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 0x03eb35b3f8b9138020c34c0820c30691180ccfd9ae6d25c9f5ae78cf920bf25c. 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/df2efa24-fc70-4ee5-827c-e8b1fa18abf5.json and https://artists.proofprofile.net/proofs/artist/df2efa24-fc70-4ee5-827c-e8b1fa18abf5.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 0x1394fecd5d4673d5085224a918d3e6374b7add6f81df72b4a04a453af7373f02. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOAGW1400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cfae26f50f1e157329b819d16d1ce11e036193f3f0e827b1476671b966bc0a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NOG841425010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1524e75674dbb6e8cfb82a45ee09d05fec3f2231eaff2e23d3432c1a01e9a35c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOG841425020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf92b666f12d97253bb9753cbe9ca9da1471580033a14e8acfa234747003f28c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NOG841306010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b33827c4a2c6d33a27098d1c83c8e4b0aa6b93a20fe3c87927a1ee0bb964f6. 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/NOG841425040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002ea1706e904a5d53f2c77f924b9806a5fa3fadb6fec43879f14e9e48b50280. 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/NOG841425060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18f7ec4ffb3d1176ff4fa53c436e82ebe089e48fd6da3156c2209e90e61109a. 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/NOG841425080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4393577f7c3ad5f43675da03de0204b1b91c1783f7af5a873e88addf1250149. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOG841425090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea9481760079f8936a91e02fc50aeb74ef913c95b02c17e3c32cf10bdecfbcf. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/NOG841425510.
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 0x4df7ec255e53ff036bcbe43cb7b15a33b1dff35a9d2691cc272c0d66fe239bc9. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NOG841420010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff121d2cbb241d4f6910b87418a68503076ac64d99ac7b969d7429abc164ca7. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/NOG841425100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9efe3a102cf297f8544a191ee6b819f4fd590b15c0338cc91c641081c5d28ed. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/NOG841425110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514af04f1df520a4c8b82bf3b265f3df542be9bda95045561b75ce334c630bee. Chain 2 (Bitcoin): anchored in block 960165 (2026-07-29T23:29:40Z), 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/NOG841425120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25547470b64bbcd924ef83800e491994c749922c0dfb9c7a43c57d5d5af103f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NOG841425130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc39a036eebc6ab9814267bae6493b11dddaf9c9262059d4de7a90bc7603702. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/NOG841425140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cd1549b664d10a4d8f4ec965560a7e32fe1df76015456d1fe1bc55ebd339d2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NOG841425150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8950269f970963ea9f30365a3f0d367ddc410412a4d521dc75d6b2ad252f20. 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/NOG841301050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7570fce28f469fab71ca42520d4e69893c30a22e1fd58a798ecdfc7fc643632. 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/NOG841301060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bc77b26e1b4ce0bdb9a4dcc08686e9c696ba78810d06f1b4f22d1302209cff. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NOG841301070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f82bbfe95920262dd0c8cc6862baa9b45d7fe8b280c2f065f860006a0e0b49. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE5BU2521931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae4e557e3357439132e1295e33445f143dd1d482a4daab59edab2b98e8e1a03. 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/SE6SA2466540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af174f96cad2bf580bf1bf7b47ece9c9ba577b189820fcffcfa4981ec725283. 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/SE6QE2348163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcccc58b24c423a36e8b607fed6f19d95c33ba51052d59d72026a4ff6bde7ba. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NOUM71700412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae496ef0baedfe192d54330b1007766fc48856b8be2af1787c903f85072121b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOUM71700134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37d8889af32305d9e344b4fb89331ac184afe8906b0224ed77ddae73235a7e2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NOUM71700054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad9d2fb9870f32512fa693c7d919b4c575557026692adec5f99f8b6d324e1b9. 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/QM2PV1564126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dd37ee0722990bbedf991a0116ad7493ee66137af1664f1fe0f81dccef3f49. 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/NOG841410010.