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 0x814fc55c76bb374e38d2e7f488e25f3b07cf1d2779c08bcb132404fcc34c77b0. 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/b39af9a4-0480-45d1-a3fc-8d6678d4fef2.json and https://artists.proofprofile.net/proofs/artist/b39af9a4-0480-45d1-a3fc-8d6678d4fef2.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 0xb72d3d49528751624fa22e60275013459af0b0a1ebd615cc47ce339a02091a6a. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/TR2081500139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5995d0b26cbe8a9621b8b2c798201db3fcc8fc11555493c3388d5998a8a227a3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TR0520600109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582659e8b6e054553a9c188aa44142e3a77e803c77ff8d90c626568bab1a07f6. 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/TR0520600111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904dfc6c2c421a53b9d8bbd41a58b89fd3505631a61a3cbd8bf4df8b66ed4458. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:08:31Z), 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/TR0520600112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe8662cd79ee16bad0a32b71d8d8d5032e8087d6d435b5a5c844d549a5f14d1. 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/TR0520600108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb583c01e55b9c437015eb449fc0af11fa742e2deb949ac161aa40f0ee1cb177c. 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/TR0520600117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2eccb3acfb2b75ee8413bc6b6c5b059061e7b0b38f0aa7b62385d511f8e01dd. 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/TR0520903867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8341ad48a934855835de77f52433079f376826932e726aaad0c5ce1cc038ddc. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TR5600700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27741d05e08e5c90044d76a5e9c38438e313724b95646a0f729422bdc8175a3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TRBIR1900258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3727f7c543036efe613b590f1edb1c148bb727013ec367e4b9871c555ffa427. 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/TRBIR2000544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61006556954a2b9c15590d4c40bdd1a8d935dea50a59adbead5c29d57282cec. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/TRBIR2100725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb14ef49436d3fb1a6d692e608f0e64d327598b8f24f7eae94b3ee19ecd253d8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TRBIR2101035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b6759d511490c574d90adfa9ae37c7adfaa8dc2cf9ae4863910e3f5517dfc5. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/TRBIR2201257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf12ff99ae4c8d6034644de9a85012792c460b47beafe40b8ff2d8c3996a011. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:10:54Z), 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/TRBIR2201327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb401b8288be93e701a905a54cdefe51b9a9abb3be3e1002e8c4a79e8024a892d. Chain 2 (Bitcoin): anchored in block 957723 (2026-07-12T15:34:17Z), 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/TRBIR2301623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823ab2628dbf2fb9b97f9dbfae06cf6818282df5dde2c1c8be672759eac64e91. 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/TRBIR2301874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44bebc05226699278b4efa418d57a5dae70c0465e806f09d2a3873324688aa4. 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/TRBIR2502482.