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 0xf7b0cab10cb4b11117b6c9882bedf1f88b259fa27998a1bf839024831ec16370. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9b77c23-7844-461d-9c1c-a3fe96a0e092.json and https://artists.proofprofile.net/proofs/artist/e9b77c23-7844-461d-9c1c-a3fe96a0e092.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 0x9f56e3772fb6baaa444e89236cfc6c561eafed0777a5edc228033a873c2e7346. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZW9L2292072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a87e493c5ba1371b31c2bc93d5140169c937ef4668a8f08fdacbd8aba8f128. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZW9L2292070.
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 0xd4fdc26e05ec0058d488a0239c7e740476d64ecd9d56526b240a6b3573eb8306. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZW9L2292071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c85b76ea04aae4ed503bea1dbdd593a5bf818279c9c8979d7decf32767f349f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZW9L2292073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb63b2b30ad019b74bfe70d440510d1e7e084de8e7e557fd6a55c6a3042a728. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZW9L2292074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd221a01977bdfa8e603450e87facabda41070ce23363c2cc8d09d22428741b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZW9L2292075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f8b28e93546a27de2f7001cc265ef5271060d684aa236ba502b4b1107bdaac. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZW9L2292076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7309a2878a3f5d812f3bc716eb0838bed311ec853f535126d8bdf71ca126fefd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTVM2376117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c5edc69e54d212b7fa97ea9cff688fdbf90197fe03c93515853abb0d116c23. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTVM2376119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bc0812c04a1d2aee945b152fe48e92b409249cecac21ed8eae131e1d9f4d2f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTVM2376120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a72b5251db9ff6fe9e171ef92cde585ac5201efef5c0d66aa80bef02fdff161. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZTVM2376118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835fffb08be80fa3f554000d2d97e5fb8710c7ea99eddb6ed6704fd12f39676b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZTVM2376121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e15195c9c75cd1adedd548f0f2b0683f3ae6e3410d504fb2f33417cb51f1e86. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZFZ22414810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fda537e33c8de330bf9ad88f67184d7fc844effdcef2ba5403c52743323228. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:32:07Z), 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/QZFYY2478727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ec234e581102741b2df99bf045377e38986bebae8d82c16f8bbe6b4595c4ff. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES52442171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83aff0626cc88e08769568cbcb60a93afaf74bcadd0360b3db23678545600f61. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:50:01Z), 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/QZES52442172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64eb4781cbd14fe822745fef6f577868f40640dd7225a82dfe3a64de24bf3d0f. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/QZES52442173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b15bb7e62f610c7b1f829acd16a3ad62d40383a432be991dcc5f28ab0c39e9b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZES52442174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6feec12a0bf2b4ae906a006bc7e49b32a2a3665a0ce78566a6b69329631518. 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/QZES92498353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bea9eff4884db77b26085b7eb33da94a43d877fe2ff3e287227614b552d004a. 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/QZK6J2454303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f9e4247ccc5a0cbb441573a898ad6574138f96e22ab60ceead928eefe5814f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:27:51Z), 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/QZK6J2454306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cafbd122812f765847581379bd9e7e8309f6f977b7d130a30961694897a90a1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWS2433936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52236a1bc90d7adf016386f2e16958c435aa8b656da1e2854f05f77187bbf300. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZNWZ2459799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031d53f38a99b10996011e73007d69e992e5946037362f3d1558e08036a6343a. 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/QZZ7X2434317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41da9f7ae6811ff33578fe5928186151c4923232dc2bc7fa602fdc3921b7cdf2. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7X2434319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d33634342bd4cc3da655eeb63a37936dff9f978b53af55d13d2e176d2e3ca85. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTAS2339261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb16edca7f12d9564e227f056567f3ffa33e0c6e608bf2a8245a0d23ddf28cc0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTVM2382244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24971eb3825e1fdb471f215c1d4bad233b354112ec92cd3f4d9af75099e688cf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWDD2386657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f4418b7e2fbb49862ef488152edc5f2a154143e03fc1b4f3fa2257224311b5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZZ8A2488126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9daf5873b25b3675fc6e5a90af16e6df998e528d7a710a33ec5d9590f53c147d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZZ8B2412643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83f81164cd7948311cadba67035a9d913f85466dbcec50fa65a38e75c3d966a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTV32506685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae1cf73deec57869d9925fbbeb6f7b89dcb181fee905964a965e989c5a013ec. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZZEC2321090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedaf21927827bba40b7cd6648c3e4f689b0f6cb75f1cf8d2bcdab13e9513b3e5. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZFZ72408684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4b5e9209f2d9e7c2aed22cad6a17b393e74c4a8e0d1127ddcbd8eb2437d825. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBMA22330309.