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 0xf35056e2ce01aab389b415e1604fecf96c9ddb5878d73cf8997da748f89115e0. 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/24864438-dbec-4ad8-9092-fa80f74d99ed.json and https://artists.proofprofile.net/proofs/artist/24864438-dbec-4ad8-9092-fa80f74d99ed.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 0xc181bfd44c15c3ffcf95adff5fd328dfbb286cd7a81d49df0534b47ab39820ee. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/FR6V80306551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9793ef52eeb1940b5bf65f49125f8f7cd6e1f8dc8bdb04fec03d35f040de834b. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FR6V80306553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00f26aa874714df52d9ab82fd68745b9f96502e617de0ce4b5108a200273b79. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/FR19X0300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3f4c566454695849cb0b845379971aa7b956974ba01b3d092f937b070a48de. 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/FR19X0300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89245fc24eec38388346854f86cfcede54cb1f07753758e322f6d7725c057258. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR19X0300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7a0c9298f3cbcd73619e2929a335e9f8c82a43e49ba9382f26529a24b0475f. 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/FR6V80510435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b288f3f7dc3e837edc438b71ce846b4aa01e72f84306e087b49d774e437f1c. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/FR19X0500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7013c0247f52214f43d7ae573a1a5e01ebaf38fc3bf68f1dc1747a067b5ba498. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR19X0700122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7013c0247f52214f43d7ae573a1a5e01ebaf38fc3bf68f1dc1747a067b5ba498. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR19X0700122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bada458f7af9759bfc7261b178eb00bb782f78ec9f4634098eab015d7e0f73f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR19X0700125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a1c58042e18d3d50b4486ce21df94e732c2dd90e16437406921d4ae04e4f3a. 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/FR19X0500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f441dd43bd1b858828e4a9dfdd69a473f028c49cfd7ceef61802ff48f3addbd. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FR19X0700119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfff716515fd711fde84fadfb90ffc3a0a7cacf4197e0a4898d253091a7e092. 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/FR19X1300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba3bc492d88c4865157c09ea072a256e6df2786bf2c8319fe4ba2dcf327dcc4. 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/FR19X1300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e043b2abfc7c6164d2642e196b23929b9ab4ab941b1974810972cbd11414a8a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FR19X1600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ce5acea609e766deea925c972c62e31e562d0df0a4370d20784d260b5ef856. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/FR19X1600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21209deb29e0e9588cbeccf348bca9a10bdb75d58db974674535cfde65338c11. 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/FR19X1900129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550e850101bfca8bd8638c967d0713e3caa016083eb38b1c79eed36e29fd8174. 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/FR19X2100130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd6b5cfa47a9b381ae3e9edb586e256995665a0b6fa563e4dd2cdbc7f8af7e7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRP401500480.