thumb|Main emerald producing countries Emerald is a gemstone and a variety of the mineral beryl (Be3Al2(SiO3)6) colored green by trace amounts of chromium or sometimes vanadium.Hurlbut, Cornelius S.
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 0x70b2aa4fb5629f27fb9c6da94c05daf40c361e50a45357e41b310099b0cd1016. 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/ef4c22a3-b3f3-423c-a546-dd2ef3401433.json and https://artists.proofprofile.net/proofs/artist/ef4c22a3-b3f3-423c-a546-dd2ef3401433.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 0xa95d3de8470148f2513d4dabaea8490af3c74375b1db9c6cae549035112de2be. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/JPJ591701412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b2629a7549aa7e2c6b42c26bdd72c8717de8bbaf02d7242fec47f92327c43e. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/JPJ591701399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dd7d5fc02b769560ff24e79468ec1765f80bd367dcaa4892a90299443839b8. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/JPJ591701401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4128660aebe9463d4e1e81e9016a5cde7b90aa552d9a4ce2e475208f8969e69. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/JPJ591701404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd6e6a54d2a3f6e9743ad6711a068db76e0b7c8d545106cc5e3db032bdd3c62. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/JPJ591701405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3ef8282f89139d752a20fca2e20dc2cf4ce42f0920ed32e7a756383d6bf214. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:54:40Z), 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/JPJ591701408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39563602df3d3892b39d2a7b4407b3f87c5746659b0fdc50db269c9b1589018. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/JPM791800214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7a3a68aaa28f991015a442333fc601442235c0c9cf8aab8d9b1282fdb617c2. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/JPM791900137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5038482457db9dfabc0e04dcec75e655e9fd5f3d713691d267b8b6bebeea4ec. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/JPG102401394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5a0e0d5ea285953f5c8ab8e85ffc1c231b7f105fb4f7f90ca46a8f6664e8b5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/JPG102400800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad9b675f8956bae1965756a7e45dd53b7da815b715d43ef70d0348450112ff8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/JPG102401630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8be29386e664d9cde76f091387b72a803dedb09df30c8832657c44f280da7f2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/JPG102401633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c710d13d8dfbf5086c88311468b3908b25c00730a0b66212f1a8b570e44d67b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/JPG102401634.