Mason bee is a name now commonly used for species of bees in the genus Osmia, of the family Megachilidae. Mason bees are named for their habit of using mud or other "masonry" products in constructing
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 0x8d655cfe698b0f412acd2d0585c973d5f3d78ae6e264ddcf82620edcea12054e. 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/af72549f-3c5e-46d1-8599-9d31d0d9edcc.json and https://artists.proofprofile.net/proofs/artist/af72549f-3c5e-46d1-8599-9d31d0d9edcc.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 0x2b862b916cbf39f9e7cd60dd470eccb2740cf1a25a7b0d89d3ce2e29447cf0fb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US3D32307602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16343b24aca693c152fa73d8ac39ffaef8be4ff7f6b862775282db99b1907b56. 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/US3D32307605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd1572418c770778de20f55d8f20785920313844a15df2e65ee7058b6b2a5d5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/US3D32307608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7858a7ae076c2646afe301b10a7fa78fccbe8c4ee72296fc47f0848abcf08192. 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/US3D32408901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd785e7ebc522d3bc35a5951043e41f8ed107e6c0d2f141e864798f905c9e887. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US3D32408902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809a8f9bd7ecaa19d74e4b2513ac1d880542f1405ac5b737b1ff30c433713162. 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/GBBPW2200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f5fb49662f4c54853cd288212f188898934d70d841c163113012cdb3573364. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBBPW2200079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115ab75f824363afcbf024d7b4fd783ffd92b4cd951ef1956aa65e46060581ec. 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/GBBPW2200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595efeca8a724ef9225d43262f71c8bba23c786fde01d5e37186e2e5040c92e3. 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/GBBPW2200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a89e4affb7bac6630d56b0141d3d986474bbb416fd2cb6c3a794c656f5d985. 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/GBBPW1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc941d47272144c55ec3ea4ec036720a2ab5cc9ebc9933fc89bc50826712b4705. 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/GBBPW1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7941321bed28c40f7fbe121f5345885181fd92c5bdcce402e41dec4a249fc2. 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/GBBPW1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda79a493c10348234f3c60d555d640b77e3e5d4f541bdbf2923a768adf0fcb9c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBBPW1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a33bbae42b2f38d558ab50525e15dc979eb09afc933e7690a9dca9aa26aa36d. 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/GBBPW1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7766d8dca20b9a5b3cbe51e1b299a87bd8bd50eff813e08f2102ebb239ae67f1. 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/GBBPW1500321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c888f59bee8f777bbe911c083de96a261278a03a26519c450b5903dfaafb96. 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/GBBPW1500322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981394715e5843621270531da95075a9ed5f7a00a40cffca6a971c0d17a6222c. 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/GBBPW1500325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff90fc6371d3fb5c47f07ba61b69109ac43c1058237a8fe206d5818e6cd6b34. 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/GBBPW1500328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac195a1ca998a7fd391b23a5af630322766caf56b13155a03cf78843c0eb7a6. 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/GBBPW1500329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fe1e7960188afbf0387fc9fb9ec32504d83c010e0e3fbbc1c12699fff17315. 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/GBBPW1400060.