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 0xf3b31d8a7c674cd72d255420cc7f02c0a2c014dd20f2cd5923a02921daefc840. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdde6de4-55dd-4e74-b280-6eda5f5230c3.json and https://artists.proofprofile.net/proofs/artist/cdde6de4-55dd-4e74-b280-6eda5f5230c3.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 0xbd457df1945d33e336fabc4d118712705090d63aab3d85c63ecbccb1c8de1db2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES72308823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa82b4495490ca098437358d221f5493590425729333a2592a1aa74c3db5c7fb. 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/QZES72308824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb812ecd229b8407f44a4e07f414723e5f7a242f6ad58ae80d7699c9184a4b079. 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/QZES72308825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cccad268bfe0bb548520f44d6d6cbaad116374867ad441d0112fdc3ac27e56. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZRP52236720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e64d31e3b2061a26fc0a37cdd8d756a340c73d306387435c405ff2d016a562. 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/QZFZ52106068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf905e5c0eb2b49b5f31a240db0f1c3b0aabd255afddd3c429fac7e744a5760b7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ61914689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39c9a41b8addddc1ac112c1ff13e1c797c524cce2faf43c54fdfdf8ed7cc0ed. 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/QZTAX2352680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa71195338974088cf357653dd2c10288493de67f8f4bf1ffd8ce16d90ff8cc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZFZ32419316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39c9a41b8addddc1ac112c1ff13e1c797c524cce2faf43c54fdfdf8ed7cc0ed. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTAX2352680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf421ef3338afab690d3eadf3b36ccd371cab5203f49b061add8ddb9d1e11435. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-22T05:38:28Z), 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/QZPLS2347082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7b25b3add48728153bbc40504552ee946a29b5bf4f8aaed4970ce8bd553663. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6P2322244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cccad268bfe0bb548520f44d6d6cbaad116374867ad441d0112fdc3ac27e56. 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/QZRP52236720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e64d31e3b2061a26fc0a37cdd8d756a340c73d306387435c405ff2d016a562. 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/QZFZ52106068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5756ca3a5b03984608559c2f28ffd66488f655793b625883c923858183d85d74. 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/QZFZ71933014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3f3de0e1fb9810b8a843d98b1967b65c39404d8f330caecbf5ef33ab98cde1. 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/QZES51889211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f0e5f4752d28ad82efab33d6b2fbfe7084f712801a890b8b8648fda88b5115. 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/TCAHG2379933.