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 0xf9c2d4598285571695c194fbe61749fad5b9a6387356b2ded769c04454de029a. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90296bed-634d-4830-be8a-e0c401b94c9f.json and https://artists.proofprofile.net/proofs/artist/90296bed-634d-4830-be8a-e0c401b94c9f.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 0x54733206edc2c94d3e9ae76058a7e6207a455734019873e9b6abbc1ae755d178. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/SEVGT0704302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8c80dc4f3f8069350730d27521471c5d6ae9dcbec484a4395e93e4fea39200. 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/SEVGT0704303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de804fda41d74171bb14c07170068bc9be3c633acf21847f4d578abc2fd9fcc. 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/SEVGT0704313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1a33cb921ec9489fdef0db38aea0e32518e4a47886fefd9ee4475014893151. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/SEYNI0900704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ffee6ca89c38247b40fd32662d41a1ac9e5e4130f36fd634a98380054ae331. 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/SEYNI1200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89402522f1bf887eaecd1b09da8d733e486dc8441f66967facc05811817254ae. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/SEYNI1200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1027efbdeff80a5ab1c48586d8529f2437ebbb5250e7713cb17818cea6090981. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/SEYNI1200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dbbd37caf174af9a168a45aa15c33b1eaa057ae4a2ba41e9d72439d2026da7. 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/SEYNI1200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095558af6cb56336e5bb61aafddf771a551e0dc325b108de6fa35ec288b0b825. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/SEYNI1200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2e4de974ca3e781eb618115647e048730a819cc2282ce8c17348fa4fb4986a. 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/SEYNI1200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008e3ccf91a044c15157069664abfcedd6bc2caad4ef434861cb3241a0aed4da. 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/SEYNI1200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f823cff75b73d8862933eea8ef7ea54d03ac6fd915ce49ac90f794c71e48177. 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/SEYNI1200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6bf00c76edda60c8c76518f6690bdad29d10410efe089efd34c299d9fbb343. 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/SEYNI1200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4aaf409fd02a2dbe9e3b1bbca67dfa420a4ab59466e29d34151f2267930ad57. 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/SEYNI1200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b7526119fa1d622803e98e2c7e6752f168b5087bd9bb214a6118bd02e391c9. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SEYNI1200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a7d5f1f91a78e804f5716eb42d46429219d9188bea67e52624e7d091dddc9c. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/SEYNI1200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a819f6e899355ca682e201224fae752e1b84f1560341a71ae45438bf75c28f8. 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/SEYNI1200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31b76af57d677a53cbf1af00067b33720788002473413d1359a083c3e2d669e. 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/SEYNI1200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f4cea5cc37e4c16c8f5e7f41e1ec3f68630e16f582217b09eaeb338626ee5f. 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/SEUM72000655.