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 0xa6b705ab860c8b8de8ceb1e4ea8e22b3f07558db67ab357a794d7907e78f894d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28d57cec-fe06-4020-879a-3816113c5dbd.json and https://artists.proofprofile.net/proofs/artist/28d57cec-fe06-4020-879a-3816113c5dbd.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 0xf8c6a1957e2c724124a96cd6b46fdace4059a63fc1e383cfaf276d830f747090. 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/BK4DA2320710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b371127a6ac377d7f8e213cd73656b1ebb9bb2f206244b69463d85d01f2a595. 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/BK4DA2320711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b15b6099bdd8ee64577b0202270742f3dd96f156b94bcb4c83899e494f6664. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDQH2273708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fd47f165c1ee9ca6aedafc8174367e078b8075796e15518b84699d5d2c0508. 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/BK4DA2407541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd8bcdb7c3370e4fcd0c5086dae0f83edbbacf20ffdb585a54fe4b73cd283ee. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BK4DA2407540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf740add29f25685809011c00ad030b87236a34d84f0d19158d1c64b79f524751. 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/BK4DA2407539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8668a4d886722e0c1ee4fc5ffeaddf9da37b6eae104812d3623ea9381ebb61. 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/BK4DA2407534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146a3446c28f74543d42e0c3f434e22584ea2b809738264746e0367d7c1f07bd. 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/BK4DA2407535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27eff5434b23856409208d1c07d6451cc01dfd9a3d1187c1c17428414275934e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BK4DA2407536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911f7b8a69bf8b0622f0ff20c12b291dc451fd7d803d221b0f6c113cb8a59217. 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/BK4DA2407537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9620431134ce968fcbb3ca9d9d554323a84de4f1b83136528addce8aaa6dc5d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2407538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b7c14fd026184e4dec57763beca056f1c047a2d5b69e13d851daf900bf8103. 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/USA2P2244748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d7daee5dbb2c2fed6e130c11b0da68f24a67cec8bf3d282139f972b9ec18dc. 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/BK4DA2415175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa58c14b4986656feb64f2352575caba01f7a4a780273818f9c2fea6cb1e2ae0. 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/BK4DA2417234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec9aeddfeaa4151530bcd5603e02aa535ffe656bf05290b9d4de3c72114e555. 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/BK4DA2408511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc675dc563aa91214af0623afdc54013e56d39f669d971193c45e95f693b96f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BK4DA2402001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06232bdeacdf35dac7213f099cf46931b628b4b1d404c397da5e191071915fa. 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/BK4DA2326437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd68d9283990bc398649ee5c6235e28534b03cf57ac2844a0f4c9aa7e5c2b38c. 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/USA2P2244420.