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 0x3478de868922536d756b683693eaf305033b6c72f583286de65ae2072523d9b1. 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/12574eca-908c-4e0f-8ca1-2818d3f2c5d4.json and https://artists.proofprofile.net/proofs/artist/12574eca-908c-4e0f-8ca1-2818d3f2c5d4.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 0xefd216e2a36bf9a23271f67b46e6fae3729c40cc0edefdae417efb1b1b96449d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BXG6R2500173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d4b1150f9ab77251976d24f0eca9526ff02c99e36db58851117b8a1256c486. 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/BKD6I2500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed26518c92c448b750399cf54c55e0421fcec838783bea57c69f84b90e643325. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/BKD6I2500084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbd4ee6204719e6570397a4a13209a2d19bc110c5cbbecac82e74701d62a5cf. 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/BKWK12500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc27de4b72bacc6b6cee2f2ef4c44983120437cbd704773166945c3668120c0. 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/BXKG22400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d79169a94007c06d67c483c0602f932130941905077c9dd67d0ce3e4151a95. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BKBSS2401114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc27caaf5022cf5137c5803632dd22d7e3ef96be24d6c566a698ed50de5ba28. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKBSS2500133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5808fd36452019c8765349ead870cdc3d7dae2195260d6f2cfca57e2f4ed8af8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKBSS2400916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba318a4494ddae83a439962ff5a8c9da4caffdf928724fbac2218ba117c331c. 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/BXKG22402783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cb4a5ac98fd0099cde90f50c01cd0151fab3fb6b7feb222306606c24c6f634. 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/BX16D2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f80389e955b5fdfa65eb004a5f9d3417d5afaf2e6007c74a971d2b541a9573e. 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/ESA112324203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba318a4494ddae83a439962ff5a8c9da4caffdf928724fbac2218ba117c331c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXKG22402783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7052ff466ca0672c2a8303e3a878071c4d383789809e7434e9528f976d5ddb2. 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/QZMZ92590266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07a31e6c9f0e1a4cc454ff941b77aa57c43183a08d3749f1d6a7f490e1c95ee. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRWMB2500199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07a31e6c9f0e1a4cc454ff941b77aa57c43183a08d3749f1d6a7f490e1c95ee. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRWMB2500199.