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 0xc6fbfd3975e74f1aa4869d562c85b164e40918cbe679d55f815a7d50c899947c. 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/f6933536-6f24-4a2c-885e-a87e419c2f67.json and https://artists.proofprofile.net/proofs/artist/f6933536-6f24-4a2c-885e-a87e419c2f67.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 0xfb1b18f9505f7cc2bc570830b9528d271162bda759fade370956eeb51715a2e9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCADG1731649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752a1b3aaf570d3e355adbc2b540609449a5267d4ecf76575ffd15a57b7bad18. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TCADG1731651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404c8356a40904a2162d497366ad5c7f7eda822db7899db1329e0d59c6124687. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:29:40Z), 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/TCADG1731655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f32402c4aa9d77bc89291ce543b5c1607e5b2103df0700c5edb2ac8f4310878. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCADG1731656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812e12cdbd92c6b9b90b9b324b69423b977a57f46268eb466260ea3a2de2b0b6. 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/TCADG1731659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7f11795832a1540673ca51ad5087cf9077afedd78f726e0a636028af21c239. 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/TCADG1731664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8cad2ef2cc3b996020e0f9c5d663351dc5c81481d1b1ccbb4da7c4831c7da0. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/TCADG1731669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05c2029c9d7b42aa7cb91de528bb801278206b1232e00943c0a0406d69becdf. 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/TCADG1731671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280f3fc33612c4be741483f6dedc344466348915a3f6dd48ebc69e61549ca2a4. 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/QZHZ62197510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8006d76acfc7898b7a047c596d65ac5a41204e4e262acb7f983113215638b7. 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/QZHZ62197511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3366233f105e10da1cc80a5265b070542dca05319fbd9de3498f96accfaec400. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHZ62197512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ac649b71e7496d1ece9d5879a0ca8cbc3c658b6dd0a8eb7fd15596fcdd4d36. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZHZ62197513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb390c3a21eb185f8e0eac19906d41dbac31a2f554fadb4bdcc9adebdc60e0335. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:37:32Z), 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/QZHZ62197515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50824befad261cc14fb1137cddf93c2c22a8af6abe2e75700fc554eceb757146. 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/QZHZ62197516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91110994e35a6b21de4a14c4867d1933e8c0682cbbafbce33ad36fc70755baf3. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZHZ62197517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d04f9b29da015de3c57d18dcea6461fa7dd8c1431d4c12b234ec096173aaaad. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHZ62197518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84e7c1ea1e9f89ad9b0bc36c08cacd93edfc6f5f74ce7686eabe1d524e09b11. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHZ62197519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28039effc4ac3d96ba752e7c12987d1732001a5cb1b56a068191538381155b0. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:49:58Z), 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/QZHZ62197520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3168e3058df08e2176d13e5be4d2c89653e18275ef48bf4c6c2d1fb6a51c1120. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHZ62197522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a480124684f0ae33c814d5ba3f58b3f714720b4d9b9217e0cbfacd2f81eec44. 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/QZHZ62197523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70393e090967f26add1a1f2f34bdf96f1e8fbc0e581e2ea9ee94e67022d49b8d. 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/QZFYW2079276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95500cfc39463e112f813b61aab20bebcfe682e49d5ba17d00140dc35385b7ab. 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/QZDA62078739.