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 0x6695828b80da65a6840c8e7bdd9f894b9a6ca521af62234a9aad07e9a1a8a0df. 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/ce9b433d-b1de-4d1c-bdba-14707ceb6eb3.json and https://artists.proofprofile.net/proofs/artist/ce9b433d-b1de-4d1c-bdba-14707ceb6eb3.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 0xe7539756f0d7bc44d73853ef297abafde8a012c3f5f220d371217481820acace. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCADJ1772800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3094399ad2fbde720c9749b1770723a271b00799f2231ed199e8aa671497b0e4. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCADJ1772807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741911e4592912b1c62c9f1289efca41a7b2823350c310009f921968a6765a06. 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/TCADJ1772808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3870ae3fd6b696f029b618ee404d4deca4dcde3d29624ee84a8139f05bb4fe6. 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/TCADJ1772809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4587164054fae2d9310640701a5173750d108a0efe919ae502ccffdda67c35c. 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/TCADE1772883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09c4f85572d4a0249877ee3f3941b6ab189c0efe74a8eabfd9ed2153a1988d6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCADE1772887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588e0c128b79c2d77258d3677ec9fa922dc0ef0e1db9f7e5033e9371077c73c3. 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/TCADE1772892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccb44500d679301871f0f964c7dc9b48e8b7b49e7de1dc0866ec5df3e56e98f. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCADO1810147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263f67f23af2da6d01c3243df73e83c694b7bca755e53c45b98aa5699c3fa797. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCADO1894586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ced23351c83836dd184e2f9f8dc18b36f5202d45b31742939fe2560a928e27. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCADR1828031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a1b7fa2e0746958cb9a47a7f57b653bc92bb81ac25d7186e182b066c5b454b. 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/TCADR1828033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fd84c25a6d5f0cc67d412bc28378bf887c3a4dbf5c9807707558ff8e405fff. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/TCADR1828038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463bb49c0071dcbc3294de8888d88f86cc0c5f3f61fb78bd4e6c730cfadbaa88. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCADR1828041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4e67994ffae02ceda78b6b1a57c81be0cddb57954e2b959bf998e9ed3db236. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAED1947582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de23d26bbc7b2a6a8e6042355ab63c23eceee351adeff7a3b012fe6957d490f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAEK1962374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b286e93ea312d2e96dfecbcbf402df1f8580278e528c473b013bb1a1d91e208. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAEK1962375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d082e0208ec6d60a7b035955eab644e1ccbe896b0441f7f21936d7b0a6965c7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAEK1962377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803e32d153ccd39b32d419eff7d1e590e8aad9073329f7c66bcfe2b3314c156b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAET2084667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373de07ba6d6c72b22dab0fce3a6732fa9b4bc1be81e69044e116936c41f8323. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAET2084573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9005de9c955c3a8a4bbd462e75cee398275a4331bcf71efdb323369dbae3dd2. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAFE2085024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ee911f692e8b75a425b9d6d50f8face0d6c9ce62a213f2a002ce74676d1957. 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/TCAFE2085042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19685f7fea79cb41b5744f583feeb62a9ee533682081215745c763f0e787d25a. 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/TCAFE2085044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f9b03a5e3e1f7d76af583693553eff7f3823a020ab4f19d0d92f5f1d2f8446. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAFN2127843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98ab88752faeac9cf23e904a43c9cd4d0c99a93540ab7c6986775ccd3375e8b. 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/QZRP52294681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd302ec8f949427e41b5d89d9d22d819d258771a21267d9012f444bdb7e971d6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZRP52294685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eab6f00aeff79b7a62aca7b5a613050cc6955ff22e1f8ef5ddeabfc715bbe84. 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/QZRP52294686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6899eaf4244041a1fd1614c30368770888d34c0d1a6a8c7c23bf6147ae851c2. 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/QZMEQ2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa2f4b3b7e788babf97b26630b7dc23aa824706392bcb61e346ecb53ca7b63b. 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/QZMEQ2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a5e76e1b2f39dad4aebee0b73b390f95a216ff427cd916f21b0cbdcfb8d755. 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/QZMEQ2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bb5a9b4f9f3919e66ae08d59e3ba1dd53a38b43683be48622372ae5b6ee9ed. 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/QZMEQ2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbd7280ee8d8f5823e73cfcdf3b4cfd5c9e9dcd88953c995696a60474f09a5e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZMEQ2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366fc84b079b4b36947200ddf5ff591bce16d11615fe641c90ea78387ecb9162. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZMEQ2400013.