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 0x48605757d3bc45d363420418117dfe42de8bf5d78dbc62abb67d5500ef1b0a53. 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/ad0b7b35-d25d-48c6-a16e-1eef49c195f5.json and https://artists.proofprofile.net/proofs/artist/ad0b7b35-d25d-48c6-a16e-1eef49c195f5.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 0xc64c4613bd24e05a01f6975f5fe034306e2bc76bc79cd1e372f86298c6ca86b5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USDY42030730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa032bf5f0e266af41962144615d79d6824b2b368e884507b22bd27372e07a153. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:11:22Z), 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/USDY42030733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68bb4c50bb7f2ce7568f77691d2e735092c97c166714e2dbcb908e9a837a6ac. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:39:32Z), 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/USDY42030734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc255fb4dc246eef8628183079477e474cc12ad4c8d6a9a2ca2a5fdf15b0a9a66. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/USDY42068647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bef4c84ff677c0b626f90a9979ccde40c177fdb4964b81e7d6244d3dfc3dc6. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/USDY42068652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024b3e452428ef2c64ffb815f33f8edfc18e0926a8c596a449cfc4067497ed8d. 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/USDY42068653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4040b541d8aa2f97948c678ff08b23cebf751f7512148995dce96983f27dbc. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:57:35Z), 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/USHM82045437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa943ce7e58e0a4ef2e71840c22f3b9485744a12d764a67cb309f5604e976aed0. 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/USHM82045439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdded6bd45d7cc06812319af853cc1530dfc67ae3e81bd379fe6de27cba77ed60. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/USHM82045443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b650b8c30e113a7ffc2b83a8c894a891881921c3ddaecb1daa2b6628902c40. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:34:50Z), 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/USHM82045444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad80f02377481e326e607107a9b7a6722190c117829e8dd5800045a029fbaf8b. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:01:44Z), 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/USHM82045445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eae29f06499fef4f5567d48dd2937a26f8fe01bcfa38904264d4ae52021bb32. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:01:53Z), 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/USDHM1415308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a3fad729737ae59c6e9f372c6bcacf282163ba18462c362eb2af04bc43b43f. 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/USDHM1415312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c493fe730cc22f4f2db66f69f25d387fee7472f84d1951bffcfedb03ce4294. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:25:17Z), 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/USDHM1415313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f77b1d081a172186cd9a363ae3dcd41c9125ff0eb9f6d2d4489b62e07f576f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USDHM1415316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964bf37f44bc810d8087992320aa462c6490e8687a70636f1d6bb87e9a2e4dd6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USDHM1415318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73da128657a47c31b7a482a85289b90aa269f41da5d396604b5c91ffe7878f63. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USDHM1415319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2290d51e3c6de72c530c9bc0c3b3221e8ad13a2448a24680432805f6d74443ae. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHM92275264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67191c1f7befbd27952645ceaa12a0cbc74bf026a7ea966a6edd6069f5613713. 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/USHM22041707.