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 0x3a98184227bb9118fcec82d0415b904a08d51135aaae1eb565b120922a22eca9. Chain 2 (Bitcoin): anchored in block 953875 (2026-06-16T02:12:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08163106-b9ed-4546-a311-fc8f929a3717.json and https://artists.proofprofile.net/proofs/artist/08163106-b9ed-4546-a311-fc8f929a3717.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x03d1fe0ae81bb82667cc8ef9f36bc7897658bdf8bb37ecb94f0f1d1cf6348f7f. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZMZ92215470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e9dfb3a7a929ba1fd9924e35866e297ef2fae459e59049b043d7641073344e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZMZ92215471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3687e3b6d705787eedd3438511a208b3adc5c54f95e67cde4b672690849202. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMZ92215472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e0db7a45fc7f84afbc5c9f122370b395eba09d15fb56c5729ff05a3ef1f94a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZMZ92215473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5bfd9359668e30ac54622c40da86dc1c64b36bcb703e7b639823fb13c5c39a. 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/QZMZ92215474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0045cb760ba678c33af851f1a80c6552966d1b5a06d5b965de7bc7b38a8eb14. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMZ92215475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04107351562c40fa7ca02ef52dcd2e16e02cceeebecd02dad6c5a20f4652a592. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZMZ92215476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eee85533091715f99d2361e180626333554401db43320fb256d23914929ce40. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZMZ92215478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7375342597ecf87c71481eb1dc7342b73130923f56f0a2f621751430227f8933. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZMZ92215479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da81963fd3c3a5785f0e9bcdc11dd99a13902253ac8d8dde37b694bb5fd8b1a. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZMZ92215480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cfb00ad7c5ac5e4c55bea088ca2e1b9ef8dc5faa6716e41ea4baeb404a7961. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMZ92215482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb556556d58297d4e33ee572e84e3d5d3243246798a936140cbbc49417da94de2. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZMZ92215489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea8e5fbfc482e6539744985f6bce6b0e1d04a577c4f4728328f727ebf8ccef9. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZMZ92215490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3d1ce9f0af278f6adb0c541f5c4132510aadca78661541ab075c711807fc01. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZMZ92215491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b29713e33ea5b26f96b2f0ccba606b0eb25f1b6bdd9cbbf806d6e3253abf7ca. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZMZ92215493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39025d72fa3327033a7c4c255f2b51a56053fe563c1ddc015ad6a8930e32ad05. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMZ92215494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0493025f71aed2f9058f1af9425ff5cdb51d542cd6131d1ddcc82ac616dc2b. 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/QZMZ92215495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6401545bc3b9400325ce08f986b4493e99209fe855d82c5e09e5967542da268e. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BRC9U1600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf042e75a74dd98362b832dd554a7f780c5d2678e7067a81cd1f8450044e14c1c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BRC9U1600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3510cc0dbd220914700f75cbb875c3da70abfa9bb524fd6620ac69f79f0a1772. 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/US7VG1329010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdb99226efb1d3ea77fd617f25d25bdc86575d3c6972ba9fc0db34eb85cb8d8. 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/BRC9U0600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd067850ffd71246a470d1e12329ee424a3462724f8e6f27563fff8d57a27dd89. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRC9U0600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc266a53ae663b8fc6d562274404a4093f465ad268cc2f73183373d3b9e020fb7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BRGCU0500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3827d1e5b283999be089ca49bbd35b64015672335a14cd981b4307b57ad3b95c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRGCU0500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b40ff5978b016ae2e1f2a35e0299c3597c1bd9bb14d7c0b5aaecf8a75825d6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRGCU0500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8e10a360dac80ffa22cb568d364008ef88d1432d7baca1945190e7d90bf9b9. 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/BRGCU0500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772eb9bc300fa038c72cb042a33e34edd9eecb75c2ef6df89ccd563563809ad6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRGCU0500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5400b927e39a00dcaf573f7dc88c52784432720843167bdb9e5d0702cb4d588b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BRPVL1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87df64e93fedae2d1a7ea492cff30adbee0968544da0f6a0e57f7a46c258feef. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/BRPVL1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0918393849084ed32221b13a0a3055ff0be8410a49ae79f732b838c6184b6ad1. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BRPVL1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4e68e6898afca2ed8c8740672c0cbabf6599c04d806fc4f20deafaa5157062. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRPVL1200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05bcb67a7c8390c346a064a5d49a5fadfbcce7cfc64774c855ae7c06bd70809. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BRPVL1200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ec1149d530e65fcebfa8d9208f191552bd5e3c19fea6e7d56e6755313a685b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRPVL1200007.