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 0x85e9d53020af569cab237d89d4ef60139b2cb1a3515fe544102f32484a877569. 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/ae2a4f26-cb87-40e3-ab74-f75251d1f608.json and https://artists.proofprofile.net/proofs/artist/ae2a4f26-cb87-40e3-ab74-f75251d1f608.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 0xad2435125552caf22c43aeee39222b88b4ec2da7f654a90b75c07b6cb8c9fbfe. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-21T19:07:52Z), 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/TWD252300217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c60717c81cba22d5ce9820dea07fb16cd5c8b1770d334bbe9f3280574a67082. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWD252300218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3b96091fc96c210261a6d456056e55fe0310e9c0feb90ca041b7b9db6fb6ba. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWD252300219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0fb02c28dba4513faeb903dba1789123b5deca07e4266ddf7fad01ff67f817. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWD252300220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1ad7764933aba178d1ce6b14f4865fecf73da18a70245895a0658c23abab46. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWD252300221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae2a48fae94edbf179d9df3b252c2958ee83136d702e7b5a13c91d1ae494142. 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/CNA231800539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8038106c34372b078e3655b4290ea1bbcf1ab0221784b0a70c51aeb35b9277fa. 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/CNA231800533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfffba16357f0ca8cd56a1178585f478a5a763f249bca0a750234960623cf05. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNA231800538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf89fa487a33b349b33e683b11b26963108015300b5a72b9282f018d3c3651de. 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/CNA231800534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa644344630dbac2e2596c43e2db834d7eb809c8c05021d0468f1291dceefef6e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CNA231800540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef43868bee5d2ef61231ce47a7f9875c99e62f1923f929632615825c3048dbf1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CNA231800536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b70e6f0761319782a7c5e91d0fc376643ad5116515522e202559177838e9dd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CNA231800532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe704043a9013f0fec5d7249bee02d2da4452188fadaf358d69aed1e1ec55927f. 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/TWD252300237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c956a25c6fa4d81fe2c1227e705b0ed3f68228855cffaf4a34ec1f984401576. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWD252300236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417f6ed7f97236937cf9f81f50c93d3748d95031dd16accf9bbd86e67639bc2e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWD252300215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2f6126d0ef8ac4604a904d08689dbd7a097e79479aec2d3c29bc8a3e062e6d. 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/TWD252300213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae2a48fae94edbf179d9df3b252c2958ee83136d702e7b5a13c91d1ae494142. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CNA231800539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfffba16357f0ca8cd56a1178585f478a5a763f249bca0a750234960623cf05. 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/CNA231800538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9b052164f061e35531fafaca6416c82141aa3e4362c370c3ee5615cbe5a848. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWD252300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b82a3d0492692332cb7642b7684733781849f2926655299f2c58815f6a57b5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TWD252300199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b70e6f0761319782a7c5e91d0fc376643ad5116515522e202559177838e9dd. 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/CNA231800532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225e73762e3cb0569b5e7f1a4e01b711d5433463206675887c9240029d46b9d6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TWD252300194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf81dc593457eb66deecfb4f886c656f5e904832f7ba4e926c00703d53afbc2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWD252300191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54ebbd765ca336e875b6d0b88389c2bace730b27a31edb95f6689dd738a6c28. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWD252300188.