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 0x1ac822305428b0c89a0d2a24a8e009a41e4168533519ca0ee138e6c69d376aaa. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd075226-87a0-49a2-9af6-b64cc765be19.json and https://artists.proofprofile.net/proofs/artist/fd075226-87a0-49a2-9af6-b64cc765be19.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 0x1a5a65554068dcc6c1d71d72e4fa70e357645419660478d106b124569ce07412. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB2LD2310041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dbcd605178d70dd83b47e0d23fa949dc72699598aba78ea573b9a51cdd26b3. 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/GX89G2398268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600c6fe8250cb607acd6b5ec281814f3ca30145ba65f53b6768de1321511bde9. 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/PLH492277302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5767fa3435a190c22ce8884f441f1fbfee7f3d6503d92416cfceabc6fbc778b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX5MX2229385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915a543a70558dcc51413a99db48ca078957be6b186dde132d753ca8ce2d28e9. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:22:58Z), 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/GX3HH2280274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fad34da5eb846bffc210426465607ffa323b24fe72d6bf7e4a97461684359b8. 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/GX5MX2134985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c7fc7d304838a3dc2d7569be4d240fe3cf655101ca69106927dcaa82e12070. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:29:13Z), 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/GX4R52127478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f022ee5ca9dcbf24753f5b1b5041c347ad659a5281ac942b40f8862320fdc6a. 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/GBRKQ2119645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96ddf46d88e232fd6159c88c89ba6628fbd3351141b3b5d71d99354428759c7. 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/USA2P2122929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa220e4cac846fe14ab1e99cc0aef11cbef6fc9ecdae0627f0092ce7ae5702eef. 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/GB8KE2163933.