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 0x264023dce3118790e0a0475a9ae537642b69551bd4432a4972e649bd7a55e1d1. 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/283780d2-d847-42f6-8ee5-1189ac2ad9f8.json and https://artists.proofprofile.net/proofs/artist/283780d2-d847-42f6-8ee5-1189ac2ad9f8.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 0x2f52f10af505287d05122a8c4e0b2754571c289ece83d261e5db12b3dcf0a1ad. 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/QZFZ52082369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7324c830093208e32910bba023805b9af31385c2baf1b488251fc504fdc9aaa. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFZ52082371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595a3da91bd763b1d7f0bc886300cb5ec963ea2ba1ab5c48e1fc61c8c6e035f1. 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/QZFZ52082372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67a68b0e35a9f30f368b48c559ba37af976afadef7e3e148161838ef528be08. 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/TCACL1615240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca11451d2131da7f1fa934c3815fcea59fd4c8ffe69833c92c1c60f895d4109. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTAY2287902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25bc2d722ea46959c33c5163b6ccf69fc58c0a3949a7846d968b38c9a63b95b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAY2287904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329f30fa6a455f4f7759ac3877f8b6e64c6fc1e06a3a3535deb00540cf7b42c0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:11:10Z), 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/QZMEP2132574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5885921ada607ccdf48e1ce830bc8e55affaad93a1381844ae6f55d1a1acc088. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTAY2287907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88efc673f752061a9e178cc7e56de6c1d86fd0c738d514bbe8aa65a7479f8cef. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZTAY2287910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd352614fd2f3704b8aef61290351fcaf25bc8731efd99b8df3a9e98bd0d6735a. 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/QZAPG1724464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7490056799ebba16e7d72b364c4048b2837afd1e702a999aa57aac9b936c159a. 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/QZTAU2129295.