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 0xba3a1d7b75350ea4e414040e223c4eb3db65da4869a99897718fd5fb8ef1c697. 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/28279cc6-c871-43e5-b2e1-4eb46d579ff4.json and https://artists.proofprofile.net/proofs/artist/28279cc6-c871-43e5-b2e1-4eb46d579ff4.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 0xb6f538f3c5feeb1f09b6dd2f88d5c4359c818ec8dec824ef23cd952263ac0a06. 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/GBLLT2149258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6606eb7b009ad97584495f76a2d6ccab51a2a59a47a404cb3dd5c4535adccf98. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:57:01Z), 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/GBLLT2149259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44371fe4febc15fb32f469ad27463960ec0cece37e1e986c35e98d68f89f1dfd. 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/GBLLT2149256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1c4bc4e2c44001da6bd9143ed395fdfe306e2124a895bd5133d1652e40ee9b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:34:59Z), 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/GBLLT2149263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d02386b0ddc14b2517ad1ba568a33d848b81e15b799df4f03bcd108adc90366. 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/QZFZ62500395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef67661a8ec6a15a85ddaf9e51c99541d4a171e6540be5f0b8261db644c0692a. 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/QZFZ42553032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac1e2e37724afb4884e0a5b3bae9cd8f5b6a1ba3249d65ac6082960868d3211. 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/QZTAX2220060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8491dddac1c17302a1ba6a2a88fedbb00af861f618e254a5365dfff6d2c80aa. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:47:27Z), 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/QZES62308127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcd9ab7b867a9c028ad2eca36225bf3403ab79f4dd47397ede65930feb9b6bf. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZZ7S2433259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6caf45de97eb4e06234efb103d0d74e41e185d13265572e73f183a6b95b6d37d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFYY2534091.