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 0x28ad0480c771f49be2df7c29cb3783bf4cb233d83a4dbe0451a3bc3c7e4f951a. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef2709ad-2151-4cd6-b077-5d08985ed65f.json and https://artists.proofprofile.net/proofs/artist/ef2709ad-2151-4cd6-b077-5d08985ed65f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bullets (Original Motion Picture Soundtrack)
Insurgency: Sandstorm (Original Video 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 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 0x984c75cedb27c978301eacc9a9c5fb53816a66fc4d75cfb0add4974a7f11a44a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SE6XY2326826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf594d6ac784f5883c8c0d37c521648f8b3088bc93b7ca810322fa97185a27ceb. 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/SE6XW2378533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559ce1dd00550761664385a5e6f84a7d51aa7d71a9cabdd2fa2134acab22bdf1. 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/SE6TI2395282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46612d132f345a78f7ac031cdbf6571c58c53d9683290abedfb69ad6d7dd296. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/SE6TI2396092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc022c860dc3d33d058d0adc1362db2c3490cd94824da8453a67c546105042cb2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE6SA2314638.
The Seed of the Sacred Fig (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1fb21ab04a3b822f9c5c0bafdf08fc9b21762ed00bc30f9c9102a130c8c582. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/SE2EI2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ae14e11191ebfc41467efec8fb7a4111f65e29ec7cdfd7415b3ad3cb3c056b. 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/SE2EI2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54e71ee073438f6ab6ddd840532738ab9209ffdb0b01610dab12c2dc8fb5fb9. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/SE2EI2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056fb68fd2d3bbf617dfe3a563fc0e14c67aa60a12dafcbd43f73994ecca22bb. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/SE2EI2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8e74e989978ea2fba5bad0b542f1c335fb71f6e5f1493af5e90f7e82b850c7. 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/SE2EI2400039.
Insurgency: Sandstorm (Original Video Game Soundtrack), Vol. II