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 0x215ae4a2ead80394336124b4e5dc439c60b345d6a80db9d0d111b7b8d9288f7f. 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/88da99f3-f91a-4a91-a775-1325a1b38764.json and https://artists.proofprofile.net/proofs/artist/88da99f3-f91a-4a91-a775-1325a1b38764.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 0x18ddac4770a2e6a6fe70e3451c5643995d31c590528ad0176620c26a22d672ca. 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/QZGWW2079465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da997e5a89577bdec72231c1690d63b40d567e9ec92f3c530d086ec630f9c63. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZ6K42001181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe6c56fe5ca0800c539aaacd2b82d95d22353ae40af25b8e63c417ae7c39737. 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/QZ6K42001187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc526556aabb259f7bc35ad129aedc4b05887b4733d3a7bc30ed37bb6af37a216. 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/QZ6K42001189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7386e966e2ab6bcbe0f2300630af8399eb3678bc79c13ce0d0c4567862cd00. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/QZ6K42001186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96a01723ceb46cc7d8ef7df48dc479e8aba74e3377f8c4589f735994cb7415c. 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/QZ6K42001183.
Fields of Hopes and Dreams (VIP) [from "DELTARUNE"]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce812a7dd9a78d7c00dd1e345acb9185a92ec19b3978d7f19afb70f599e30b0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZ6K42001182.
Don't Forget (Reprise) [from "DELTARUNE"]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a6db37d43c044b460e71b3bd47409da79c4b9a0f42a63454dfc365d06ebc9e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZ6K42001193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4653ba527a3c1303ffefde0c1205c0ab1d3de784b6aa803ee4e46f16022e43. 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/QZ6K41700732.
Zelda Remixed: Music from "The Legend of Zelda"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36602493432784c304b5df34c8fde25a0fdf4ce50c05cf886923799898d11045. 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/QZ22B1977453.
Oath to Order (from "The Legend of Zelda: Majora's Mask") - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686be999b5eb9a135fbeb2aad61a86d9b29fd512b777e6cc1bec0032786870d2. 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/QZ22B1977462.
Oath to Order (from "The Legend of Zelda: Majora's Mask")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97c44f4d1d3e74761fac35111c52625db4dfee42eb0ab214d15bef51c7e8ab7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZ22B1977450.
Dark World Forest (from "The Legend of Zelda: A Link to the Past")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dbb55274420d8aea75518d0f85081bf9b9657c6429a06ab90af2693f2628ea. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZ22B1977455.
Who... Are You? (From "Final Fantasy VII")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894af0c60db8af956d4fa6fc43b6831db57dec0e1354d25efe05276ec6505b90. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZ6K41700735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5a8e29f805169afd6df5d47cbcddd3377d1cf3147d363b3c74a681baedaa2e. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZ6K42200049.