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 0x34a83f17aada24581d44d6102f3534e6284c6d8a6ad2d82e7c146122b73c44c2. 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/171082a3-f22c-4cd1-b1bc-e460424d58fa.json and https://artists.proofprofile.net/proofs/artist/171082a3-f22c-4cd1-b1bc-e460424d58fa.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 0x7d45dd20cb7d3bb3429231ba2333d9423b68511e33e1d933419c3fc93f9b69b5. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/ARK291200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0154278713b67ebeb7c0ab12e8048b7d88458704ab37e3ab58e5a4da276ccb. 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/ARK291200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336624058b8ca2d4e497e0c239bcc9942f987e45bad49fb2ca80f1db2f2ef182. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/ARK291200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1654fb07692e03220eaa9eb04a01ccd376a45d7434e5f23c7e2bf32ad8462754. 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/ARK291200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2c829ead2d9bf49d08d87380e2614f088e8d74e0199a8626931fdeb9d41836. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ARK291200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341a645ac069bd2e708ba2ce4cb158e33ab845aee6fbcbdccd80fe4b938d9da1. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/ARK291200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0154278713b67ebeb7c0ab12e8048b7d88458704ab37e3ab58e5a4da276ccb. 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/ARK291200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336624058b8ca2d4e497e0c239bcc9942f987e45bad49fb2ca80f1db2f2ef182. 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/ARK291200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7edbad8974d7c0bea52d8b3af2f08772ee192dd35a715ce7424939aaa2b8c0. 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/ARK291200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1654fb07692e03220eaa9eb04a01ccd376a45d7434e5f23c7e2bf32ad8462754. 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/ARK291200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2c829ead2d9bf49d08d87380e2614f088e8d74e0199a8626931fdeb9d41836. 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/ARK291200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341a645ac069bd2e708ba2ce4cb158e33ab845aee6fbcbdccd80fe4b938d9da1. 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/ARK291200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a50e01a980c01367360bee0f2090c0bff39bad6fd58d2e1121136717040b7b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/ARK291200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48bc2ca0846517fc974fe7c5ccea941c0bac51860661d20fc6b05f7319a457a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ARK291600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54305eb359b933662621fa0ad51d73ae1d03419af51efdbf8a6ee90c7fd8ff99. 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/ARK291600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe338b42ccea3e13cbb975d51013763905b4154b4df6d9f8e910949192baa433e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ARK291600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa031acda28ce5f3d5654145705bcec3026488db0fd3f70a6796970f6e5176c0f. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/ARK291600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd77a35b11f16b129eda4d1f6c7513f61a3daf0eb84535602644a2be501579e. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/ARK292000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c349d3d1a87cec1060fa683b25c5b8aca75ccf060ed9eac30ed53de062bbcd. 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/AR6HK2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c349d3d1a87cec1060fa683b25c5b8aca75ccf060ed9eac30ed53de062bbcd. 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/AR6HK2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf9d0ac0a2a11f3d5be1344ccccd6a48454004f8b7d42e7b5060c3b54e3f0d8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AR6HK2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28c14022567c2a99c61f956ef4e447d65b999e10608ae72820b53dde406adb3. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/AR6HK2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2445dfd909e5155a10261890bfaaddd9c57853504f48356ca639f212b9bb91dc. 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/AR6HK2500003.