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 0x238d112f850b45589f6b3bc0c0cbfb1e0d565d44278c1c4f83c2b04d2d42a7ba. 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/f47a2df4-6ecc-4e45-9874-d6022fba1f98.json and https://artists.proofprofile.net/proofs/artist/f47a2df4-6ecc-4e45-9874-d6022fba1f98.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 0x0c6491eedba5bd4363408ef2387d6d5b99e05fe06cc701062bf4fc40030b0bf0. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/US43C1617011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562ba8ed39e54a3fce79738672db3f4021b0ce6a8c9a3e3013f2e2b9956e2d4d. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/US43C1617029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf132d94f5145b042106085246eb4f78b076c79854c93b502611d88bfa20db088. 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/US43C1617017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7532d8e775c5821dd03c856e42a0c61347382b7b1555d41254c4515042f3d2. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/US43C1617026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948bafe1634768e2aac7b493c9872ca6db0255375f2d0ea5bf73f06d3fc063fa. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/US43C1617014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21851ed5b7c39c8a84be45e74e8f9b183a50d03d1079eca25bbe10666ead6a9c. 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/US43C1616993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aaa1e0bee1e709a400c33ef25eafb03554677820503b4233af10556dbfe46b1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US43C1616996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20809c638e37b6e120c85f4dc51ee854570576fb3983b827f638c611e83f3abd. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/US43C1620935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ccfa14c33e0f410ef24aa78b3e9969e9b8e28dcf4e534fc2d337126147d867. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/US43C1620937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ee525663ddc59f3781d59c79400985172dc4abe8628a607f57c5584080cfa0. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/US43C1626113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029e61640e88621105b65b5da2ada4e4b627cf603e16b912529bce95f3824401. 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/US43C1626116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5913ec9d0ced75903eb1c1da01f97f58aeb41532cff494289583c4a59f6cccf2. 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/US43C1626107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708d49403ed61b8ad45b437d35ed745e721a60ce1b998c9f1e908f0b070c81ea. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US43C1626110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3e51d058c7e5085ed5ebfd5e6a8bd73c4e28a77df40ccea17441b9d20041a9. 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/US43C1626919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7774b958252addb721c1dd2b49224641b875ac24118e82c1322f9b539fdad476. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:43:15Z), 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/US43C1626922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6e5ddc2b7b323f819aac54ebca65ca583097361f73cbaa938b2e255ce94978. 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/US43C1626513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf015d24dc7ef00d136c4ab41311bcff0a3fd5c13ea5e53757abc5f528d75a660. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/US43C1626925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942f2140839442add7e2359376b5f658c76c451170213de230ec698965b8dcf7. 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/US43C1626931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bb2916ee5b089560ffab3db2bbdff20c46cb314cf045c1165bb50ba4287695. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/US43C1626913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e720893451345ebefc4aaf49279b8388958c396ab77a0d816878400128af8c5. 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/US43C1626916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9de00b74a1f1503bc50d87d2f4a7abe803b296c0fe1f91e4cdccd24862d2e7. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/US43C1631824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dbec08b063aad6c31348638c1f41e1ded9828214c88b2ed289b1778d13dce6. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USA2P2419715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751c02bf553e2f74e4c30d6f815b88d2c081c3142fe3ac1e033a2656066f1aa2. 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/USA2P2419716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd099996ac474c80cd202a1f700f8f4b7ebb4d4dbc11dc8f0990a4cb8c4d8ff74. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USA2P2419717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9baa1c49bf45043ec495728e0ce6f9b7df8ce979756bd9d96a97a4f0e8e6514. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USA2P2419718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4525146d1e50edc62a725903b3a2bd3e4c1c42f17fb1559555806ba8b3ed2078. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2P2419719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b156cdfe9d304a88b0e20485274ffb2e81f7ba62544e0799389f61edad3cb3. 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/USA2P2419720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b52d102ccf1d4a232c8d3ac7eeff6ec38b2e0321b20b75ef521d6521196436. 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/USA2P2419721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed06eb3ee26a6ffa7d76799a789d944e88a9c931fda9abf9cabccf96de194551. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:25:26Z), 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/USA2P2471320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe368549f96a5ea462875f84d6498789bc90db269cda78c5a429b74378feaa4. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:01:08Z), 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/USA2P2471321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4305efbe4b0df7d13eeb76811a711045a62c51da6ec48c82d8e5636859bc480. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:52:31Z), 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/USA2P2471323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4387ed9488585b4689a3dab4fc8afbc4371f242ea11a5404b8449841fca44666. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USA2P2471324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a31546f9c9f7471f5eb716b56cfc709234f917fec9d371c2deea665800a8078. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2P2471326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb0bade98dddb8d19a85126ebff81900de4db57c24c4ff1852ea9ac133e6caf. 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/USA2P2471327.