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 0x0e207b6741dac1c070719a11dd66473498d6400b4ac4a379afa8af1329257039. 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/1c4b806e-7cec-4c6c-8352-97eb9c7d52c7.json and https://artists.proofprofile.net/proofs/artist/1c4b806e-7cec-4c6c-8352-97eb9c7d52c7.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 0xa2e3b32affc2022367d5a3b08bc334319db6292edf54f0c7b2f8875184ede6e6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:26:43Z), 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/BRACP0600236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc211be5cf5eb7ed52ef12eb818f8557108b5b345dd01fc9b980753f8894aecf2. 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/FRX201725654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9136f094660c94c729d890e530ada2ca3e11fbeeb9bee135d58a61c2cfbb4ca1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:00:34Z), 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/BR6211400601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3afba7e850372ddc3d511ca3dd5898668e42c473e86f6a38890049105889dcc. 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/BR6211400603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0549d493fb078572b3497a6fc4a63f03e92ce1c82355ebc3e15f116785d18ef5. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/BR6211400604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38aa06f6a35f522ca9889afc6768005face73c528fe1524a4cb8b3af07892883. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BR6211400606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935d212cf5034c2c6289908eee7f76105c400718b554206708ad65944bf0d2d9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:41:39Z), 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/BR6211400609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf702f5605a0af53970e6a8ac272c500b67c303c82038ec434b83a213b9127c51. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:28:52Z), 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/US7VG2184667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf1f27361fdd184e0597a3a6f50dbd1aa285f840adc1ce2b921bf437c9d3e7d. 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/US7VG2184668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07aa9e0468c938d69a56f1123781dc8221d7d54fcd8320ee2697dbbb1f5eef4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US7VG2184669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d636ec342ea71949426a5656e2f19ce3cc3e5ca736a3f48c5b60e8d69c4a13. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/US7VG2184670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b730d3ebffbacb8125b0d203402bf2a0e6ea2be252e0c45c8023d88ba505311. 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/US7VG2184674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b8d49da72a051ebb885280dd091fd5f6c610542f61901f10061124d27dc425. 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/NLRD52216867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5dcd05d3df204202e3a593c0a9d193c07714080b621cc71f2e256350ca5667. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BRLSR0500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66e46dd16934404123a8bd7cbcc4886653ba6fc25f59a9b79006911e332102f. 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/NLRD52303435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01c165e397ac5bca0c59f8a2977ed8c79937ed6a77633a95cd0c6cdd7b60783. 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/NL3M12511421.