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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9125bb86035f3a13d615ee6b348dd174213be6f808d0bb37b9f7f9f4713c3ce. 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/697fbb1c-a9c7-4113-b409-7e6208234c2b.json and https://artists.proofprofile.net/proofs/artist/697fbb1c-a9c7-4113-b409-7e6208234c2b.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75755d9a89f484029f3a66c8294e5ebfeba4e6f4a5969a8377519f769a7eab72. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/FRU702200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917fc990c61f95f6143ef905f86e49fb311cf1ac7a08db54d3b258771ec31668. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEZC62299416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737d4c01348f2428139585b41295be4f0521787601e695bdf76c75cc25136282. 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/DEZC62275645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a26ca43c2fc8095585668319b9530182a00e01424465099f8bb0295acd7a00. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/DEZC62299418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c32a95a31e8316e6bb6ed63a5322261820a19faab76a13a9cbfdbbc287d9c1. 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/DEZC62299420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb771bc99adb57ba00975af7c94c31a478b39c95622b5891c992c406407a1f780. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEZC62299421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c8bb868593833c31896a8d5d03297fe9b781ee7e52e77bd843164fb7e62fee. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DEZC62371884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c8bb868593833c31896a8d5d03297fe9b781ee7e52e77bd843164fb7e62fee. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEZC62371884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d89f07fed91276f8dd8d8c536b45d1014286047b16c3bce7fcb04d085549f01. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/DEZC62498511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8a36d49fa10220992baec723f47c193cfe4a8a288fec6f87614ebf8281620a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEZC62498512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c8bb868593833c31896a8d5d03297fe9b781ee7e52e77bd843164fb7e62fee. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DEZC62371884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcab6bea10d91c72914ff4d52d1b999b77f6b0aeb9174afce9293919927bb566. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QM6N22592038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a88a4bde1b96dc4e21cfbf614d5384d8f3505e57bf6c32c5190ea861932ce4. 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/QM7282506480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcab6bea10d91c72914ff4d52d1b999b77f6b0aeb9174afce9293919927bb566. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QM6N22592038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c5148faff8c9e9508e231eaadb4ed73f8354b839f97bc0713ff9e1ee30cf0e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEZC62295591.