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 0x7cf3aad7bf6d20b7c17ae16f2c8dd0269755be4321ae73d2ea7c2c95d407c29c. 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/f7737c80-52eb-4349-8cee-191622a886a2.json and https://artists.proofprofile.net/proofs/artist/f7737c80-52eb-4349-8cee-191622a886a2.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 0x2184a6608a00127b55622b44cb384bf5b2525a692ca2e4eb5089ac27a74ab4e5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCACR1616846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe446863960c487d52e3e3bfe6977d85a381496c17ca37387ef592d49ce66830f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCACR1616849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59a605224fcab3093211f807e483d1b135ce9fd0067ff2fe6dbb5275d7dde22. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TCACR1616852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8516e015b03f2c8f758baefaf3e99a1810a50dbb4389733f3bccae138239445. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/TCACR1664276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556f1d896eb38f97266105c771391d0c972ac5196eb54107ec914f607f4fbf63. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/TCACR1664278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e4c507151ffae981d7148c5f7aeaddc02529b8f695760b4c0f4d0ebc20d368. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCACR1664279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c358c177100a4bca094d50684b77a3360ccdf2374cc868d778d2edd39345fa. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCACR1664280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3410140232146f29282e0dde09a206b8ca2d8d1c3194a2b1a40ce3141eeeb7. 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/TCACR1664281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f45adcd4559d212b405f05ee8020f5d81b27a04ef7b76c1d1800b85f4681412. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/TCACR1668191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507265ee5839d9b5992f9b673e3e617ca431c69bb363343dc7939f3c7ef94721. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCACR1669585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9937384c2eeb02a2d88c46153449451f399b0af42d8f2c37176d81d81dc8c4e6. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/TCACR1669688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6f78029ff734857ad36fe2f7f0d863d8c8be7f0a6a4eca92ddd4c372a81a4a. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZ5AB2230905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b130406aae3648ca52d2d4838acd0652a12d490b1240e4e8e089a62e679a57. 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/US7VG2351726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe286245a55747e6501868808bb51b299e12a8496d0ed5d6595919d04b2d28241. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/US7VG2351727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f96a5beba70bb9de698712cb08ef1523fe7bae8bb2b60d7baf14c49611f3de. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US7VG2351728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce40bc201b9618299b59e9e8b0361f44d63897ae6005399969e0601377622282. 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/US7VG2351729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf29d50f1d5017fa89acd4adec1308c7fb51cc1fac0cf65ab2ea1d9b350cee6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/US7VG2351730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8a39c4625a4ccad6582f9c07e1d0747e048dc71c6b211574d09ce6f6f65ce1. 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/US7VG2351731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7010987267f58ec03ff3cb0d0e941aeadaa4fb97e2b56af708b15f912dd13ad8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBLFP2558673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11aacb2c28758c86bb8b8a22579e5238d52b7f7b4feb4747002f799bb97ee12. 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/TCADL1850654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1205eea6aa14f16d40e0e510c55414651352dfb68b44aa32a00fc33036e82e3. 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/QZHZ41914748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa497ad286b23916bb7a8a14dfeaba48a83dc31f70d9f3ea8e42230fd28f50d27. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QMBZ91518151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4924b34d741e5ab4c6584179fb5c13643ece9d5641833f49a4dbb8f487aa2903. 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/QZNWT2271888.