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 0xeb685381dfffa429db8b9b24dfadfb7bc70f03a9be228ea767103167914dd709. 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/9c6f83bd-66b5-4526-acd4-9f34a04bd9df.json and https://artists.proofprofile.net/proofs/artist/9c6f83bd-66b5-4526-acd4-9f34a04bd9df.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 0x40ed75487efc6e578f25540ab2d6c0390ac212ca966c2b6212097c3344da9c46. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USQY51741981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc741622d8a6009f5c8ac7bc00601148be21f8e11587a16e2fc27e37ff58ac033. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:56:01Z), 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/USQY51782504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132826bfd726be8da1dc0385b40312298518550601d4cc9644efb59a498b8fbb. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USA2P1800934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9dd98aefb82187e54609b4f8abc556240429a9ee07b04420009e87fb72f506. 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/USA2P1806430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027d2561f1d0bcf8ddd7b13ab286c6c8089780802ad7129972f4cf5b0ce76e33. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USA2P1827153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dcf88c0fb4a30cc339578c0964a108cf6ff646ff2594b22612fe90431bc90f. 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/USA2P1885683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c3ecfd86c0b1652e94e9a1719abb04c04e4a88e871ae00946b48cd097e7a64. 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/USA2P1885682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29acb502f8c8dea61cf9c5feca7d75906bd648068ee61daebe7457e778684b9. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:55:19Z), 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/USQY51797148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02806698ffe86609d6c31660f47f5bb86f2da77f9e709d678fc7103d81a88feb. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/USA2P1901066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2e513d5b92394323169ee2e44297b37e26e763023a1292500c9f7faadf769d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USA2P1910539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58fabb3dc73445b2bebfbe312c4fd1c83e84feecabf7c401c1c97fa55400660. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USA2P1923449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b30acf8ad4030183ed30e515e428d3b8214a5764ea7ca84ee7304a0e5defae4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USA2P1928806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5c7927d8394869e94708bc6cdc84e85b9b92ca0d21229d131fe790959fdb8d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USA2P1937043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36fb9bc06945d6dd8e96465a76a4b58651c9d256eec7799e102543691deb963. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USA2P1949059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58fabb3dc73445b2bebfbe312c4fd1c83e84feecabf7c401c1c97fa55400660. 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/USA2P1923449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36fb9bc06945d6dd8e96465a76a4b58651c9d256eec7799e102543691deb963. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USA2P1949059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2151ad3745cee5d6528dc4d14a12b6ced4967ab1e4578a6234949a928e550d81. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USA2P2246557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc969eb8b3ada0deb02422fd307cf5d7ff2e6de4384c0e4e2a733e7990d002b9. 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/USA2P2309144.