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 0xf0b9b7f77c62326d27459fcf5fd9f9504df35bef36083eb28d985e59ec435434. 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/45a0d277-2327-467d-83bf-142b9d483181.json and https://artists.proofprofile.net/proofs/artist/45a0d277-2327-467d-83bf-142b9d483181.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Crusader Kings III: Khans of the Steppe (Official Deluxe Game Soundtrack)
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 0xd0739d2b8dd7bbcec38f98f92822bdbe270b41004b976f998b5d3fd2ccf835bd. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/SE6CZ2500801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a4aaff69557663bafa24c543b4e2341c0b8f33bc7a29b410c5ff53c40ff2f6. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/SE6CZ2500802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d31455bde884fbf4004b8b7730906cbfb5108bc9b6e128e1f283bbd9aca3a41. 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/SE6CZ2500803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d845cc0ea3b2da30697e3ef9e577966cb50e8c01d0f82d99f2ef35e8c67ff1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/SE6CZ2500804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed641d2a19cacb2844ddd90853ff8f6069fd306e517fbb21b59b9efb9a24599. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/SE6CZ2500805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9839154c2994d8ecb45157c9b88706557db29c1cc3baa5643d929bf71a17020. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/SE6CZ2500806.
Conquest of the Golden Horde - Alternate Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05708df420bc601d3dea21a22b79b03b0e619a1b13c9a264957104783d06e139. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SE6CZ2500807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84671b23185271f00f13a92ad5d78cb47750cde527bff2b5a6e7a605c4d4c7a9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE6CZ2500808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c8f33541afdd786e25589609fb1941ccfb3119079f4a0888c00693ef4e9faa. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:58:15Z), 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/SE6CZ2500809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39e538cb672066e15eb30ffa30d9b145f9db9907f5b1c346cf9f4a27ef5207d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SE6CZ2500810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6d725bf6afac877cfb8d6b8e938e05bfbd8bd1526717be6a9c6e4b908d4809. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:51:26Z), 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/TCAJS2568129.
Hearts of Iron IV - No Compromise, No Surrender (Original Game Soundtrack)
Crusader Kings III (Official Game Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0849f060e272b1ac3423dc3ee47c5ad5f43a4069c78e6d4e159a343d3f59fc0c. 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/SE6CZ2000401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4279206838783c272060d4fce933eae30c733c6fffc34e892677e3ae327c8d9a. 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/SE6CZ2000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bbe56cd707ec7422baa674bc42e071195b5edc5d134f0f0b77c86514a824a3. 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/SE6CZ2000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0269844c74455b3effae3d80a15be0e0f1ebb4a5c93f32e224bdb1cb9d147b03. 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/SE6CZ2000404.