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 0xae17cb8dc09bbb1a06d29e17376f083b21321aec6469ef16d696dd42edcdca35. 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/ba3bca82-20de-47f7-aea1-2f5eb9502d97.json and https://artists.proofprofile.net/proofs/artist/ba3bca82-20de-47f7-aea1-2f5eb9502d97.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 0x32abf3d284ce9166c37515b6684273208fbc5a1ba7e7962f7fdd0d46616fd520. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM81715200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd50bb8065af8ff531a93f211e9125eda48e4fd94bc570293932b8d86bd5df6d. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZES61862833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0b8544044c1e33bcfc6da59e3a599e6cbe1418105cdaa8d1e489ce6267dd65. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:26:27Z), 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/QZDA81980520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8424ddc4d6c7409e7e5874e6a4f883d037b245f5fc7e13fcc3e2b99bb3dfd92. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN41994516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb6d98326f1e509b6aeae62d0ebd9d1696179b042225009ddf75b45618bf58e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHNA1902568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a4f4c9774f7cfa8a8ca2bc5a5f3d482b82656b2dfea6e61deba27cd73e7042. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNA1902571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f9b745d44d170201fb8c7a8ed2cc0d7e4d4314e3c3a7bec9952a83a656fe50. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZFZ22026924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d1c91743b75efc0a1b6ea4f80a1fdd50d65bce51ba3f2906fd000dbcd61877. 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/QZS7J2159059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350f84fd6a61af1f391f8ed9c564918bc526fa1e4984a57c474c40f12973650a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZQAY2388201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd235e36815c85932b2c5f98b1b4564836e14e27dd4efdfe15076cfe89f33be3. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZQAY2540868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cebc1cb57be7d50f75dfb7cc76b2692553c04eed4f9620c6e4f11ef1010c8f2. 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/QZES92482157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8978454c9cbe64e26b26efaa15d19493470fbe1f23c322938102e594eca5734. 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/QZFZ42004478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ca2d40175a35297cf0733a6831c25a86177eb7b16bd423657aac5f06e2636e. 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/QZFYX1998086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ecdf45c95a1b938c3a0e7ad6141ba6a660c534b17756292c8d7e733431ac14. 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/USUYG1252726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39affd60766d44c7d7e267524cc2141c45a240a211af32303800adf9bc0a66e9. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCAFH2004833.
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 0x96ea7a01452d9d0815d15b254ad4ad6d773cb1086dc48f5c8f2f2b5209a90d38. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TCAFD2076289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0ce2a13d5d16654ab522e68aad7a56c1616d1cdda39600daabbff28cf772b1. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USUYG1334279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e6b8b630cf881394859e4f760363b2739aea6ab7fd87a9207ec827dfc2042d. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/TCADR1859908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97cef4540160f4aa84894d8c959fdfce6d0a2312fb40700cf50ec10d146c9b9. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QM6P41806018.