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 0xd0e99b73cac446a49973cf771686c7cf14c9384ff572f3b0056110de9a79e829. 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/e4cf9bc3-cc7b-4be5-a601-3d5cf1692d28.json and https://artists.proofprofile.net/proofs/artist/e4cf9bc3-cc7b-4be5-a601-3d5cf1692d28.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 0xc5582ce11fe7af8159c99085e204cbc00bb61a0a123e866e5e98f0fab923aadc. 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/CA5KR1959400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9d4cbb2716a5cf39e38c8458620d83cf7ee02d4f24f5583dee55a77ad25686. 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/CA5KR1970886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba574bcb3c18401836942c11191d9dc1dac61f1e743b84b56882178d05ad19b1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CA5KR1984463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcf9c29ba59bfad7430d9aebf0b594fc23a551f6e3f21489eab1c182ce325c5. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:32:42Z), 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/CA5KR2001478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520a22bacaffba16081f45b3bcf275a93204bea0e9998e9a0198d6eef0071014. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/CA5KR2049911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcc4efe0029446975f6804019b2c92ab561d187ace9e4328e45efd74445c7cb. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:51:18Z), 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/CA5KR2062371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe578e0449da9bf439d65790168763a5fed8e54d1d0142a37c2309e2fa5f8172a. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:40:21Z), 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/CA5KR2089122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b30e5a9457e19fde2311c74def8c03d8a63f15104baecf3c193f9068c8bf49f. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZTGW2100771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8c5dfb4fa11645956f316846762a02794983de8ea5b94b1fe2620680945061. 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/CA5KR2298040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae6af302dfc7583097f64d52a5401fed93dfd2ce19ff3b6910715cd368927d3. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/CA5KR2298039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8c5dfb4fa11645956f316846762a02794983de8ea5b94b1fe2620680945061. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CA5KR2298040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe578e0449da9bf439d65790168763a5fed8e54d1d0142a37c2309e2fa5f8172a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CA5KR2089122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3158079332d7df817a628a95ddc916474debe01f1fcc29007eca97aef71cfd01. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/CA5KR2044406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a07a5d305f7fd8c8da390afd8204a71a11538177a006dc67706bc6a331174f4. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/CA5KR2276988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b5f36671007d202a48d1cd38a5dd7b6c76066747c013212469108a1175e980. 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/CA5KR2335693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08adf8b12dd85aebad90d6ccec8bb821ed1f1a00f6bcbe5a40ad720e3c4d0015. 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/QZTGW2400178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec922a1b89208eb3d1cc129c1c77e20935e258c9b169de5d35a1e69ec55931b. 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/USUG12003645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937006e385eace9caee5c8905086d9c6377341de8cd1986a77fddbe4b5539e1b. 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/CA5KR2154435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfceee437d7da9ae2018c370909ddd2f29baccff7e67e0284b9925803134ee33. 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/CA5KR2072412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5061af35284260a0c3220475b4913d9019c8efc51f98ce6c79b17e9d969b8b61. 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/CA5KR1972758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282f544516dda4c6f0d4694c6f9d405ef70e7824155884674ac6dd9f76694e15. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USA2P2155981.
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