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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa191a3a9ec5ed422986d312a3490fd7d95aec5a439c613eca5cb72fcc304d164. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9d11c9c-9b56-4758-a4bd-4b1e7dfef98c.json and https://artists.proofprofile.net/proofs/artist/f9d11c9c-9b56-4758-a4bd-4b1e7dfef98c.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebcdea213b3b6eab752f479335dc6381e8a3489da972886d4191551f0c68b21. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/JPS801947582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1578f20dbdb081403d6a485d89a38229c48fe163588e9b03251121b4b5117c6a. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/JPS801947583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693134e26751f9fb054569964d9daea5bad101d56532c42e4881a06dc470bde4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPS801947584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4828c5bac03aa1cddd414058d366e6f766732597ba8efd63e21d1580bc50b336. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPS801947587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67eebebe892fac9bd1d197be6a01bacba0b8518e9bcab8ac12fbb93e6bf6122. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPS801947588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2a48cf266ec170b8d1a670cd29d31b56b1d7422082af371c2c7f3c9363b016. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPS801947589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7afbd701913cf80804b3748c683ac704dba0e2eff651ab2bbe193d792e7c18. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/JPS801947590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967e28dfdde9c5f705753306569f84a05b6bd3c0b15f1262e59deb1e4b7feea3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPS801947591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69fd110252c1cd401222b8aad497f7cd30ec6516585a87590d9b30ea484d673. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPS801947592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19abbba1a682f2f49f334ce95975b0f0ebba6134a53c0abd274e211b00853679. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/JPS801947593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe61e5b39b798c5fb2b73c8c56c6e60080b79720f983ae82834328aac904e8c6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPS801947594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c1e615a554f9285494da65ddc89460cd257a01362fe494b95956b2b4367a7f. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/JPS801947596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16875310dc7e18aa1a9a97926ed32d59c1afa5853c88ad038a17082d19309fdd. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/JPS801949966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8fff242a83af266247165ad93ba7baa0b034a7128359c0fee3d02870760f11. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JPS801949967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7ac5150fb8145c7637841755bf7a458f2248203d69fe9f0fcb997fc1bd8cf2. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPS801949968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aeed20a50795512c9262d51753b81474bec578fb05484ceb79fe95a16a3e1a2. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/JPS801949969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fbd32e47ae4201ece1526d43da472101e6a2231bb13d09915165e908aaaf83. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/JPS801949970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0bed9366ed9dccf15ea04f7fbf1842ce2618a4ee88a7607b4054fa1e8313a0. 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/JPS801949971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa528a3a4c527c2ceea5d4ef34f6fe1fa52fee7e3b89b2ca0f70fcc8d974112. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPS801949972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea4083e5ca462cecfbd94f4f15e99f2c85f5e4ad264bff6aea2661981ad1921. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPS801949973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617946d86e9e6f52b48da9821869216f8faffdbd0fae2f098c0a68a947f2c16b. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/JPS801949974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c077b26fc4cb516fd6df2b5c9646238e8d016c851186d18b5f983b8f8a277c7. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/JPS801949975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fb31b348ef621bbc3be8e1d595289204810d05155ef1664c5192a5965c9ec7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPS801949976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb20fc90bc0ee349d52dbb8005bf93ef17e0e39edc684029aa7af36a7fd4ba50. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPS801949977.