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 0x480c2d225f8b95f06233e7e9da5cde11a880d59b1fdf8c02dfc597094e29f89a. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f36f6616-95aa-4159-b98c-53c941090c3d.json and https://artists.proofprofile.net/proofs/artist/f36f6616-95aa-4159-b98c-53c941090c3d.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 0xf8d942db78a18e3093382a38679fadbeb685d73d9a8eaaf4048d650fc5c249f4. 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/BRKPA0600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26b1947447040e0bd948d75191e3f2496c3915d939051c412b7c6049d654f34. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BRKPA0600014.
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 0x067a45b7801010b959a44d1f5803ffa0e8d04c14a9b621e23580ee5bdb833132. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRKPA0600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d6788610caea14a114779be17aeac0604671775c9d010286f3dea4a6fdde92. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BRKPA0600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1600e1b783d40fd03a654326625a8e17cee3f81bc433286a96f50ca8d6287c60. 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/BRKPA0400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7943d253c150d1b9fc9698e3e5dfbcf5ba52ad5d90a0b3446d05122b2bc3ae94. 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/BRKPA0400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8a55beb0de43925e4e8e37bb09a45ebdbbb4890c1a4b3cfece3339dad5fc10. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRKPA0400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13955deb3f1e61d55a2d032c2dbf3a8cd7d54ba9bd011256437bff59e13e568. 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/US7VG1501459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a38b2bf8747ee7055a31182b28a5cf17210b30899422970b1592c07c68f17da. 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/BRKPA0400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d5e58731211963828b97b9a650b5c271ccfa1e6de59aaa078ac74053e939b3. 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/BRKPA0400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abea1fbad0ac737519501edb34f744270f6e55741ac7e2ebc47ac81809363a0. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:50:54Z), 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/BRKPA0400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28721e77dd2e9c9d0006f0ece1a80bb4132df902d9efcd3811192c18343b92fc. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BRKPA0400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2739afdb312e8d812a9f6b7057f01d5e6299695ca4690c8f2151003a317144. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRKPA0400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52b6445fb3411a2dec4ff810f7b63bfdc92c9cd7a84856a091910f6183b0ef8. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/BRKPA0400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da23cd021e7ca70775bef2222ae8f0731b7a193744ef7e27ef81963c39342d3. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BRKPA0400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb565c8e35e2f260979156173808c95c28dc0e860172c39149752df5c06a60d0a. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/BRKPA0400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869dafac854bc44f89660ff4f953ac8e57cc6f6101972c64749d6c126f8abafd. 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/US7VG1501460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df00c5b6eb74b6a9fe1f8e627799ab8be4f0b899f85ec13d74bfa82d45a7a14. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/BRKPA0400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f03f31c394acff4e352b205a1920716804ab4e0ac67cfc28e4ebbd7f52d3bdb. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/BRKPA0400108.