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 0xabb4a56b921f9023714852b9060067afa88ae766008ba9461308c7a191ea430b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef8180e2-a8b2-4ed5-a74f-5334115018d5.json and https://artists.proofprofile.net/proofs/artist/ef8180e2-a8b2-4ed5-a74f-5334115018d5.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 0x2a32aa5a874efa4c1238f5c5978836334b9d4bee2f4735b412038cec2f29fc9e. 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/US3Z40407545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f7b991a819de1cb62b17c8952254fa60d4b10a95fc1922a3df1b8084902cd7. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/US3Z41100385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce38149f63da80c5b77de8e380f9a4bdb61c7f9f147f3fb1eb8a9aa1049da7d4. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:33:27Z), 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/US3Z40407520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bd02151978ac938dffbef78b56a5ff54a8b1c2b4f26f655969f04b3e523788. 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/US3Z40407523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcda60e7053f1d17097b6a977633c7c0c056f90701802cf78192a8e0e98f7c22. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/US3Z40407525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8ede410f12017eccb884a0abd1f7242a2c9e4c8b7cd350b30fcfd3e2ec413c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/US3Z40507498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a994fe6c5fde5941b37a301dbbe0b16cace32cfe3fcf7adcc1fd2251c76ea4. 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/US3Z40507499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95780a51c617d8cab466de176140648b7522526d1fa0d252a5cad5dd360df25. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/US3Z40507501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4018f76b3065349f6ee683e17399ad806dfd88b11d8354b477750b4330804ad. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:57:18Z), 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/US3Z40507507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d6fb16c6fb492ab893fc932f8e5f50f0752b3fc2e6d6ac5c662c2cce9ae3e5. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/US3Z40407542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741f55b1b38a1321539cc3e61ed41e51b97d2c5e40956ee6b223fb11b59f2538. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/US3Z40408131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4aa4efe32ea36f3e0be42101612e71796d5ec6c3f0b796daff2e3fee8e5156. 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/US3Z40407477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5cf7e5ca62a0574e3233b54d820ff2820b6f19d8202964080d366673b23f0a. 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/US3Z40407524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4010d5eaff058d0e31cef7aad716edd027224433fa8e21ae5d117b14b9ce6ba. 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/US3Z40407549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcba4f5e0f756c9951e8fbe26d115350836a70afd6bbfc7e82cb51299a125f31. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/US3Z40408132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ef43581209e055e2584a75ae4661e2fd8612f87b58ea454384030040f74d60. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:32:11Z), 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/US3Z40407505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee6f3c9f82fd0018ed0784dd1c0954dd01413b7cc5807d963276c271e60abbf. 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/US3Z41501613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1335ab0b14055259e89da0bc52dc41a9d0b3a03ddc08c1bb9395c0eaf1ed19b8. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/US3Z41501614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30962a4b3c97ca35e927f8d0fce032c5aec47bc170951c29a3b936a254118307. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:42:32Z), 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/US3Z41501615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fefd562c8764641852c17e993d2ed377936c3f9c27650b02c96a934e714c25. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:07:45Z), 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/US3Z41501616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f12516d918b2b5eb009751fb36c6714661356928723a6a15c6728325c342f18. 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/US3Z41501617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c09a9b371c0fac7889b503f1b2c86b3ee78313af27898b68e0cbc07bfeb90ff. 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/US3Z41501619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e5a72f4301a68b4d3508a6e00113231b6781a6ff1cee8769971e2e6d6fdfaf. 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/US3Z41501620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a42c46b9e6ef193a130f1e3273cf4063d2f682cc336752ec4fc5bda3768c4ad. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US3Z41501621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54e0ea69d394237af8a1571820231d66f379176bf5932a3f7b7e8dd86e90b86. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US3Z41501622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54306628c9d3ebe5a486bd950e8905ed2e5b8c1601ac232dff6b5c14488492e6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US3Z41501623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63674806f12cf57ac23d121ff3a8ab29e6da91189473b3df05303d81ff07cc31. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US3Z41501624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7376daf0a0693c1a4c68d30182251fc7e7ba3247f786d31fe5dc67e0017c85. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US3Z41501627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c33b8d949634cb4e50d6a6b951991b5832298676610c50259778c5bed2ebb78. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US3Z41501628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2725855e46125ee668ea49847e1a57028a125c467cef9750290cdad3875b9d44. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/US3Z41501629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae137eec2e17d161acda918dee206a5027a62176ce0a6dbf7d86a374e97700ce. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:03:03Z), 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/US3Z41501630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d455410855a4100a43b4fe962472b275680687cc4ef34bfdcbd939aa9ff0996. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:57:05Z), 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/US3Z41501631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596062dd0852d7cc1006185ef4771a86d2f98d61dad57d6e82e275dac8d7f8bd. 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/US3Z40507496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbab38c1bf0a0102c77578c6712b337210b0df7e3a21e663c102bf74f92158ca. 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/US3Z40407479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c0389f69afba8b4d46dcbef09981f57abeab7c1781270b83c410ff6e1ba7fd. 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/US3Z40701055.