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 0xf11340a2481716474b9701ed3055b7bc11b23abc24ff25456ecd295877227a76. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc57fdd2-3fb0-45ba-b4fe-7019b2acd1e8.json and https://artists.proofprofile.net/proofs/artist/bc57fdd2-3fb0-45ba-b4fe-7019b2acd1e8.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 0x2a6e0d823184959716f672632a12be44a7607b5ae1f8753e789997aad2fa9766. 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/GBHLW2401089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4932e77fc77de84dfbc52aab06fa66b012cd6f070ce5d6c43024685351e06b. 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/GBHLW2401090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d17fc5fddf368038b07666dbd9c6350e8cf38718d0e54a080189461844e629. 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/GBHLW2401091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23806aee5436257a0a4d980ba7b8c84f27e248de26de668f0076f5350d452755. 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/GBHLW2401092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89d01c7056725ac3cf956e7ca6e77214fca59fdbce888a29aa94a4fb7f40576. 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/GBHLW2401093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4ec852414a4c41eefd85637ea56a10ca4e567c3462938611a4ec5ef32d7011. 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/GBHLW2401094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5c03f2006bd35aeaef64d9266135502ad97530e2d980d0061535edb3dc9740. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBHLW2401095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f722f7f0d967234f644ea84e3d1f1e25664d589d7ea03aed5212d6f498813e4. 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/GBHLW2401097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8600621d2684472e3470631af96b2be340fe220c08a5a3e05fb2ff53eaf9e45b. 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/QZES52225475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd224f794fa793b9149ddbe4d523ef5d880bd148965f184000f56eaecd323bcc3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHN52211225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ec5c9265570938e1edbe828332bca2c595c048dab1304088f466faf2fd314a. 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/QZHN52211226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261abe6fdeb612905ebc4bfdb33d784480c5a286d7e231b5d01eba1283a4de23. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:56:40Z), 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/QZHN52211228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30d38fad9e661c6606d08bf8d10c8434a2c613df08e7a8ec39b77c1cff0c8ed. 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/QZHN52211229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1f0c04e2c94786fca59b8fdf7f518527655977a3a9c0fee98959c1dc5ff103. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-21T23:34:47Z), 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/QZHN52211230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6e0d823184959716f672632a12be44a7607b5ae1f8753e789997aad2fa9766. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBHLW2401089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8600621d2684472e3470631af96b2be340fe220c08a5a3e05fb2ff53eaf9e45b. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/QZES52225475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd231fb56930f80caadf683dab30b858f44aba215ad9758786c816d723202703f. 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/QZFYZ2235628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9a010b88c0f355e3c78053485f10540da0904a0426054e8f3fca95cc26c0ee. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFYZ2235629.