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 0x373dc8d15c45c4a1b26e7af96422c7ff8e8330464456e547c5c060de8eb8e737. 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/dd2e87c0-4a6c-4bd6-9841-89b4c0c43b78.json and https://artists.proofprofile.net/proofs/artist/dd2e87c0-4a6c-4bd6-9841-89b4c0c43b78.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Land of my Fathers (Hen Wlad Fy Nhadau) - Short version
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 0x7dbcfa95e55d4bb13ed3ba61798b604c072f6ca638def0bb105a5f2788a1d183. 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/DEF059930401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a61da9264cdef464d79aef36ee8531ea892b0134b58871b0b09aede6806ff99. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEF059930402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a635c80b9e6e52c4d947c48764bd9b68d9e34681df8d159d8aeceea8e644ac. 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/DEF059930404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3e53f9b54528f5c68d384d80dfe1e6b9253a597b475613bfdbddbf9bcbe64b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEF059930406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a622a1a78abd05aaa275f9160944f80fa0b6623fd772b63b9b83b4a9d6c6cf7. 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/DEF059930407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73541702e14a6eb3f0d8e188d5a65224645854989e791e005b7aa0b9bede8804. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEF059930408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c11190c50d0a73f530b0abbeb4d094bd927fea6040f97855be44b0b8e3e9e79. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEF059930410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9c966a8547d7d85ad112579b98ea02ba7c86766334c183c809e9306e17a6e7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEF059930411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a8cf6496494a59e0e8d8cd430d4ff19cc14588a37e0cba20ccd8410a2c0b75. 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/DEF059930412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c592698185f425c7fcc8febbd1fc54090d613a9fbd7917b99294d507a700d10. 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/DEF059930413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435a8cf788b4dae3dbd38ad93e2f69ab97d373348d385bc2ce318db9fad7f093. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEF059930414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a16f6482d2d2941c2e87ac725be0af9e677284e2b643ee6fe5576dcff46317. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEF059930415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52945fc13cb2672eded65cf9a3b88b45992d916668ab757b061e5e6c8160485. 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/DEF059930420.
Land of my Fathers (Hen Wlad Fy Nhadau) - Full version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ee3d8e64df83dc3882453eced3dc25caab623af6d1f8524ead130c12d5dda0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEF059930421.
David of the White Rock (Dafydd Y Garreg Wen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2da0aaf9888e8b6142efced2e90ce456103cbe01e948f025121d1e6f9dffcb. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/DEF059930403.
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 0x60d3c822f9c549de95ff8c27113d7854d86eba2cf67ef88f319921900ae07063. 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/DEF059930405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e173fb45741ab20f574af174056c867663e1cb320ebe485032c9cb8ee42dbd. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEF059930416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c0e1eeca615c244027edccad095e090c404200a61dd5dfd75a3f92cc7942e3. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEF059930417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d86b828e23a928482decfa8a8f2599048b13b901fd5b8172f408a3aea751652. 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/DEF059930419.
Concerto for Tenor Saxophone & Wind Ensemble (After Mendelssohn): I. Allegretto non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ec8ca3ced5aa54ad01b84dce373b97ecc38eeaa7410f921a166fc91e166cf2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USPMZ1915313.