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 0xdcb2077585bea71593889833ce4260052b0cfa6ad2ca9ba640829e61d73951f9. 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/104841b6-f03e-4421-ab0f-fe72a28bb6de.json and https://artists.proofprofile.net/proofs/artist/104841b6-f03e-4421-ab0f-fe72a28bb6de.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 0x3cce74fc69e4432b386044b466239a6712ae693569b63a9fe8b571e8350e97fc. 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/US7VG1769066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fa253ac30dead9432473f928b0eceeeb14833f003f20ca43b4f6c149beb4a4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US7VG1756435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f0473b2f4e796d4368140f4e8993a0e0c2e08369f36f7b50f84859ddc6b282. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ5AB1779260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b7909edc3a57ea97818cbde0394f5fae6ef6783ab4614182c1c2852bde0599. 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/QZ5AB1779264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218d6f7e2a62f5705c766e431f0d10edd599108558397e59890675c790a697ae. 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/QZ5AB1779265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45010346debceeb2ad31db2f0d9fc0c4514c1702ada026b6c4c65ed13fd8922. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:28:13Z), 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/QZ5AB1779268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9ba16acbeba9827ac03eb9f5b1dafb5dbaf943b9106c95e46ef97486178a44. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QM6P42079200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171fdff7bb0f110d62c078da486d9e76bfb62ee2ce65f99193aa00004628c627. 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/QMBZ92050818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6935b0c98dad81577409bf93b8f9a702f21bdd3e3a343ef18d7661e8f7ff4f89. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/ZZOPM2110300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5836df26908775b726f3e23ab661dcd8703961f7cfe73b07641943b352a00f3. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/COA6W2102922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc432c1841142f799b724dd8bb27cf8ad323116fada8e1faafc7e31783a31bcdc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/COA6W2102925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6d409b8b62f197cbb6fccd758b0756b30910f3b45cfec47c11e51d40613c13. 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/QZ5AB2458957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca8ea889d0d7a797243521b6886660552d81ce57fc537bc40c62ba2f4f186b9. 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/QZNJV2492959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca8ea889d0d7a797243521b6886660552d81ce57fc537bc40c62ba2f4f186b9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNJV2492959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1679b46eaf12ba8739c5a0c4515ae702409d214a0ea133bdbecf53712846df. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZNJZ2454926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70426a4f9fa935a3daf5c105d585797b8209263f1d1e71c77204ebcb6920fbc9. 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/QZW9M2433969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c35f37753a39a9e547c7a5d52375d18ea0d4698e26c810547b412c85c5ccedd. 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/QZNJX2464680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaace6b60aaee34ac49d5c65daa491c705f265411f1eebc311a4cdb97c99819e0. 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/QZGLM2452739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4265942d401f3bfca991e6bba288eafe5e122fe34d3d9d8f0b20043b3450b3. 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/QZTVM2392308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7d2a9dde35b9e26cd2494517371c83ae57b164d48898c95a83c7a194c5c3bc. 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/GX3Q92542070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11930cb1b9fc5a9899fb56fae3565dd7fec850b73c0fe07dbbc2196da0dd5ac9. 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/QMDA72137157.
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