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 0x9419fc45b1e20bc217ecea0a59f661a1ed542659b0c97ca238da25669477690c. 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/79d92493-3425-4617-acd6-d32c8da3b0dd.json and https://artists.proofprofile.net/proofs/artist/79d92493-3425-4617-acd6-d32c8da3b0dd.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 0xbe570c30818e73eab0a9a733b888f996b7d5056847258aec1ee23be4afa411f7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:02:03Z), 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/USA561150855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7470a64da445632423c08cf4b28778a62282662c13d1f6b65993237bd48ecd98. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/USA561150857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb8b20d4f1eed5abe9837beafa9591fdbc4da6f1b1f79e2fa30a13e0423995b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:15:27Z), 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/PTVI12400706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5956e5250d230b2e87399658d4ff9efcd894927a92bdf1c6d370c897e4475138. 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/PTVI12400719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f19c541f15bd6bedb8f8704d11ee37061320cf9a957dc7a2ef9c29d587a021e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PTVI12400714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82767b798dfd4fa0a4a9654f5909d91b7cce071b07de0323b8d300c7679c37a. 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/PTVI12400738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0e38a193cbd85ac26bc8092c717d715706eec53dd9f5aeb826e6fe400f00cb. 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/QMFMF1498240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7920c46aa1a3a52127cd42b427063292027658ee45b35bab3e5d1500de963cd7. 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/USA371471227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dda3f7d3baa422c4b9a8bc146280e0adf44fff66774abe35f20697c5bcef546. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA371471230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc60eb5211af71043015b221c49fbd3df9efbb0f669695054fa81c9691819d84. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA371471231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7474050ce273354bdbdca99481e44105ccb1829b928575f1bbfd049e74e459. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USA561223277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa032e2b8fd2e640b550001f8d3058c9561d1bf7d79bc3616d522e32197c54713. 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/PTVI11400292.
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 0xa753a5b51451dcfdc0e580ac0f5deeae000335cddf54f8065b7acbf640622d18. 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/USA371024343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54cea91ff781d2456016fd82c1916b3854aee07fdf7ae279901d11277a0f65e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMFMF1498233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd54d831fedee92a7ef10d2c6dda50134476a6772de59c29522a6604392c211. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QMFMF1498245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcce7f84aaad13dea33bb31c7012b2801d7ce1b5e1e9446903f6cadaa538a5c0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA371471225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f26f0bfa7deded8968b5024858dc399fe71887bbba240c3bf42f52e86f71079. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA371471232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcedd3d2c12c8eb6ea74ec710e143d4c15e6e83d3a2b38314cdf93c6ee511c32. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA561278710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13dd15770746aea94f355b7ca7f894c2b3bc1b56d84e0877be77ba5cc948dbb. 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/USA561405533.