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 0x13f69d5571ac5ec215117db6f48db891e32a27f0bc5f4ef7e33501ba522d16eb. 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/7ce59a33-20be-478b-9152-4e7d6d3c288f.json and https://artists.proofprofile.net/proofs/artist/7ce59a33-20be-478b-9152-4e7d6d3c288f.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 0xc29ba3e52b5099c03d22d90ea43c1a57cd0040a8a42c94024e7b7d878ed60fc9. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QMDA61344024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318a01d11b3ee86fe244b2f71642b11ceee6c6a4ca2f4d79e43d0e61676ea6db. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QMDA61344025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f02b14f5f47ed7413427bc9be3b4884ee920a559aff89cb52e5501462f60f0. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:22:28Z), 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/QMDA61344026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48006f243c23b6a84e4aa83d28f66e069e5bb3180111b65f515e22ff6bb2dc51. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMDA61344028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc14b06fd432ea7fbc1fba3ac2511b9f31d14fa15793e4e578839cf795bee0c. 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/QMDA61344032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ae5e987caf03d78a3ea29bb369354477c5f03c1a4527fc3ac0736772dbf5f4. 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/QMDA61344036.
Alerta Antifascista / Ruido Anticapitalista
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc3f35310502a24f838806cadbac28681236f71b25ff561347251fee71b17bd. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:03:58Z), 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/QMDA61344104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77753816a7289cff2066cad0bad9b40a02939954814c8f51c9ff11591ca193d. 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/QMDA61344109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9097d7298baee5da4514cbb20c5890d3a637a75b513d2e635691f6bdafe583. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMDA61344120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95a3704e97176d380453956208842c03dba3876bc81ec53ef3432525a4cb71a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ES31E2001252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c9c5e287cd2f6aed0e384fb3286d7c3d24e8b94ac498326b5ea8e73673d296. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ES31E2001254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc762611fa4d322ccbc6ea413b3efa5ce04cf89d28ed79f61a943f742c4d18182. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/ES31E2001256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b2e7d80fafb61ff511c685eb96da343bc803d46cf7aea0dc7bd1d2b2275fa9. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:04:58Z), 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/ES31E2001258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b3650daab9f7f995296abdf279ed2608e7aafb87d25f63fd50c287914b1833. 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/US6R21445958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadd9ae3c990990bae91ec031867f2d53caf7746fdd3995ce57da5d740d67564. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/US6R21445963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe500eb878b1ad1e2383650e84c8f0fd320c6056b93879cea66e08f7e4d109f8e. 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/US6R21445969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae37c631216202aa3eca870ed88c94ca8dc27c2978fecc67cc9bcbdf901a119. 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/ES31E2000325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e10c46bc0366e1c63b235e173672b9681d8d96cc72c0abff9f149209fbf0898. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T09:07:32Z), 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/ES31E2000327.