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 0xfbcb16a48554896c192cf351b685bf0a578198ebec5227f377ff27f6af9e3720. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5067f0c-c50a-4111-8f18-963c296c84b3.json and https://artists.proofprofile.net/proofs/artist/c5067f0c-c50a-4111-8f18-963c296c84b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mrs. Doubtfire Original Broadway Ensemble
Mrs. Doubtfire (Original Broadway Cast Recording)
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 0x4f06102be97cef973ad31a5599b34c10a96b0288028c9442cccd1a3d0e0a33bb. 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/USSK32243017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01031b64672fe5521c3db08d5010e311eca82478c484dd7d3decba17e90209ac. 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/USSK32243018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1b034d21b527a4af99424481942f8699d1aa9b3c99a1fc57b28e953356fbfb. 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/USSK32243019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8db5c515099fbd2a84e6acea15e8a0a8274d5d30b5432575eaec621207ddb3. 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/USSK32243020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd650b1c9ace7898c6a0ce3e7a7f296acfcc26b66c967df248746fb275d661e3e. 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/USSK32243021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966af39c06391e05cc8ef1c92624561c20e50eb5b0d733b96358ad866bd4f955. 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/USSK32243022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410415e99ba55229327f47467407908820bdd5cdbaed5353ae38618c5e025ad2. 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/USSK32243023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4024a18685aa1f9ed6a092f4754e192fec4c2e83b1811f516df2fe0f0bd7410e. 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/USSK32243024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32420dd9a07213d4cab6f186ca8e80fe7e66af765d14b430d4e6675b3af985a9. 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/USSK32243025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde89fe42a788ff625996bee66bafcaa91a06fc16e3e80381671d826e5e4b97e. 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/USSK32243026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514447dce28fc9a6f14d4f7c3307f88c7985b02cad69b9a30c29a49b9374e495. 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/USSK32243027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29a3a0322e6bdb6a1539345fe8b46e5850aca7b49a141ad6ec9e5828b9523bb. 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/USSK32243028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85f7a8d19d55ce7a4322f42765dd214e4abf2f1e10442dec0776f4bc083edae. 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/USSK32243029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5930ee36d80086ffe749430649fcb1a4b0e9008d005f47d92de250d648dfa575. 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/USSK32243031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9040fbcf7987648b06869877b6adecf0fd7c0f1deb8be1cb10ad2bde2fdddf. 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/USSK32243032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99811897816584876f0e520dd1efcebadc53f9667181af921f0fdd119c769123. 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/USSK32243033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61507ba7a4091d0cbdc08aa67633e977b7ea52957274df5653d6de769212364. 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/USSK32243035.