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 0xc57be5c6647cda3e8bde7fb768c83fc8d04b54c169e918afad919ecbf87e2479. 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/482357c5-aef3-4025-a78b-34bb63a36796.json and https://artists.proofprofile.net/proofs/artist/482357c5-aef3-4025-a78b-34bb63a36796.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 0xb67b5134667ea8f81381752374b44bb7424330680d6b51e4760197095cbd0c81. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/IL1042006201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d61205beba0328683d8fd474d4e48ff2a57d65776e2eaee73ee4e376a83d10. 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/IL1042006202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61c53b87e776c3b462af2a50718c38abc9d49b101d992f15234b2eb4760ddcd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IL1042006203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3e690e9aa172ea0169f83328fd98ff0b7a3b3131f23f18e54bee3918879b3d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/IL1042006204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c548de3c715c56b88412103fe4fa4544ebe6124cdbb99c7af8ab8fdc4f77e1e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IL1042006205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a0c79f73611a4d33d53daccb3389714975e6768cb056dbd9b0bb09ce09e270. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/IL1042006206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f59b687461e8140f2a2bba83706eb9075052703b9fe63d85db0e7965fd87ae6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/IL1042006207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41316b8915ee2e9f471aff21b01972639a1dd1322d53746dcbbdff077535259. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/IL1042006208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd443407a3430867cd55046cd8aa034dc6623d8acc887105333a90bbd109d018. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/IL1042006209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f4a05f1db77b974a6f4da7e03b33058b79ba69c8dcc6bb65d98afdefbd3b80. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/IL1042006210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff7a400c11adf4090f35710add8798550b43e601477d903935308ab43f3f0cc. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/IL1042006211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921dd9c57c5e3dba5ee524f943ce7191e4de4890f040deecb9369c401d33ccd8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/IL1042006212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1ada8753feb7eb27fbffab734b81b8695580b63c60dafa9c5298c46c132679. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/IL1042006213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90864e43e91dd7e2ae898d7666467a05b9acbf5727eb9615164bc2c3ff4cf6cb. 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/IL1042006214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f08bcbd8d88ae5c438c567f8aa6ba629ff2886d9959d063d8f37535d530def. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/IL1042006215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1686fb461dd32c158c6f37e08ae650133eaafc4ce65614568d605c78f7e13a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/IL1042006216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401253e3f29bd44cde97bb31e6f8e91fdec3e6d8f8577b065adec25fbf6f0667. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/IL1042006217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f6f604509b0ee7fa2e50628e1d4af239986767c55d813660e747f53fce7f23. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/IL1042006218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a2db875c217d5eb45a474aa301fc15d06e28b374b9bca20a11d29b2c8a324e. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/IL1042006219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b5705793b0df9da2f48d6b7bea0840d39d1a47237c202546c64f6054a03bc0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/IL1042006220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bb91bb3a39dc5fe47e7cde79d92bfd3f41dadd80b3707c17351b500eeefac6. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/IL1042006221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654a4a20b51d3b77ddd45727c4e656067f4042b5f9b5de8dce44cff580f5ebf1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IL1042006222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad06151866d7dc53e29588edefd42591a36703bcc577cd7294c42f07b1ca10ae. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/IL1042006223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6350ff2bb557bdc4029b7d73c5b1d08b948acdb4e5fe9c4cbb8ad9ed5fa439be. 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/IL6191800963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253e08747a97dce5011c891cb69a4c66cc578553bfb298687e284458781a591a. 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/IL6191800964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1244e5207c0defc68ac072d12fc0bb02c44172ede07d32216a49f33962262669. 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/IL6191800965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55587b5b8dcac83214c4ed192c0c3bd1aff8b91cb5e83336657fbbcca372dcf. 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/IL6191800966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e589edf3811a388211cd203e467a408002974056969cf25188f7086fb9c2f6. 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/IL6191800967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07df4bb0ad5ec665d84ccbd86d3368e9d5974943ee6462046005eb85519fac36. 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/IL6191800968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94803d0ef33eb89e814f93b7439a8dab4757f5f70fe6fdd07e97e232a2a2e5af. 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/IL6191400257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b31da94efbb92eecab0f5871cc872041e5b2c7cbf50d60621952ca50b983cf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IL6191400258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365f9125812b961a8f10801596e9eff7f6aae1f62921a5547ce76f0958b21025. 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/IL6191300230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a3c4f726929411127704e0cc9d7ca9969eb2a2b58d705be909494f76a24922. 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/IL6191300231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dca4aeb61973f8a89a8a747cfccb4ab5414cf580ca07aebf097c390cff8534a. 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/IL6191300232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd1b4268c8bbf16e44f83415c674e571ae00dbc225123f19082a25edb9c5eb9. 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/IL6191300233.