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 0xfa86247db44cf4164e3d4c8b4e1eddd508a7a9a02f990d8c9109a9b3552cd863. 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/82fb8387-7072-48b5-a4e1-3c7e8b91eb35.json and https://artists.proofprofile.net/proofs/artist/82fb8387-7072-48b5-a4e1-3c7e8b91eb35.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 0xff5b9ab96e981240aa7260c7663b63daafaee1d6b8cfdd43ae709c9ea71dffee. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/GBAF71500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b535d1d820bb63d6b99f152aed655055cc8029fee4f0c3b07cbf9acdeb0baa9. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GBAF71500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91078bc5d07d8ac121b6b17bfa76e65ae16d0276680dc2e32bacaa6b7a2da882. 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/UKAF71500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e09230d5078752bdbf5de6343089551a9583ac5faeaa5362a8d13ffa798809. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKAF71500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853bd9947a45a4ce6c1df14ccd18336848263fcd8d055172bfd0f18498e4e0ec. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/UKAF71500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06f34ccef5d2073a5b6dae79ff0bc8a448d08eb43ac7cdab9e9effe7de87dd0. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/UKAF71500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef160753eab32db6d3b96b9e343688cfcaca1ac0aaab1e68ff52abf47ed5bba. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/UKAF71500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe354503808f54b3bc6ffeb6b6993c88da3d6521394511605bb7f3f0c62021c04. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/UKAF71500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451aeccf044ea783beb380abdc9972d743a4c9a723299764bd62920f117c34b4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKAF71500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4f0491f0125d421fb7af86847f46ff3004df05df8beb601af532df2914533d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKAF71500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf339dc513a0b94d64833f9b0ec64ece6c6f3b4425611b84315fcad0a1504a297. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKAF71900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5efe0d647157a1e66f12534a8d4a1381b5f369a49a64e64cb6c8cbea7e3105b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/UKAF72000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cff6d07ca320a12504d02e7dc0f58ff64f0ea646f15ce75dc5886bb4c9aff96. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/UKAF72000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d0c24374916fa8117157cf83f2daea2d18b1fb9c71ebfeaa4f01ef653475d0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UKAF72000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65484b3f2f470ec044ba4b306fc39fcdea1df6e375fdbb4556ff590538eedfba. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/UKAF72000048.
If This Is The End (feat. The Ulster Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e5aa71ea20b2cc3f6c6dbbf644a744a74d5e48bba4fe68854a15ae2da430ff. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKAF72000051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d41c3bf026134bb97d84066050269c43a9d53d98f886204703ac2aa27c0fa02. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/UKAF72100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3ccfbc6926b0039f0e8651790845a16cb390aa3aac65ecab35e78e1a3ee6bb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKAF72100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d41c3bf026134bb97d84066050269c43a9d53d98f886204703ac2aa27c0fa02. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/UKAF72100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e58b71b87644be38213543fdf1916eea7a72c2798207a642eb6493596353be1. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/UKAF72200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ec1321cde90c6ae6ef704249db2a2ff561d359c69e0926a94f4224d1de69f4. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/UKAF72200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be51d9ad6e7de07fbb998bcbc6aa2395cbfa8373545cfe37ba99bf205aa8c84. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/UKAF72200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b57f065978dbbcb4e69a1a662a7b40f957ce138cd934e36c6e131dcd4684711. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/UKAF72200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a3a280b92ceb1b1074906df23253d669ced62525886062e04f78706df255a6. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/UKAF72200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4731f714a3f8ee3c226132c5e903eb6603e73e2b24235f3b1739ce06c0f6fe4b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UKAF72200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdc436a8412ae44bb94768e29eaa85af34c35a8e77a38b1546859fa598df22f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/UKAF72200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66af10d9a25153cb633fe7f12dfaa46875268ac9fba946d01be7eaa13e2820f1. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/UKAF72200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047b73cceec6f8c5fa9d772aaaefd5b3dabf9f31d9d98d3e2b67765a17fd6333. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/UKAF72200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c564522eb75ce24a159a8dd553c9fe30a42e4895cbf90c58b62c1bf20b735f. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/UKAF72500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90c1fd77ded0e3aab5391b8b6197b3661136796c4b26d810c8122cfffe74e5f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKAF72500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccd88cbef0802af40c6d5cdd4724f8b0886f20584592c4b108d05291759e830. 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/UKAF72500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b657acd024326e1fb4e3b7a8a5ad6a9b8636c07268ab057edae84f1f6d415e. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/UKAF72500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447243d30a4dd66211e17d33508948c952cbf4f8cb0ab8e494f5ca71d932ca99. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKAF72500100.