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 0x81a6d2854bf99fd9fe7cece2450276d8219c5bf6af8d4165377278b1d3ce69ea. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bfbcbc7e-5b8a-44a2-977d-0d54d938153f.json and https://artists.proofprofile.net/proofs/artist/bfbcbc7e-5b8a-44a2-977d-0d54d938153f.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 0xbb9b960e93e997e28957867ffac650377381ec45ab0916782019f2aada5f233e. 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/QZMHN2266620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f61d8809071712c3f16e220af36295a6f05fd8d1ad1a6a763111eb09eb75259. 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/QZHZD2114919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb895bbb189f593e6d667965ac353e8e859528d36199bea16bf756ae5f3ef9539. 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/QZS642240254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d6e888da0f69eb0d7b37f8f94405eef904010ab5fe5476181da0f5087b3883. 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/QZK6M2406705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6a14faab0f1d3dcebeb1e7b27d9e2132fc49c9855b35d90abaf5ffc6a0e8c6. 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/QZMEN2547898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86f5b7ea76d6363a22136134ca1274518cc60ead038f8b7be7a94d6f3e2b8ee. 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/QZDA62528523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dc5c8ba4f6c73e25807ee243c19c96b667902dfe5d5873039de773a3c3a887. 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/QZZ7W2482888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ec7209de9ab1ad18444047bf7e9558b91b74681a4295f0f0ed137deababb67. 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/QZZ7P2464736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d30c86426fff33533484b77f52245dae3469dba89a7d4ddad84a9eba66d53fd. 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/QZTB42419684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49745977a3379a4476ce0a85efecb0ebab4cc4db5c54a506240e2d97edfbef7. 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/QZDA62487631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558d5700794e73511716050d1c2be2b1051e14ab9d4e65a1c4fc238a3f9134ae. 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/QZTB22385577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0d7c06f9412c93cfeaaf9fe04a6acbba44b060f28dadeb76c997948bc5c19d. 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/QM8DG2339387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe214e35b24c3ea5c04c6eb60025948c1a053a2cfc117f23700432cf9819b0812. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QM8DG2339337.
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 0xccfacda4b8799055af2a98cfc32bb2aed2337674f66a0b49981b4569b6cfb1c3. 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/QZMEQ2393560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95856d0f98a7c9a46c8ae7e673b70e98439197831e3f8a2710087be3b76d1dd. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZTH92319554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7134e95653eabf75834633980a0696da5aa1ee3aefd8378d4eee89677f5ee7f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMHN2378270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65597009fa7e5fb6caeafa57948d04c08b1129ad865045bba2baef9000f9d424. 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/QZS662259611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab76732a599b3d11811e352cbd376a1b7b2403d849e2d4ab7288ca6110545849. 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/QZS632221235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b36e95ca2db87455b7b0fcddaf6feb80130033d2faef0aa811fe0afe33a077f. 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/QZMHM2273708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06548089b81cc5178b5ed37b40579d36ab82b9591d78eeaf40b5c9f4b350566a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMHN2222340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a41919ed3503566d819891d49b13c817c357df27c6f78b7f0d286561016c295. 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/QZS632273552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531ef086315c02954023e44d535fcaf21335d4d9c1a17b32cc007abf30be2ed8. 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/QZH5E2229042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82aa734f89c0d2452e23df59bf1e1c3cbce1e078f0289e33abb9af51534e7130. 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/QZFP52273983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c5b1ae6d353f182028a2aed0d16424f02524ad688d277e53d35d57a6d4faf9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T17:00:54Z), 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/QZS642260431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b28c023d77d76d293172d300f2841e016070494ba9443880dfbafe65da38c9. 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/QM42K2237199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad14e3ca7984319e84eada59368795b0c036bb8d0118d03e69feb4dda2ad5ce. 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/QZKDK2269761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cce22fd1b3c111f5f946348e0f56ae232a8bb0e72b06b6a4efa18d38b4c2f85. 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/QZT852154677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777513bd872ca9e088e30fd189b2b76240bd26a2e45d3a8e2fee9ce96d344c68. 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/QZDA82349099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4e1bcb0c4e9df4fa870f542d2d868bf0c623f02760c8051647d97200d6d5fd. 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/QZHN72358786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd7700ffc748170f0701848a6ab8ef500edc609f46674aa6fe0bc5fc2cf7384. 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/QZHN72358787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9012f1b5decafa5226104b5f07891af871d0018bb7a84b9420a3136782abb0. 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/QZHN72358791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654a2656ece75c40c2cfc5c758b1344b6af913cf38b1e7d8c7198ecc875c8591. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN72358798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47f3b7930368952db74dcbbe6004bdbe6b08f44c54eb43ddc66aade779bd17c. 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/QZHN72358793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456c849d4cf58ea1ef5fc36fe8df3996260dc5bf79318670ac17d07515f3ba3a. 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/QZTAS2343178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ddf72628f3288ab53c567383990d8843e03d16f70ba11d8c602427fcda3167. 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/QZNWW2276463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed5857cebe072d9d9596c8708fa113dd78a4d8fb905114e3076708d394b21ff. 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/SE6HN2403762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370d776b9ff225290d145111b399ba783b5aa923a9c110383b7f96d77d492a56. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZKDK2375363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5695b813334418e9cf8399b95f01cf1cd94cdcfdf349578d29b2de3351a8516. 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/QZNWY2293312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0417af9e568b4673cc29b7a0ad2fa74f6f1c50db77962a6e1534cd9a77208684. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZES52391827.