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 0xf0a0503c69e283d49e188fb58df0eeb24bf022dd94ef4cac314a99548a0c8056. 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/c862e163-e558-4383-a950-e1dc44e31f89.json and https://artists.proofprofile.net/proofs/artist/c862e163-e558-4383-a950-e1dc44e31f89.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 0x80dc942705de55fb83db0e2438c6b8018bd20a7e94f4edb679bfd298cd80ed3f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/FRX762298312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d41f6b408a80df7b7ee50dc48bade994e9d6dfc297a5725b66cffd8a4899c32. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/AEA2Z2357767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88244392e606d8969c02385999da11d43562f7e5ad767a986591bab388aeb0ba. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:52:33Z), 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/FRX282545242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c7e018f61a17ceeba43224dcc045cf5e3966db6bcd482cdb84eb0c76adde40. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX282545246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62b3b36171c5655514d4c25671fdafaea7eebd602dc470d61f21a3e6d68692f. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:33:33Z), 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/FRX282545247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3e10000381b889f31eb74da570d4e5d7916b50813bdfc58c80942b7113aabe. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRX282545249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d45d2a6105b73d68ae22ed64ca7fcba2fd25039a869e7163291ea8971e4ca55. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/FRX282545250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33dfae25f41d2cbaf587e5764a327eb02d6f695818a06106d39d597c7027bfb. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FRX282545251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b10584a04c9862c02f63e2371a101842df9fbd38391e068caec335851d18572. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FRX282545252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d2a6011ee24b109e4f5871a9c024a4de22a9e03710b77c58a661741fdeeaf2. 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/FR10S2364074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37751b60e2db49658835b9e664f2ddbb53f66255e004d5fbdc7e6bfb6d8e428. 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/FRX452269539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3515df35cfa8442b7432136c8cae6f5e49e8416cd9284e83f6c9adaa20e16462. 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/FRX452269541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd0230189d7f2c6e1c449fd24662d38ea09ca186a42e3216d850ac41812a695. 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/QZHZ52056053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24154906cb7de1748f0121b59b6881f7a7946f5fc41d1e7f60b7aa17924c0d5. 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/FR2X42199326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c8952b0500a9af8093f7d0387e80f174fa094df825bccf31f0107a7bd6f8aa. 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/DGA072282586.
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