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 0x04a7464466c64e15c54a5d6753b7dbdb6c677bcbda652b9b69268918702d6579. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b09a32e8-28f4-4263-92c3-492caee8b281.json and https://artists.proofprofile.net/proofs/artist/b09a32e8-28f4-4263-92c3-492caee8b281.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 0x3c17231e4b134b8819a8aeabb7c6f4ade90ea33ba782266d58a073b54775d321. 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/QZHN41995440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7537676bed5feab7fe49dff04d7973411046ac4ba7b9929ba0cb032b170bb13. 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/QZHN41995441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106e092a351f12a7ac41dd369257771db24584aae3dde97ceaaae0649bda971b. 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/QZHN41995442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413ecd123dbf365e16d8f150dbcb571b238be507f9a5db93559039ef568d593c. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:22:47Z), 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/QZHN41995443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b93b27381128c477594c0973f45c992d7fce527d8c117efee384e3a7af71dd. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZHN41995444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a82cda5fea352677d5c5dc2186dfae10b76c8f60ee940c110065949d68577c1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:10:50Z), 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/QZHN41995445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a949929ce64c4bebaaf791bcf2bc1559d68105fa8e5d94dca89f2e83a627d5a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZHN41995446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d61ca3873bb681528b494a52f377fe73569b4f42551ca2334ca862e6c00025. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:34:53Z), 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/QZHN41995447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f3fbe876920315ddefd49eb913aec1e89d575a5def52765528b9c5dc357b16. 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/QZHN41995448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ced1f4bc7c538f8c5e2d7274329864605f5b76a8b7e86cdf00dd7afc9a53d4a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:58:05Z), 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/QZK6N2012349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e9bd58f1b840b988ee5a1d6c4b11ff44f6fd361e419f65544906fdc6747bb8. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:52:31Z), 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/QZK6N2012350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71421146935815cee1e37c2348110e5ed1911600a43ea90a1864c5c817b160ac. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZK6N2012351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d56b9977c26cdb6ab29708927742b169dfb0906384ef6f863bde13b8f59701. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZK6N2012352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a09606cfc6785efcd815944309668f53d2bc2cc76a1db8b03eaa735f6fa3511. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6N2012353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a49fc977a8d9d47469d647d1ff017b177f8659b3c8c0e5a529dc43b9c177510. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZK6N2012354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f1f6c35b072b981b7bf6627a61ff36d9a18afd4ab6a8d983acf40ce96ebf90. 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/QZK6N2012355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134472d05e5a4d8b7cb1075ca72cebbfbc42a910925b0617f80c301d59db4ad1. 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/QZK6N2012356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbe0fa1795a36a699b4c8d55ee4781effe1115d15886d73c8ff7dfd82fcae40. 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/QZK6N2012357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa356eb84fc3745ddde02ad516eb50ebaa97e2efbdea7997b60f0ae28a1bf85ff. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:50:35Z), 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/QZDA62168331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef9ffef2095c27b8d6eb566363ea14a94c47274e220ac6c3b1dddc01c07149f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:13:31Z), 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/QZDA62168332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6664ae5a6be88f41f3593545a5e4cf28ab33c142ab45366786314f7f04c1e2. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:36:21Z), 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/QZDA62168333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617d4f5b9c9a5ead360f3d9802be4051df2125aef87012ccf8c1ff3710323448. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:25:56Z), 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/QZDA62168334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986783d3ce2e5c5aaea2f91057ceffee5b3ffd889d892c8f927e1153e9fb88b1. 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/QZDA62168335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed373e104a7b67a72acf48fa16cccb24ee4a664ff63059031834d92f7c59426e. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:12:14Z), 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/QZDA62168336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424afa49c144af9eedee70f0295f50ba99d45ac5c5c36393217cf07314f774ed. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZDA62168337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea7a27f9db5826159a0278318fe7f36d95fae31f342185d226c4eef0fa75334. 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/QZDA62168338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb10049351fec2ae04e9be38461cc6c651cfa778742002dd5f69d78191cc51f3. 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/QZDA62168339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a34cebd963b9ffa44ccfeb863d72aeeb5ab859caf08285182fc63ff47645fbc. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:37:19Z), 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/QZPLS2149590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db1ed2bf27cae96c8bcced4f28a3d405d81c2cd61c8e657edcd3ffd9e096e55. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZTAX2201450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d911d0040a3cbfff52e682ee747c32d7c8b959bba14efa3b6ae296a96ca345. 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/QZFYY2327375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3950953466e8fd4a21e55036c9d7290b053ea8f4e63b336e27a9143d4d52fadc. 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/QZHN92337540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e4e64adedc9f5464ce620b247e7bc0bffba60802d7fa01f9bddbd1dcb4c2ac. 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/QZK6F2395175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe297d72717aae1f1bd3a255cfaee9040af3fb6a26b824857811f31279ad60af7. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZNWV2322458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad01f016d369237660086a5ceddb34cbf75cab164a06c78fe013143ac97cc267. 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/QZTAX2394107.