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 0xbc338014b48c0e9faa41b1e22e2f1f79b101a46a63d0848cd23986e2460cf0de. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f700225a-d73c-4cd7-b15d-46d6763c9970.json and https://artists.proofprofile.net/proofs/artist/f700225a-d73c-4cd7-b15d-46d6763c9970.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 0x21eeccc283e613efbbec8fcf31487c0a90509bef1533eb6f7aa81eac3448ca50. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEBL60702557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652e1ce3811abbf6867516e631cd6e4114525966dc232d5db574d60f6b2155e2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:40:54Z), 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/DEBL60702558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfc6e1111192cf80290d38d78e6271fc563c9195057d75017c5776b30143b92. 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/DEBL60702559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb590ed702488f9ea239ac3df6d6354ec5d18476ab5b1a251e87d98519fcb8568. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DEBL60702560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e90a5b199bfb55dba4760fdf4f87cd7121356c188db942a12edf457f6b6c75. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DEBL60702561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a0858de60159ebd31fb3c4d0c48259e4c9384eadd144918d5ada9de616c3dc. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/DEBL60702562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e807685b779c611f96ffee67039154dd58065f41bba2b0ba7cfe71a469ea2e6. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/DEBL60702563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9449073312524dab72c039ad51c9e38a23ebfd45ef719f970d5df958aba2bd37. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/DEBL60702564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7587ba16fb09510b1869fdaa0d0f84c0b483a0b7e9f8a389a51ab72a5e2ca2a6. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:48:22Z), 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/DEBL60702565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0676a0bc623b8dc71edc50f52ee8a1a0edef3c63230e1bc580be8b8cadfaff7. 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/DEBL60702566.