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 0x00bbd4270b6ccd6f9c96426f711608848873f83f0e0706659e5dededc61d0337. 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/1f5f985a-9639-4f68-be0e-34df2b6fffe9.json and https://artists.proofprofile.net/proofs/artist/1f5f985a-9639-4f68-be0e-34df2b6fffe9.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 0x2c4c899e057b4aaa00befbe63cae539f2ee2d08dd48831b16a863239bc17a946. 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/TCAET2055213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b6e4ff0258400a63acbe165297eb54187c5e159e1861717fea6698db498dc2. 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/QZTAW2345670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c0590d3aeeefcda288e4d03649c40e675dea6894443bfdcc4e56271bc00434. 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/QZDA52313054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466cd440534e9bf6ee277b93f355885a6b0b559c6c8c9e524fec6f866026ebcd. 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/QZHN32368601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55b64bc4dc3173ed1fd8d49329d6247a92df799884baf8d643156820885582c. 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/QZTAZ2265697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3028b6bbf3582fdbebbe4057a04edf932e007b88e839ab48649472e0e37137. 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/QZHN72288756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b15d6233174ac913da33066095728f9440c39a3f4d9e3d77ca6d68fc7dd43f. 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/QZDA82221671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a69d131b8d2794016245580fffda41a34545fc703e499b26ee7afbb6608a74. 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/QZNWY2103573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb28ee8394aa64002fb1561d79f74df477c0cea536600ba3f0b4b76c305ac5b. 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/QZHNC2167495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676c0bfece7cdc55aa87ddc053be02b4218d17044b089d0fc3959f81bb5c03bf. 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/QZHN72166695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ce82b907f6b8a81cb0e6e6cefd0e0ee178b9addd9d3b6dd89fb1e746e68f6d. 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/QZES82127305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f24f01f0a6a6a99534cae7ef0e962aa3a5b128b41e05b2980fa4f06ae14189. 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/QZDA82154674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebeb5bb337f869651ef80a89fbf0541fbeb5f5577c97f9a68157bf2415ffaf2. 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/TCAFK2192217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314fa48858bdd5434f86301da8e1d7d1e9188e4f210e887e947b10afdfe3cd62. 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/QZNWY2065853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e2a0e95af8f8d32bc6cb47f24d746f9a6a2a3f4ffc2597afb7e5325a091e37. 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/TCAFA2053598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf93c6a413f87d0f1ca165c7bc1a499956ddc3df222e2e7b9df395f369d4862. 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/TCAEU2035974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9305472abe8e2f7e154860168ac95b84f63705a4c0b595b0479224eefbba00f. 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/TCAES2033287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd39780533c56fc738aaec1cfb484d951099d389fbea2c91e2dff4484187eeab. 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/TCAEN1949276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51748e2c536d5655da2a82c421c26f333a8f1679fdb1ad836f72b55237620191. 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/TCAEK1954337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee83dee18c7df58625d68626c7afeffb903acc7c6e0558f6a355826b8125dcb2. 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/TCAEF1931664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbedc70371515f3958078b4ec9af4aa3156965950ba757989b2276d0a04530b7. 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/TCADZ1802749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749746a03095b911f9996f021e4268a21e11ae42215c7f2979b80979b4b33446. 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/TCADU1867206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6f42a2e21389caf440e852b567be1d15e2c681c9e70f9841a96589a6c2b593. 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/SE5752363464.