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 0xfb80c19e1d6130f8fa29cb98e623b098eb26fa6e183eb0610e7196941251bcaf. 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/08940363-17ce-4aab-b618-6ad059d556f0.json and https://artists.proofprofile.net/proofs/artist/08940363-17ce-4aab-b618-6ad059d556f0.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 0xad95806d0bee3e70abdf2f51f6a0a7f7899adcc1a402e956602a41b988fc9725. 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/PLC062425934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a939682def02d23fbea5ac1f51f6bb9baf90df48ce411786fb52efa416a489. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/PLC062424005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68571b1ac4d4ca3efa1e666f531f8bfa4e87a584cafa4f88fece09c0393afd1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:01:37Z), 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/PLC062421913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68f45b339a35180af4bb4601548e76efd40e3fedb6285cf36cf382cfdad9a4f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:14:43Z), 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/PLC062412058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e543d530c713bb35535c4b6d52bb4e347ef8c5f0f76a814690ecd1a83ff1dfb. 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/PLC062405473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f35a84db1dda1aec0e5418ffbe87460901daae314ce78783c039fb4542875e4. 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/PLC062396303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ed6be19001978152ba962af410aeb32aeeafe1d24e3d65c6ddb2719b5cb74f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/PLC062385890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a6333370b88ccad187433e78c070be2ff501faa58217c6cb36be4f69e4a1f9. 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/PLC062384354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b048e16106de3174fd7060b3173f66232b2ed947395d309badbc28299623f9. 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/PLC062382844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad086188a3d01e6c004de61cc35c401be8d51a4fcbff4d0b7b02acc2b124630. 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/PLC062374041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4d5ac33278700aa8a9b262b6d052699cb4daa94aed342b4423f3cd24041be5. 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/PLC062371266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3ec998c2c4530328649cb72c8475a48463d0fd3fc4af78f7f89de430d23e2c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:02:10Z), 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/PLC062368229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf85a635a30d531565bb8a67f5801a6063bf9a7d5180d2f09730b3b60e9c4e82. 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/PLC062365645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11f468c6413a6476cac0ed2c867c24f16fac61b53a22c656c9e34067f173695. 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/PLC062376494.