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 0x3b0797872a3ab9141930b4dd1ce00ee949ed4d0a621af3e771b88117e81c1cd6. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02ad3b7e-9e59-49f5-aa65-936dc92cec67.json and https://artists.proofprofile.net/proofs/artist/02ad3b7e-9e59-49f5-aa65-936dc92cec67.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 0x3edbf9d7f5853dd0e3618539543e784ace78642983db1a09b429f30ade12f924. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEZN82531385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e77dbe4199dafec835d339410e1efab444fe6d6314385821f4f241c1f49f4c4. 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/DEZN82531381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b864c925d9b2999ada763b2eacaef7aa671969f12103fa81d7391de5650d14. 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/DEZN82531389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b635d4c94ba57402f355fe5ca56cb7efc4051afdac3ce3cf031383048be8411. 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/DEZN82531418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdc141b1e07d6c706f7e49f5b4b0444f7b59073dbe5324121672f8948ab9d7c. 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/DEZN82531403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26f0c7162721aa6590adb5320e5012645c53336a34add71c94f4ff9a5f6312d. 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/DEZN82531325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8c3e5dfb01ce9c2c808c6c16a735a3e07d3f19cb64ccf38a8b6eb289ff916b. 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/DEZN82531370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00437a34184178c8e1ff18aba039bad7a14cbbf55d0cd7a49b7b06ca2cf47170. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/DEZN82531453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d179ec565b9af61f88a0abdc51f17d9c2ba9422ebebf5d82f1926d0562f0a7. 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/DEZN82531338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51dbff6d845979466c6731d303f37cf00b71ae5024cba6c64dd7d66713f3111. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/DEZN82531337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bff8a0dafc93926bb0b0d4e500859f33cc5c035db9a6598fac83e20865207b. 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/DEZN82531429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3134ff7516878808bbf56be3c899a7a40260c23a558cc2475aac0d3c0376076. 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/DEZN82531377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b206cd8b01402acdbb14108a8e288d162a4271acfa19c164a03477fec03bb3d. 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/DEZN82531308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc654448818482d77f85be922eef4ef42c21514faba1157dedbce3846ecda5057. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DEZN82531475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0eb70d1b1b126af6efb7ad25f5aa3ac20a5f01431fa10a087b5ff394dfd88a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DEZN82531455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fa94cbaac4ab8bc97301cd353af7a1b1f27cb685d510ab8b3fab75bb35137f. 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/DEZN82531363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ccb1ef8a61441afe3aa657d87f2207bb2dae09278f70035963e20df13f2259. 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/DEZN82531410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b412295b94eed3148cf9cbfec5369284198d8f33a577e6ed571c7b8d3c16a4. 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/DEZN82531314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885f339b47c8e2670128f53405df56d7807be922807dd2e544b325b4dc3cc6a6. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEZN82531354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1ca429beed6fdba848a824fd49f834af02c5f0ac5cc354996d419dd98b93be. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/DEZN82531404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c30bb857edf98460c7b04a4d8e7f7e92c43216319fcd0f0dfc106f42000caf2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEZN82531324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7081d8b4ad8c03e141f0b2097152a57253ad1ef24167532f3a4350c304846dd4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEZN82531443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c67838fb4c5c96332d8172b68e09e3a76e5fb00096772a702310de024c6a454. 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/DEZN82531323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510f8302ebab8b291de7ce9a2d74bb62e88da1fd2175dc927b9bbb8ac1b5b2ec. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/DEZN82531530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd5cdf017764c661f6cace111744c8de73390a6d8137e275f6d96a294e2fd38. 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/DEZN82531315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4630d7e22c3cc0ad9e55b1320f4f4d6721fb788dc5882eadd5119de05fbd8f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DEZN82531332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f8a0731ab698cbd4847010f97761a1546ac13e7e79458962834d51baddbcd3. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/DEZN82531512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4755cae5983a39647200dfcd9d9ab0f3214fbb463953417461a3579e09b1076f. 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/DEZN82531333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a1eb68df481d27c6ffd496904c968a71a3010f1bb69c32b18d5b3c729ca38d. 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/DEZN82531345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b67bcf5c516a68da7b09cde059426e4db15d58199025222ffb9cbf6e033fd6. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DEZN82531395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424c0c9d6116c9ee9d511bbd8dad5f09e5de220f733db7fa30ad06df1fdb72b1. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/DEZN82531346.