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 0x1afcc2c28a6c59a29b2aae796f2f3612bd00c64320767ebc6442842705e41d32. 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/cc8c67be-d9ca-4fa1-b39a-cfa88777d8ed.json and https://artists.proofprofile.net/proofs/artist/cc8c67be-d9ca-4fa1-b39a-cfa88777d8ed.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 0xe366e847a9d0bf415c43411c5616ea1fcfa2472036621002a373111b51cce8fc. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/US3B49800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff8dd91772f49c4ebcd9ba675ca29bd00da5e3e5e86a7558553a1caf1bc867b. 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/US3B49800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b382bc76d34f9aba22e7b8d1b81c0b3f867879956e24831fb03cb071ec50f2f. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/US3B49800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a777a3fb0495df00d21a5bf8a9cf0dbe8f3b1ecf2088abcacc050c10c9629c2. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/US3B49800106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417c16dd4f47700839443691d69b6fcba0d4d6cbdf05f1b95321c3cf9420dde1. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/US3B49800108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4aab2537ef3cddedc57f5aae579aab9b1e44c5fb3f48f15ece284484b61218c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3B40000802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef39bda731a4b4a524e2a6039cac11bda0948b294c30030235be43ad1bfccc9. 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/US3B40000809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cf5b5a8fa1880500e9ae4768489e9ec1737e09a4f0044ef44c4da14ec0f627. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:04:05Z), 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/USSV10300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0776e2feff64af572f0e5b633cf240a12e1ec6ac5868f6d9271359275a7f3ad5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USVG20600050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada45b0699125c50a2cc9039fcfef9b8419a9f501e645596c7b4e8715c345613. 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/USVG20600052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2866927d94e4d5f44c1375d6c75d003b45cd6dca35b346ca1d43099ef4d6adb5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USVG20600048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa151908188235fb85e85b1985c8d4d56808eb5f6fd7a4dbfb296f07f43dcffce. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/USVG20600056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c106a1e574836976e022d5280e14664ef331785a4d5fa2620036a1c3bc2e825. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:07:33Z), 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/USVG20600057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e98c40a90765324f3a48b276691f21234ec857ce820ecd95d0ab34a80ddbc12. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/USVG20802049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b31638744e88549bd4fb13e78f0090e203b2b09819d06b977a471595afe3ac. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USVG20802050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413c25edc20900ad47f35ff5376d13325fbe46129153e1b06e33b106e515a32f. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/USVG21002550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7546042d1a83173ddaea8d3429cfd0bab5b1b506f449dd9019022e88f2c28c81. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USVG21002552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2b2386f23d73cca6d2620a1cf34eed125033b93ff322b24ac2d7f1d6ebd7ba. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:47:44Z), 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/USVG21002554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3574e8e04cc334da21a69d415b9cc9faf931744372a8e8db6352176da5d7d48d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:47:19Z), 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/USVG21002555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ba432b613935be9dd1ddf12fe437ec4e0cdb1347952b226154604af8145705. 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/USVG21002556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2442c0bd3dad0cc4cc3995b69a3d4a59d9b5738abb78537007159dc1071a648. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:08Z), 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/USVG21002558.