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 0xc9e18fe1b9b4963dd29d8c109fe6d3cd60a50682eb75846446e11f59f49db9e1. 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/06324519-f69c-42a4-8efd-a837cf511740.json and https://artists.proofprofile.net/proofs/artist/06324519-f69c-42a4-8efd-a837cf511740.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 0xe687b4106608b9f61211dca5963f76d41e4589556bb9422981cfbd1f8f1fc666. 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/GB8KE2509835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872f28a73699e4d32a488f7972a5eda35348224991813c6ead8d2ba1cba0c1e6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX8LE2578997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bc04e1861d259e76a566dd4274995133649ba3629b317200e2a9b562e8f987. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX8KD2570390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197cc6f0ed44f6a0a214ee8ee0c9147a02f69f20d7fae25d993618300cad6851. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZ8B2471217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87b15be1424b6722a45b84e7d7f42598ce19f546a3dba7a0b28a0c680694a8b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CH7812418785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a77908ea352ce371b180b9a5a7dd8425636c4391956e60bab3f9f32513427ef. 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/QZTAW2460675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff44a570552dc27050f5a3a99cca624135f732afdd2a006d23e904969f3a1245. 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/GB8KE2414422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719647e1eacfa3ed2cfa4b8d2a2050a66d8911af705b87cd5d2ffd144fd1110c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GB8KE2415069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4d1d1454a8227c5570f2e62d7e095f3bfd6f5e154ada32839d126c2b4e17e7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWX2474156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0ee90a2940025410ab1d9f60c5449ee880c52bfa20bc823a4004f0e082066b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6P42441327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3be1db8efea857767694cb0a4d8fbbbd2f4d48d8f6d4aaa86db0f6fa0cf126. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QM6N22466236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689039596df91f3ec218705610391e65f5d048d6276aad5fd6d6235bca6de7a4. 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/US38Y2314594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397246b459382778a4e2e8dfce600fccae8eadda560f27f33365484ffca0f387. 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/GB8KE2326328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7952f86e76aa876988b399ca12dd4479677c20afc7092660e7bb55ff6ce2f145. 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/GB8KE2325375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b66c33d31c434cbc7aa6bd477a4dfa2acd1618e127ddd51faf7709a535659fb. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GB8KE2324107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc0134c8b175475743bafa343683c79e0425a9207519ebda3f982dd416c865c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DGA052327977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf465087d4bddb0550686b73b8dfea4441349b147dda580f1776a6ac308a40e7. 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/GB8KE2211828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2175ed12bb6ec2feec46192999d54ef537b282412a23a0bc3913593c288c07ff. 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/GB8KE2303499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59db884d9e64d6fc1df800d3db299375013b60563f00ea2712bf6eeb08da865d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GB8KE2303500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dc2795482e88fc48349df4f22edfb49ad060aed0f5244ad53c040294e63afb. 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/GB8KE2303501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe408d4832cc6194693af6b4d1f03b233db1a4de4f8a3d94b162f9924fc9fd53. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/GB8KE2303502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabc2a1aa32dad0b5dcbeda55e194d6cd7834951539e0543aca004f2d100f089. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GB8KE2303503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc694db5de6b752556a4d5737e93798949d7881850b534ac2888f811af9f9b53a. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GB8KE2303504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fffb7e952c0cc062c834c1d7b5e9658eedb30deb35e19d5dc505cbafe720cd8. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/GB8KE2303505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f481e8c3a7b454ed794332392db2d5262b1604f7295979b5cd94df6d884b23. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/GB8KE2303506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275330b7c0cb876e9e1a8a8ff2f00efd8692e8cc579d0d5b30c2d8ef4e3cca92. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GB8KE2303507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ba4ba5a7ba2474d1a3ee090b42c8a9a72b90411b5ca4a5267d75ff77f3a93d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GB8KE2303508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1826afd71a6bf79145d866de0716cb0a2d247c845f1352351e8a3b6a9e4b8133. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/GB8KE2303509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b7f884a8ae0753641af68ec0a3c1042014a4e662ad6f8930847657fc4cb382. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GB8KE2303510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319a0533b77a82a02a8a54c32b08d8cf517ebe5b29f6572d16864afff4d14e96. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB8KE2303511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023c2b3e093b230e0b72e92e611c56fc9ef8d3626710936b00885b3acb40ac5f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GB8KE2303512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960bc1436dea70f88f3a041f8dd2dcfbd7e8e27edc8448e928be16aaeba6064b. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GB8KE2303513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f52da737c6d58b14d366dd835bdf6bf64f23dc52219e5afe74b1a64db1d87d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GB8KE2303514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bba9146289a1d098ffe97a052ce1717a810373b6d6781df99104064e13b85d3. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/GB8KE2303515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcb470dae6fd1505dd525bda52ca7388faa0db39344e404244fc1ee0328b269. 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/GB8KE2303516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaef923f77a4f8f9182ae87f466c3ce4927dc36591ec9b45953964d2fe4a930d. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GB8KE2303517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b5bce9e6b12e91e512ef46e647f3bd6e057abb438a2020ff0d41809b150924. 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/GB8KE2303518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb986465bff9536fc0acd6a67a5fcc568475a872eecf2cedcdced11f6fb7c11. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX3HH2594820.