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 0x40cfdf2524d7e41085aef36a003c77746a275fd0c8bcedbd4fb53d5c8ef4843a. Chain 2 (Bitcoin): anchored in block 954055 (2026-06-17T05:51:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43d76c5c-12d5-438b-9275-87a707f594a3.json and https://artists.proofprofile.net/proofs/artist/43d76c5c-12d5-438b-9275-87a707f594a3.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 0x1a3e8e7bdd30942b171f3fb972b0efd5c0bddf98acde77502ede6e55e6c5e8f3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEZ900601537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106713e9b421a199980def8ec355db30304107483e8c7bf71d860b859ebba465. 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/DEZ900601538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90e5022890062aa7843489afcf03e81dd7dbd21e5079a63e6a402fb7f80f996. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DEZ900601543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7586c9ee01cd28111548ef8a0de37a0685fb2e092aadbdb450f125e66089543e. 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/DEZ900601545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de9d048bdcc4d573f114a292e9f3779bee5248962849da5624980553668743d. 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/DEVY82000812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5619576a66f913778afa87395d371a86893aaab039a16290fbb0290bd4aee46f. 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/DEVY82000814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4adbba14006f0acf4fbd84bd561f46645161cf3d061419f53fdd4e54644d8d0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEVY82000815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf681c10fbac79aa59937ae531856fcd4db545b9dc8ae805f0c526be2dbc1ed5b. 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/FR2X41767269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7766cd03090265165755ef3ef416d2d736450d01acc1233618de90a9f158ac3f. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/DEVY82000817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ee3aa616003fc76890358a88323e31961160308c24ac384eb24a12f4ab8a4b. 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/DEVY82000822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2449004a6052d7437fb9d0c28184d2875b089b6255e747367e43aa9929c34206. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/DEVY82000824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea56a9ec7ed49f4ef2045163e95d6aadc7dc9b2887c4fbf0e41d8e19fec43e58. 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/DEBL60773391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d6784c2c0c43ebc1269210252df7172acb5689ad3e1285db0950cf68cf9db8. 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/DEBL60773392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148a2506225c6f125b9cb03a9d72fcadd096211b20b7551401b70cd89477662f. 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/DEBL60773394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee41a628b07921313b57174636eb71481cf0ad643851d0cba88804e06e64e40a. 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/DEBL60773397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cdce1b7d96778aa77b9c3e3de076a9cb9c8e9f4290806980fddd44f6a2d23a. 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/DEBL60773399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa937997995653b6f34ec4e38b9dee72b1c680caeefd3775ce47831d144404e87. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEBL60773401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14fe738df702d05d145f1b2be8b9a565ece3d78ae411166b93daa0eb2057aa3. 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/DEBL60773402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775038fd7abb7248b6785ea3d72ac88908fd48dd7e19a1fcbf83509a67a8375e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEBL60773404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301cbf63f1eeed690d0c18c463faaecbdb20c552a9a27fa8f300e6d9cdf9540c. 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/DEBL60663046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8978a90f493b2378c76509e6418bb47e96a5fb7447259aca0547ce20edd955e9. 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/DEVY82000855.