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 0xef6791be0d418fc15f5f72f35c5f5fe9c853ed9b026558dbffeafbceb416014b. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8da666a2-2413-4e9f-a7db-eea03b89fc49.json and https://artists.proofprofile.net/proofs/artist/8da666a2-2413-4e9f-a7db-eea03b89fc49.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 0x0cc0377c230dfecc14c6fd64304ca3db987fb68692868d34583f6e251aad38c2. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/CALVP2506881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd775685103de9a5508273ca11962d9464080e138ce09d389a5ec9623f2e19d7. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/CAGOO2584221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f72b2e990d11c99c625005d8cc529e282d161c39a77b1926de4d9f1b2d20bf. 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/CAGOO2584224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7299549bb997aad3615e7da328233f07ee00de6654f01bd7826e7a74e2f79c13. 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/CAGOO2584223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb086809e432824790ced5b9710861f6a1f7a79c9339686cbb42d95b81b09d1cf. 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/CAGOO2585160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb2dbd3616fe5b2db9e7990dfbe831fedde833909b3f1f38ef58a363ff5c277. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CAGOO2585158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4cd0ac96714c6297f25b70f7090b9b676326ac92c0b998b1f6500db6437d03. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CAGOO2585162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1975224a1c14bd7a0623dc4dbc9155c705b81f522f70133fa1b629dce4075bfd. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/CAGOO2587009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5da3baea5ee88cf8352137048bab007cd7b198cd347d3997cb39bcdcf9912e6. 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/CAGOO2587528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5966a78cf9674c0e8aa0f5f7e0009b5dd5ac013605953c0c7e69f7422798b193. 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/CAGOO2588752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe100378e4241e28773d46e1ee1d05777002e31099f589a4c5c12426bf5576af5. 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/CAGOO2588749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e38a382eb6ef5d8c36b069b94a0ae10ac04f8550cf985a660898858b9ebad5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CAGOO2590506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff05cd76887ae82959af4a1eff2b0d366b515cc446370ed7afa5c7f9f49615ce. 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/CAGOO2598347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752ea7169a35a10e0c37d787854cac58651e0f630fc7d15c93af9d9887d5911d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CALVP2506890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e81174a3ef699e3ceea7511ff98d60f0161676d2eace43265df8166ffc7bab. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CALVP2510751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf7b88655ceca07bb3f4685332c40311283ac340d6b2dc6456e190d315958fb. 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/CALVP2510764.