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 0xe8707ce1d0997dfe0b10292840e984f95b0f9c2be287c7a7c56a7f8f7330b138. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a92325a4-4d56-40ee-9fb1-b45525266e2d.json and https://artists.proofprofile.net/proofs/artist/a92325a4-4d56-40ee-9fb1-b45525266e2d.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 0xffff55f69b3395b2afa5afae14d8321726b1c1d8388484a88b43eb052fe458f4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAX2277159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1742d629686c36eab79380d10d56dd4e2dfff93231046c3256108f7698467c7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTB32221154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ae37c42f142adf239646667ebd458767d93d9f2e22477c8ad8e60b001e0dd0. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:29:31Z), 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/QZTB72257403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dfc4bb382f491f849c7cf8651dd8aa2edc658dad0dcf1f26124328bd22f961. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZTB82219959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4c4f59b0afff1d13ed1dc9963d45d4823f3383ded57f9fdcb53e889fb4dea8. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:35:00Z), 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/QZTB82219962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a748912986109e6d0fab99b3364c9b228e7bab1a76acc7f48f73acb84a5a3d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:31:51Z), 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/QZTB82219965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95755aa382daa24a21646bd9e6668cfe8bcfc4d173bc680178773c25dfd5b365. 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/QZTB82219967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7972de3f744abf783bd211954a183dc5eaf1ed15625ca521434ca35543072bff. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ42350827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ed8c716e4fc548f791150416e7a5b072d8a244b0ff8ea02b30b4534909deb3. 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/QZFZ42350831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51018a4b2bffa4d3ef28a58be649eb5a0d7f9a8bdbb0b59acc7bcc91e7152ec. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:04:09Z), 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/QZFZ42350832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ec74a17c49b3ffd1b032d76161d2c591c8872372f49f4c102de2c5b6b6fc12. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZDA72348038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53da825a818fed8a8f7c1d0a550042cd9aa6bf8915b128bd698f555d3f023538. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:00:26Z), 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/QZK6L2363886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fa515bddcb7ef0b8865ee0f723b78c094a1812925b9f8432f34b3dc235ee6a. 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/QZK6Q2315838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6da9ca4af52aa0ddbd3e82a9df1194db80b185afc7289e6fe1622503b23708. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:49:46Z), 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/QZK6K2364036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fedfdeb53c37663a42af34469763f87fc9ba4605784fce3c35ed41843a3b5d. 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/QZK6H2339346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c66d80f9865da906cd088f24f4e340bce61132820f367006ba3de4380cc1d9. 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/QZK6H2338192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa68502705b0083af9f3c15dd8db97a83217551b1f495dc7e6dade70dbf618b5. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:35:42Z), 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/QZMEQ2397290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162d6fa402315664f160ed19742ad9fed45e58bdb6183d948a3f134737eea606. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZMEQ2396493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ac716308b7fa08c09337378c6685794b44152c85a1727e3c97069ccb9b54d2. 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/QZNWS2321864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb47c3cc0e57f27219d2e00c7b8acf1aa11bc4c12746eaa66b3d37011946581b. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZNWX2320597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e5ecef8762684c061c6380f264475b87a437d111ecd9ab9a07821d881aee0b. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:00:43Z), 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/QZNWY2311755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e1c95e21c57007b386d07eae6181edbf7c9d3a3568198386b7b28b6f6b132b. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:07:33Z), 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/QT3F32471431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b244808c51260027d82530dc5d135ebcd6f2e51cc871665ab203ce7dddae38. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:00:32Z), 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/QZHN52526145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c9ad2a56a6f152cbc0a97e61fb65641f599f5650582de2f54ff96dd3c8cdc4. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZK6H2570298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b94a0272b8abe4a425751b043db3754ae53a13c245653b203dddd7716250e8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAZ2500685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a486ece7f65c5d2d2823a08fbca093642f89de5815448c42b670790109addb1. 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/QZZ7N2577853.