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 0xb014938f304c1c9f85d7fd733fc3a5259b3c9cb1ec6cc8081470ca0e90ce490a. 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/171372dc-cf33-4035-8c1c-4a4f7cbc5dfc.json and https://artists.proofprofile.net/proofs/artist/171372dc-cf33-4035-8c1c-4a4f7cbc5dfc.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 0xaf656a3973e60184925a7078ee57b9ee11c8303e5b22e69a28716e0d2d30d3aa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES64E2416478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d70d3bd7f7edbfb18642d3c35b174772b350fcc38d813d9dc5590dd6fedfbe. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/ES64E2416477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac1c6409ef1109ba872a13ec5e3ff793cf454cdecec530b7bf3c6aadc6dbdb6. 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/ES64E2416475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057c72dbe685005b2c8b26743d6e64e70b03bb294c04e7d19ce8d122d330c19e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/ES64E2416470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265e4cd9bc992f9ccfbddbf795b0c0055704f039aab75eb0b3957c860210fdea. 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/ES64E2416482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e7a2ea6da585f56836e9091986b88c32f156fa739ab5cb025ec6426efa77c5. 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/ES64E2416485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27bf246b93cb0c47844f3ffc189f1f5e37df9fb9c6d26b8d7057ed577062b90. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:53:18Z), 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/ES64E2416473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd6d63e0276baa8f6806b7d9f125a21a74e4860b26adb63c5186628a25a548d. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/ES64E2416468.