A bedon is a membranophone (drum-like musical instrument) usually built with two membranes. It seems to appear during the 14th century in France as examples are found in Jehan Froissart's poetry (Poé
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 0x2f8167778f26ae300915b28bf286292e35182a8e61a71e9a4deb2bac61f19017. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b45d80f9-6185-40bd-82d2-706f8413729a.json and https://artists.proofprofile.net/proofs/artist/b45d80f9-6185-40bd-82d2-706f8413729a.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 0x17d008b43f2d94b5850107a28ffb383f22cf3114bbf8299396954aa1bed530d9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USCGJ2373753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5988ad0a5b91cf075a0fb7faa8ff9a8bc85893987d6c11536fc1446e589fe7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM4TX2200803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eda4ed1664d6de78b254cacf46cfff779075067a330ee3ad2ebf9dec746e6fb. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USDY42335219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb40abd3424d4e2e63f06b35641b22f40210ff1e8b7d445da788d0ecc967f1d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USCGH2041582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae08febbb822f36f251492914e3742d086f07c9f133a14466d6b500818a83971. 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/USHM81878322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2f4dac5a1c9a5c0469cb1510441aec8d56548432248050af2d55beb6997957. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USL4Q1946272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c120453fb546256aadf8d1e374859ff0dbd961cb3e8974c2bccc7699763b44f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USCGH2041583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e679558be95769e4a2a9c0bab4e7a1a840347baaf82c691c31437599dc6ebe6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USCGH1922723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88659067218371df77a496198dc62b14b93e2153403885d549aea40e0c9a4ae2. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USCGH2041584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1e087e715a859e7f42f751a8654b58db0b226c700f82d632bbb5da874b4f3e. 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/USCGH2041587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5988ad0a5b91cf075a0fb7faa8ff9a8bc85893987d6c11536fc1446e589fe7. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QM4TX2200803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2f4dac5a1c9a5c0469cb1510441aec8d56548432248050af2d55beb6997957. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USL4Q1946272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbf1669a28b46172e237f5c5ca325425044459b404e5958311796d2acead9e5. 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/USDY41978045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e679558be95769e4a2a9c0bab4e7a1a840347baaf82c691c31437599dc6ebe6. 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/USCGH1922723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae08febbb822f36f251492914e3742d086f07c9f133a14466d6b500818a83971. 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/USHM81878322.