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 0x395da40200c8a7c7d58cc7b08c276fa8f14a31a3d4745abb0baf794974dd5db9. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa5cc47a-0d52-4b58-85a9-95362d798ef5.json and https://artists.proofprofile.net/proofs/artist/aa5cc47a-0d52-4b58-85a9-95362d798ef5.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 0xef3b58042eed1114348b813ead787f63409d1216f52c450a61cc00d95c5f1ef1. 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/QZFZ31948661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405be256b41745d7e86138c6894507d51ae5f52ad69419595856f7777a10b053. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:10:38Z), 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/QZK6K2052835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea00c1e481a5a8640eea7531ada4a4c1f9bf3a9c42afbe60ffef45faa5f2bb67. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QM6P42139707.
Nordista Freeze - Jam in the Van (Live Session, Los Angeles, CA 2022)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfb9635acbab3e7944f922049ccb607114c00698671707fc8fc080690e4bbcb. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZHN42519375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6fe653054430111f20def52345df8f5fe5e9e88c9010ce56311f6d2948dc5a. 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/QZHN42519376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b291397c81bdf27ea160a30f6b57d9b1bea12c8f177b12ca0f25907b61f5f2f. 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/QZHN42519379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd2039b616ec92bf9a7f753ef1f4fa39734976caeddd472ec62543161fea80c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN42519380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e74ba76e0a888c77c6490c9a519c66408cfc483dfa3333c100a3209a17f2a66. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZMEP2512824.