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 0x43569e1beb39b477ff2b1ae01056fae243b77166ae428923814862e7619d6a58. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62ca26f3-9e6f-464e-a470-c46520002a6a.json and https://artists.proofprofile.net/proofs/artist/62ca26f3-9e6f-464e-a470-c46520002a6a.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 0x454d1d8c8e88393ee4200d14f87a553caf4bb787f6059a4760cb79574de0d4d4. 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/UK6822300926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763aa0f486726eedb83e4fb68ae86a1d19a1eb1422a4c93a9e4d45aa3a22b1d5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UK6822300927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e6a190aeff7b3bbaba9f8577763277d61c44859371faeb924b7b8a9daf52cb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/UK6822300928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbca4cc89ced758639ffb835007ccaf7fa3423655ac6484a5f296db67f864fe. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/UK6822300932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150735542c9158a9a53bfdf2936d161074350cad61eea133f5f38d99ae4d097f. 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/UK6822300933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d110decaafdaba5df83bd62a2457ea02b10e4021834a4ad7cbc19ddd614c12. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UK6822300934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230f7725837546358903ec2a2ff1e6a116c373660fbffed32bae39601a8b9975. 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/UK6822300929.
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 0x51f3389c4ff00543b4b75f37e77fef23c28e0c27de069f9d6a4d73ccb64b739c. 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/USDHM1902512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16477b95e81f9bccfeb6e9098cc1e272aa559c9371636d5b25cfc5bd064dc502. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USDHM1902519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018db6b1df0bc1906319f786282b581062f438e67d732359f5da6078c3cb1fc7. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:05:04Z), 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/USDHM1902515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51825c67ec38fe6dc5158ca5574be2ba2c46e2f6c37d58c4d935d41281784aba. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USDHM1902508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d2df14d5c2d037f8f66495ff4dee2840ffa442f33ea4b36b6682c6b0aba3bf. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USDHM1902509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabade942930bf9e48b1ad09c70f2d05d939d79530db32abd300d697a35fb074. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USDHM1902510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6a6212db03e0a44c4910985346e6f992899e95fbfc5953e9e65369852e465b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USDHM1902511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f3739f2c76190a1392dd841228387f56d598e38dab644d509cccf40a266f7b. 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/USDHM1902514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe517a06e0369fbd2131d529f6a3394e8acbe9d99f46f6cf75f452a36f1be6642. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USDHM1902516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de78830cd23e060c65b50b55d5a240c59c5a76c6af5668480fffd7f3b899b1f. 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/USDHM1602090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758cf3acec2806b7e124caf469b261cce6dae8f17f192f1661bcfcf1c80c4086. 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/USDHM1602091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f890cd2cc94c2dec8cd6a52cfe69f3ec03a62476482d4daeb7e45787bb6c432. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USDHM1602092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae027832135aaef0350b1142eb0bc17acedbeed507610239b57d9c4327b77c02. 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/USDHM1602093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ad8b6a5bfb1fa13dc672ce77b0dbc156b7cca6cd9d1479ae51a09ea01eaba8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USDHM1602095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a578fc5d14a1e886b4be7f2e38e74b3b3e21bffc7f536d59a20f95ac254ab31. 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/USDHM1602099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccaed1ceaeb95fa0c537e38712b22f986690a9190a6ce6cb661ce6c61d408a5. 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/USDHM1602100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10bc620fa11962ed909b6653c13ba5710bcb922ad991a5e5046fea635234850. 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/USDHM1602094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fd0b2b688933ce030ed31fa4372ad6f84b4bcbf428e2992343abc0eefb90b8. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USDHM1602096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbfe5b43bdb55a014059f92f9b1bb83e5038b7c41a740907b9a424b1da17f93. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USDHM1602097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3918151e6d78957be49ca94a8768c9093d371e04f6ef09015ab1fdb8a069ec77. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USDHM1602098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6253c7a6d689124c0e302e4e388f1edd8fc97a6d4123afaf59bcd6254b2012c0. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USDHM1602101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a38c4efe25fe518227cd74e2983e5c57216c024eec6e61d524f7dbcb4b92738. 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/US2Y30633537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcab36e034e9b8c225651660ad2846090aa34c479ff8258950f30871e56fa5cc. 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/US2Y30633529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e085f5ede49148c7b613dab88107c08ee5386d365cb0eb0a180919ab55cd3b. 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/US2Y30633534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4156359d0a2217363933762c4c962d7224969892dcf9b4c4b95a5e33c61f1d77. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/US2Y30633530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef53440456c22e5bc82dca6c152aba21e2a46652dcf22479ce1b34d6cff2d58b. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/US2Y30633528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f87d774d5a31e99b445283a17cb30b2c4a4485db56115c56c5843589dd47a3a. 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/US2Y30633536.