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 0x3c9ca21da7f0511cad92138669ba6f8e861da0f9dbfc17156c31cf5ba98f7343. 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/b4248463-a1f5-4e2c-91ee-aa0bcbb09f04.json and https://artists.proofprofile.net/proofs/artist/b4248463-a1f5-4e2c-91ee-aa0bcbb09f04.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 0x25b0c6cf174ba3799931e3920b2f40342a105b140b487fd81695824982295ef0. 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/QZGLS2119935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e013532883411acfe500dabc33383db774ec2ca35f1ecd02e02a0ea6a8f7b7. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GX53U2070412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa051241a765bf2f4bcee0791fc61307db9505ff709ccb2ecce4dc2a4d1529eaf. 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/USA2P2210655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d3a3bd81baf539a6840528a7475f3241f1e7575577dcd0868ba9babe5031b8. 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/USA2P2210654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d3a3bd81baf539a6840528a7475f3241f1e7575577dcd0868ba9babe5031b8. 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/USA2P2210654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34af17afa9f7109f0e3e92fd6cadd52479261988a05f25dfa55f3fd5743666cc. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNMX2230650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb287b952df211418f91f6bcd9999e2816dd6fb21180d7d2569287b22af549ea8. 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/GBLFP2287190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac2813dd9cbff6f7416a74f54871ddae64c041d244ee090efb6f3875618632e. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:22:36Z), 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/FRX452255248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32151dfb2dd00e877486c460f6841c162ff12f5b676a6958ae57d243cc1f3d5c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/UKXN22242758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f1c75dba93f37cbd7d90c711b8b771d4de50b68cf8deefcacdcdeae5da4108. 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/FRX282366118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffa8f86f29efd9df8bf0c4e1fc51be9e9d8912d50d2e1247318ede411e6d7b9. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:43:34Z), 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/DGA092365986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2636e46ac3390a4b7f265bd40700bc5ba6a5424120716309434710ad6c5005ad. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:40:19Z), 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/DGA092365987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d12c51d13161eec3cc16fc06aa574f9fd14ed4abc52d15a4a70e15a687d181. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/DGA092365988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d0ab79c60b157cf4fc2f76696e4d051c1e4fb9f9e2aaf1026a45a68ad445d5. 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/DGA092365989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826552ba17356148eb771a5d924a5bbc3e7a9c3953723c2923a7cf26f5520b61. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:08:45Z), 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/QT3F32483397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325f8753fab55ce20e34a70e362520086ab5eb573fa5f099babd59c76095065d. 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/QZZ7P2575449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8209d6247f9f4e03c5a62e0a3199bd83d305c47acb89ef8ee9fdf26b2446f275. 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/QZMEQ2279132.