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 0x1f0770a317e43f1c9222c67f7c57402e96c5277fe232616057c6ede97a1a4511. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80da2e07-aae6-451d-a8b1-4c5d9ccd1702.json and https://artists.proofprofile.net/proofs/artist/80da2e07-aae6-451d-a8b1-4c5d9ccd1702.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 0x88e0ef25ec11ef33a30b1fb7b99cbe84255c24031de19145635a4375c40685ab. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/TCAHF2391836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66bea593e8ef72dc4d1d63db717b6a6f7da4ca174d4ae21e87b04218e5fa4b1. 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/TCAHF2391846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d39f870e271f2391eb6953bf07c2438b82f585ebc8ade2b777172bdfe08ca0. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:34:27Z), 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/TCAHF2391852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cd8e9e3e9a0fb57a2b292099a698b2c14bab616580ee6d91eb4f5a853cfd19. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAHF2391858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cacfeae50fb342602995dacdb1ec09c12ad94a254fd446d6afebef265f99dd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAHF2391859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697034f9b4d5c6f16a6e6d28cf64fdfca13ca09e9387921181d6d089a417d316. 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/TCAHF2391916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc591b6ca1a796648abe56f628f9b14f8e5f5fbedd5c55a795acfb3466855b3d6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAHJ2326010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e6950168eac6d0daac5b77dc47164d1edc52c888b9deb912e360f020de1004. 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/TCAHJ2326053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791789d2feb3ba6b34acfb47dd0800a8c28a2aa2d8f9bdc7c9bcc2d36f125b85. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAHJ2326082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3f9630f637200dc607975cd353f0a49b31105621cba0bd10776c20ee2ed7a5. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/TCAHJ2326183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d9f4ca881296a0a09f820278aa14a2b56e3d45997c9868a4469756935024c3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAHS2367145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d061a9a57dcef3ee1824b1a0544883687089126b64ed3fcab897c307a077be. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAHS2367151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524e2fb79e02373322deff9d624f4d952f2789772ab69876d40273c7d36204b8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:49:48Z), 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/TCAHS2367152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790863bba78a996ffa8c6bb36a60da23b321f37626f11bdd8bb3628392f71991. 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/TCAHS2367156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0be3b4c76212f18c5c162c8a33c718cefb0253ffcaaaeb6240b2bf510c5cb6. 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/TCAHS2367158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00d3b6d70c2b710f1c1a35f27f5815049996b03a2e0767037d0fda9e6ecffbd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAHS2367168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3978ba6ffef6db57ce251f1ab33d073b0378ab3ff6d7701e217429f145964db5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAHS2367178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c58d71796548f7d2d9ebe74a323da75e7306ee2b2c8680c5dc3b75691de947. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/TCAHS2367185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd70b899844067c6c27d9b0d9f79882358671a81c8a5520e8eff1f25c814fdf. 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/TCAHS2367193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc50e3f6e6f4aa14df2051755867c90b3e5b42134bd34ce42a6767aaab4233b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAHS2367207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef9db443d1da6e2b2cb635ff669697f24798a9f30055a699d5257edc2f2e790. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAHS2367237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083ed20705a9fa298f267473c6418dfe550c6ee954f6a3bf8dbc5ef155b35cdb. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAHU2492999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9685b40b1e9c4aa9c873237b5701947391da4cb9f74b7de7178685ba68f5522b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAHU2493003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688a3db0c96cffcec3d658d95ee6322c5d2f3659e1e7b57946ca51ee4e41f5f4. 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/TCAHU2493013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f45f14015538137c63396d5b4f1960b2681fc6027725bf80581cfe0b0d0573. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/TCAHU2493019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf04ec26fa3928b2657347ae099ffa33d048f62aa62dddd8f937488dd26cce9. 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/TCAHU2493026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3ccd54b1686fa618cf9163f9aee6d42bee74055f5d5c1dedea29d558570d0d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAHU2493053.