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 0x329e606b8808f9253eca1d46124517072f5e1bab204e36d92a2aae51621cd1df. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b2fe5b1-2f7d-47f0-89df-7f203ff9d664.json and https://artists.proofprofile.net/proofs/artist/8b2fe5b1-2f7d-47f0-89df-7f203ff9d664.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206ffa30c62ab76247ada76af6a0e45ac39b756d8ee3dc765e94c5eb7e571fe1. 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/GBSMU4320861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ca15110e36899d60660f2972f67a00b162cfe7e63aeb96ad12f1be688100bd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBSMU4320862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb86593176ce3361cd0c3500778371c4baaf5eedd95e2f8b64e2e43a5150f7ba. 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/GBSMU4320863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14efa9e2d02667a7274b4f60a8d16fdc39c4959b255896425127bc0c3d5df866. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBSMU4320864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc190a7d0155fc2a7693f2e802fd081ecfe29ec1b88df5ef84d4fe23237070f1d. 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/GBSMU4320865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4502d61901e9aa3071cbe72218271979fa792facc261fe2ba6a738c8d91ac5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBSMU4320866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf03ef2f7524a8ed7367e26c5cf7885d7df86c4ee17c3f8bdc00b55afe27ed2. 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/GBSMU4320867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243f39225df691eb68204aefbcb8d778f4cbfe5d0470198038f88a64a63a5ba8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBSMU4320868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54bf878345fb6d6342f0436f86503554c421c73058aec7aa626b11f57aa3588. 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/GBSMU4320869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddf41fc36a3cbb9ef1492b2ace12858c5e31963745ab0bc83157304d2757ab5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBSMU4320870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ac1a4a5c342f808938178dde467e2d7732e8576f152732071f0a8966eaab93. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBSMU2509982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc5b53f2a3c853afe16849a68fb7b8f62b141041f8543a37738ba374bf24148. 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/GBSMU2509983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6e0b0542925e88b32cb1c5b5a1bba288fcfd47f7cc1f85acafa76bdb63e75c. 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/GBSMU2509984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a162dea54a7052d6c668d6cdcf95ca387b333c4e7f71feafb25c0a235796609. 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/GBSMU2509985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae42a38bc5131da45af9b972b571c0be944069297621b289a8501e0e5f40adf. 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/GBSMU2509986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ef2a6829ca61688063d18071fc7f4a0c26175aef45825a16eabc3abb3c3298. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBSMU2509987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafe9c155a7a30addbda84d9f2bf0c7aa079e568461b262b99e6f134917fb206. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBSMU2509988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ff0c42277c190a1d4e27ffb424f1873e61e7d70d58700e33a6783ff61af491. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBSMU2509989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec128c4ac8c51455e4fb5800f3ee9bc804df4df66d161525b085d64634db0fd. 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/GBSMU2567232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7688c8d4de7d5e0945490dde07e0c7973eac19fb0842a78d48fb45bc6d9568e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBSMU2567233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f13f47b87d2aced226650f95eb53cffe5975de3bad1716be83d59c8c6ad593. 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/GBSMU2567235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e93c0bcc2791698faad3e4cecdfffe2ae5fa9b0c4f8c5a8f2b34ee25293bffe. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBSMU2567239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611c89c6581fc44c16eaed1fe2d3c8954b522f5f37627b4789d8e11b4973987c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBSMU2567240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9e8df6a7658e15b8e451a6ad4d625350e4a8aa3b351db3ca6732f977a9e5e2. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:55:50Z), 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/GBSMU2567237.
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 0x03035cadce25c2491f2a276d67a4b7ff0cfc66efa5ef1c77fdf96c3ec9b5cf4e. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBSMU2567241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ddb3665902234632ac0e454e9fc4fae9add782eb793b37e25a51e8ab53bce4. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBSMU2567242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb93c420029f440a29bfc10d24fe96149171992f1220fefb4aa77299d5f84e4. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/GBSMU2567231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c3e74c4c2cad8d3d0ad09a65b23e1f8787332c3a32a94acb651a86c6b6c21b. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBSMU2567234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481671aeef28895d13b1700b564e030830cf1476142cf049195ec2dfe8dd64e0. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBSMU2567236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1ace0aef2c717c45d2544aea95350e43769195110ffb24b17b7b7bd13c3f04. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBSMU2567238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bf5489ab9551403e38c1e2fd1aa5a05d85b2341c5a9f854e93c09b230ff164. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6K2002916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4511b57b2fb18f1de233035bfa397cdeb4fc980b5ae094b5b099a32efdc2e4e9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBSMU4046542.