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 0xb2f248dfb3f5e6e127889887d6412245f8190df1a9afba2f2029e8345c2e2822. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e4d9091-b4f2-4e07-a251-0f3bd3e579ed.json and https://artists.proofprofile.net/proofs/artist/7e4d9091-b4f2-4e07-a251-0f3bd3e579ed.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 0x670abf75c35c556d1797e07ab1667f21f642afa792c9f90d6b2166174da84aaf. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBCKG0500764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e8e96dc7b7e24b5157eb99042e652c2615b3cc3905afc1f25a0f4df3d1e585. 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/GBCKG0500766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe676885d5fe6c49cb610232dc3c49e0b3109fbce9a0688711ed881b955c25a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBCKG0500767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d508af7c26bb02f212bd5d7d456f066637674077e385ab01f36c8fb2d224f6. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/GBCKG0500769.
The Athenians: 20 Best Syrtakis From Greece
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d31e0800466b9f11c9e487a26c47c0cf782d3ddc09949fb1b0958c7a66b22a. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GBCKG0502086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab27668024a68e8564e3e9eefdc50ab94d92aa75fbcdd10ad7a3129b75e5f13. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:12:48Z), 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/GBCKG0502087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f258b568ddd229b67d5d282889e2df05d9d31b47fb6328ef98460ad3ce655e6. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:42:26Z), 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/GBCKG0502088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3274b0aba4c676424d944b9423011628d0d86a27c309997288555fe0fb7c648d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:35:04Z), 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/GBCKG0502091.
The Athenians: Rembetika and Greek Popular Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841c20a19c7b4f7c0dfedb8602beb279f138dd1d7f7446f92746d909437cfbff. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBCKG0500497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5844e0752af373cfbb0beec5d57e561a525abf3b2b4901cde88601b00435f69. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBCKG0700184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bb4bfe6d452cd1c4b5529aa032d67443ed581506e6ff4eb6fc8df282a36cb7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBCKG0700186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b39e980e1c2cf7b3fba1273d993ac5ef6cfbb58a412be9249a3914685bcf32. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:04:56Z), 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/GBCKG0700187.