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 0xe3e117d26ecd716747b07ec91c86fc8c061c18cf276ca4a097e568c6e235ac63. 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/02899a9e-8f36-46f8-a8e3-9a69d775985c.json and https://artists.proofprofile.net/proofs/artist/02899a9e-8f36-46f8-a8e3-9a69d775985c.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 0x7a36830bce3b5f607e93ff7c82e8ff7d67f0498999ae21b4c1ba923078f97900. 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/TCACY1763609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1dfa93bfb1296967d2a61462e908b63e86f240b03a2b9e58f5c4e5ab3407f8. 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/TCACY1763671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75530e64d1a7c3f97e5fb515eff92c67617169ce2d0789b3e350b2477db9129e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCACY1763673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe995b64683a8bbe516141b7b625435698fc7a8c69af37926dbaf9b67d93db7aa. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/TCACY1763679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e425bff9fbde576cf1850ff9562f13aaf80919ba6bd6e6268d0c0c290c0118. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/TCACY1763724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8067e3b10dbc61787b88e33c3e2da0b943e7ad52d64bf5d228319ba9bfd6f0. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCACY1763758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11b62ecedbb3084f044148172b501d95ceed9da1f55b89a70733164f2bd6493. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAEE1940128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2722d5d726cccfce550d50554f8ef67504d23fbc68320d2d314af1ec98d45b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAEE1940145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9f7051c7920f8a9b3797d36fd384a96d53bba0d7e933819b91c15bc999c03b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAEE1940190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb102581028fdae633c4ffee510d98a24699a52c0effea6828b3c44192026f3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAFL2127956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52eb7fad21e48d0a15f7ea717fef1463972bb5a53abb9f22994b384926489a1d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAFL2127957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fca7eb01f9f0947394b7e8666655c8263c243fff37013279d4f209e959dd3d. 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/TCAFL2127960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082d0c0ae6fe8c6b8c845a60524cd6a38f499970424b62a950f300b6e43bd328. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAFL2127969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436d7e0da6d11cf113bca75eb7ed5d712cd35786e4b360cc9659bf489dbe622b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAFL2127976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2850e09a85dd41f3e2bb01a811cd4b13f9181f8b24a1fe8eaf30dcf67cf83247. 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/TCAFL2128004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89da42801f193b0e26172f6769bd2d06cfb616a57832e095ec52c8fc6204a52a. 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/TCAGG2217647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1773b4f75aa79d5583100b594273b29a948980f1a5da46a14327289d9c9f28db. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:58:46Z), 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/TCAGG2217679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7513af02a9af5045d5dd9a3c591fde1213ab59a10f4f3bf73b88618e1f2819. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAGG2221496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3063923e8f5e2077a308767bb3d77491aa814c947e6ef35236124dc87e8d9c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAGG2221628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947b0e9c79b22b8e4506b3280c545332ef9250ca5f1ef12ce13ed01a3e78945c. 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/TCAGG2221640.