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 0xf87e1d6384a7cef729002548425260268b6cefcf40b209307ba80a296eb8002b. Chain 2 (Bitcoin): anchored in block 953875 (2026-06-16T02:12:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/079d481b-9056-4df4-9927-ac1492c4bcdc.json and https://artists.proofprofile.net/proofs/artist/079d481b-9056-4df4-9927-ac1492c4bcdc.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 0xcd7b5d62e2ce429c77838debaec871522e2bf85ea5f6ef02c71b6874f597fc2f. 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/TCADL1814711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf863a875eafd9fc20215d78628107762af84a7ab88a5833bc54827542cbcf3cd. 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/TCADL1814741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc381a1bdf0bffa4a7cfdfaa29d5c68d75b1879814aeddbc0a3ca5cd2235a51b3. 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/TCADL1814851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645c4cc6db25f5b64562d4b11cb2d3ee66dcc14dd75a6d85e17b996f931e6903. 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/TCADL1814733.
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 0x6c326353bb9218d86cd8d5a7dda1322a29fa5fc81ccbbfbf25bdf8d1318b27a4. 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/TCADL1814750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648fac3f9a63c69d5dae1c0373d0d47670bfc36febabc0ba54b9b5796c5e8dbf. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/TCADL1814786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd91f96428e2363a259ea0ce836ffda280975e35f4a4f56ab53242a9e192576. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/TCADL1814801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2b325c360a45355acd9b1765f7a8a34194bb012878c54b96181d22c3891671. 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/TCADL1814847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb864a0e69fba12f7ce4c05906a36407e73ab8aad7ddd6f943c6a0bc7e74b92d7. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/TCADL1814887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d53936b025f97b8542eb2ffd010e09c4427ac2fc63ddb85513481f42727e786. 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/QZNB82259477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f24a650bbb2bdbe1bb8d244ff223701aca3d4ada656f52aada81a28bdcb741d. 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/QZNB82259478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe882726131a024992fa11d3f10f71975ecd8ee6551e553e69e3c68ce1681b108. 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/QZNB82259479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb612de2d58022f8a4f51d6061dbaf6e420f95a82623f904c9e3acded0abce95d. 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/QZNB82259481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e40fcb6a978c07f684e0f02e5fc09d1dc9be5659ff1c5f18df8eb3f6be6991. 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/QZNB82259483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefb3783eff849a67ad4ef933e04a954e9e2b016a63faa06f564fc9aa5d93873. 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/QZNB82259486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604e002d3f9149e0d68343de44bfaf890eb2ec328a7d934eab570672e9535248. 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/QZNB82259488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3506e136aed00ce245c405f364ffc87b53ce4d155da26444064e2918ca05589b. 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/QZNB82259489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcaa2a77218236165c4b8cfe2e0c9d489bdec60eba34f201d042b87d77dc23b. 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/QM24S1810238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d0bb38505108c4097c777e0253c6b3c0831e0b328853eaddf56aeab1a5c714. 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/TCACY1787083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d453122dadcf7ad8e7bc21073eba89396baf8625551b72cc5b8d0ed50b7225d. 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/TCACY1787085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260df379f6e01b7ae0a745f77620bc89caaad78584ce817de851878befaeb58d. 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/QZNB82259480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97a5611cc79c0ac451301870f781007c4d9a94314bfd6507386c7d517caad72. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZNB82259484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932387cc9f25da9835e12b1977792616920a2fe7739b30f56d35a080c50ad15d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZNB82259485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b466b0d0ff7507fb90a234bb1240b15b299a827bbc803ca35d1a126bb083f38. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNB82259487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d3c234c3e7b8902f0fdb585ad204d0c38c81247e2ffb1d1ff35c0be2ee44ce. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/CA5KR1839693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2029a15e5c12a1d820491cbfb2a3d6dcb4ad99370a27cb07d71f7d9031ba1099. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/CA5KR1839698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052f8fe60ddcd01fe1e4c7d54a1c1d202200391d632d603c3f1287c5b6eaa385. 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/TCADD1763051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25c23941359beb24f68760b094c22870881ee7e694d614a95a5012689845ea0. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/TCACY1787077.