487d72b274783a2218466233b. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZHN52102481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb616d8f67af514af92d19f1f4f4928c3a541f499a8cf14ac78a47d75e65d3d45. 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/USSM12101826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf185612355a07e9caca9014a9e86e16a08a9c8292c7c20c5dcdc3d51c892a30. 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/USSM12101314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b2695e0fe7485bb5b0f40fcf107340b2568cf660394f1ae1896f3c0bfd8884. 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/USSM12100356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1de455b6c07250a1d779b24d765fee5a214f494cc8f04a23996a354dfde5c4c. 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/USSM12100759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70de15ed22d741655cbcbd23b5e8054aa1d32c829d90027ab3c747b1e3a828e6. 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/QZK6G2148675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1de455b6c07250a1d779b24d765fee5a214f494cc8f04a23996a354dfde5c4c. 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/USSM12100759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58035c5a86c5a6e231de832d5092a0a92a54df06912b8fa7ddf82990b3db3757. 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/QZMEP2038545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b2695e0fe7485bb5b0f40fcf107340b2568cf660394f1ae1896f3c0bfd8884. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSM12100356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5f3a4954e57b69c8bcd558cf72722f712aba51ba9c07e56c40338839436284. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZDA42004548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b6c8f495c82094abcbe7247df603dd832157835ae9d50c048f2e28d877615e. 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/QZK6L2483816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c295d88199871811b4a88508fb9f38ce6f63599c1b240abbea1636f5bcbed5e. 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/QZS662175364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfc01bb86e6bbb515f5c20c5db3b9933285bf598177b8f011353043e49574b2. 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/QZHN32215694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dac3d2c667c70757cb9d56a65db668b081c90f469d4b74a2676986b8c88e8c7. 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/QZHN32215695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66319530556dff0ad7b277efff29c2b48c95746218d0a458cd319a9a3efabcf. 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/QZHN32215696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26e86dd2883ed5ef486808c9aa2d6f0962a7fe262a91c9f53431d270330e87e. 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/QZDA52283501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4640ae21115dd1273bfb67006799c054e583463d45a98f32922b067d2489442. 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/QZPLR2285003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ea85c158e99d9a261b5f70b2a7467aa4ccb1b1dc92478b43c7f478625158d5. 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/QZFZ62258491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d61d25270a9ad8a3a817e94e2274e3621354e835a65099cff8d006aa2a9253. 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/QZS652116315.