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 0x2a4b70faaae5ec29bf4f2db1cd627d3270b007e320838e95e6857143de1c3e79. 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/f2e6b038-8e1d-4224-94ea-25975ae8e9f2.json and https://artists.proofprofile.net/proofs/artist/f2e6b038-8e1d-4224-94ea-25975ae8e9f2.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 0x35ecd14a5c92f2e49118e465f989f874c61c39aeea535edee7c40e472305a3e2. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/FIJKM8800051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666abaca45ae56811bc0681bcd73f58d22f80d963d79b85474e1caa9d9c79400. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:19:39Z), 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/FIUM71100284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de768303c412cd56c8e35e649536b10a87a139795564154b68040113d6805fd. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:24:20Z), 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/FIUM71100285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f1c1e5f263a6fdb74b4d46125a3f84a267bcb0f909449eb2a60448b27b9a45. 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/FIUM71100286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc08520b13497b470670ea5d83f4cdf0e441ceadd762c9e8e5bf4dfbc632d8de. 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/FIJKM8800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d6b10e1ad55718b2aedabea0c0e38f1260699958642de60e5f7302a7309ad3. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/FIUM71100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2155b29da6f7d33d285eaaed5091b5e6221d38021fba31f81e623f29d4d5351. 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/FIJKM8900142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc910b94ec1896eb0634f79994516da6dc35421e4c6a371e18217faeb75c60072. 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/FIUM71100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb781d925ada5dd467d5d741755923d36938d32f238389388f5030cebe08fef8b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FIJKM8900144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff2ddddf0da6d70c96a9b3e52df6c2ebd7cb47e011b000361fe8407dfb05149. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:39:19Z), 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/FIJKM8900145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ed09ef10c3c0bb552348e887059abd5ff68e5877d8f3b133821bb974bec833. 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/FIJKA9100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a9924ae9f46012b3c49242cd83b5c47ae76d51fb2bbf7416ad02f355ae0816. 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/ZAEI71900770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39ac5a7981134eee49a588302058c570ddf1677fd04c3546f330545fa51ca59. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USCM51900364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17ccdf57e8061794b5083e68ea657f11991bbd1380eadb76602b853e01a718f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBBPW0400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4bb4bfbb6eb2bcaf8f49ffac698b53b27ea218bbc9c977c6334118a22d9e16. 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/USCM50200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a2abf375090d23d642dd01eae7a73f1867f53b8472ee894cb8cd61ce3483fb. 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/ZAI911600041.