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 0xdc6f3662d49deec2b6ddb5d966f0cf5882ef91181f5af3c1f10eefb97f425e96. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef9d9901-9f59-425c-9d37-7194240c2aad.json and https://artists.proofprofile.net/proofs/artist/ef9d9901-9f59-425c-9d37-7194240c2aad.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 0x4b74864e5edeb320bc0611674da740ef61c8f581b22494d353ab7c6825cef0f9. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GX8KD2562856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9f4547041134969721c54e49c94f40fb31e3179ee3352a280acd84007e895e. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/GX8KD2584895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d17e1754f3cc4b4b6a1dfd9717f66a38dcdbf43cbbbc051ab4705f5b2c5537. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/GX8LE2540367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43043192b02000de2e68a60d1eaf1b3e915b31fdc79ec5b76058fb23cdfe96b2. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GX8LE2588395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcbf6666a2f929254ad737f0682e4261e6b57f772bf16b338be04c81cfec632. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GX8LE2592393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968577b31abe73350ba5760bf3a4f548ab6602020782b796dfebd3940a5c3bd5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GX8LE2570632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8de1d56d0dd36da10dd94e85c54c4e1d82f35d71e0034a8cda4cb9ddb3472b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GX8LE2579724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7f5682499ff5ef6001e8ffa589eb056e6cdcd57fd4f6cb8dd4639aed350d64. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GX8LE2583102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044f540c505a17bcb6343a5115b59cf782ab2f1135c8650b22efdf6264657e99. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GX8LE2579615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d26fe4c49b82b7079790aaffd8aba47bf2a6dcff1957e9a79d8dec9fb09ebb7. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/GX8LE2565597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdce8e68dedd7b44aca229a36407a7acb17675719a0ae529b2a86f2692b2d273. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GX8LE2500418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1572b04bb0ecd8f1b662ce818a42dcdca8f0f56d31e2fee78be1ca78edfe22d. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/GX8LE2571598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a322e904be644243852fd35b5ad02af9957a4be9d351b2e089002bd63af451. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ESA012572710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be1f7ae054e8aae736cd54d89358ef639bf9ccbb929f29cf0540696641e40bf. 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/ESA012572711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391b6bddaa23f78e9ecc550786563e28b298e84a6be1e6435e0b14febaa9d8d4. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ESA012572712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb953f10a774de4b8e2183b22923f9ae5da83f1a56c69fe219a8a94e66e96c3ef. 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/ESA012572713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a49984016bb56963619eb8780d32d8e49cbd9725f73c11db5e16a173b494f14. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ESA012572714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cbbc3170daf8a5f200a89aa66e9c7964d19320bd97a1258b0bab4a8c1ea117. 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/GXFHP2563925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee58c29ad119cd0e551925d999f6f1048ae6e785c9e209ed0b7d101e90392cc. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GXFHP2517165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0f553e57fa6385cf30b7020c94b941e49518e49354090e7f0333a03562a498. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/GXFHP2523739.