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 0x48ae9bb52b844ec2603e55cf2bf5ee95ae66a0eb89154bd12dde16aa1ad5f6f7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de9ebeda-2a11-4e31-a1fa-d9ac4158b0a4.json and https://artists.proofprofile.net/proofs/artist/de9ebeda-2a11-4e31-a1fa-d9ac4158b0a4.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 0xbf5e064d18015230fcf18596a7ddf97a134bb2bef8a8fb58d871984a03354876. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:05:43Z), 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/FR9W12137561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f50aafea475a722bebed23ca5f3dfe6e7c98b1cac5644a448220afa2492037b. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FR9W12245796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316f77b6353c26acccf985c2df389c0c607578d9df23c606036e5c2cbe4ebcde. 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/DGA052301187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc72ff0e1376aa54d433f9543cb3bc4302e493a72ae17789e23a5b695befbfd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR9W12348495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79446cd1a886fac21bdaf9e6fe3010b67b36f70c693e8af8d3d17903ff838d99. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:39:25Z), 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/QZWFQ2468682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcd8cb1c791824afc93e54325acb0742c189f0126cc0897df8d43453f69cb33. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR9W12503872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54aed56c0c7a55babe0fd86b3ad421826e21310fffa93402d16dfc8dbfa733b. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:36:27Z), 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/FR9W12503873.