thumb|upright=1.2|Various physical puzzles A puzzle is a game, problem, or toy that tests a person's ingenuity or knowledge. In a puzzle, the solver is expected to put pieces together (or take them a
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 0x3601449d1ed1f7eac5e597408c6c1d757560aa575eda2734f468eb2e20a0ad06. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f14837c-eab2-4f64-a8e4-d8667130412b.json and https://artists.proofprofile.net/proofs/artist/6f14837c-eab2-4f64-a8e4-d8667130412b.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 0x0ed2e21b2b0a3a1c528dfd1ce5965b4ff3a42eb43bbb2e038cce2f2c0b2963c1. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GB8KE2324212.
Grey Glitter in a Hall of Mirrors - Vortex, Daney Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab96d798cd20e148523828a09dea2904408e5b068a8f5f3acd0dbce9422d12dc. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM8DG2258843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac0838ae2479e5949047823db8aba4853dcd91dc5ae257f22a6686dca2b5a48. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM8DG2260346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1491ab154707eae7076f7a0f60ecb0f527a7cab42bced7e99197d1509058dd94. 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/QM8DG2260389.
Possible But Not Obvious / The Last Thing You Hear
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8728dd690a67cbc454e0f60ebb8f7e418dccd04d621a77a6a4c55560f91ceaf7. 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/NL1ZN2402823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5efaad5872ddf920c841175dafe9f17d641c764df6b2d60883d00b299e553bf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NL1ZN2402811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7308dbc2e8ad3cd7267fc7168625acedc3d72c03873b88dcba8c62ff503f553. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/NL1ZN2402710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45c81b5f8d1ff157d0341a97f769d2792fc66e1386794e6ca017c3783d2a0bf. 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/QM8DG2477969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e13089ede5886b813744aa22264ed312ab1f6aff5a54077e6cbf6ddf3552a18. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/GB8KE2324215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf658efc545cd42fe396258e01ad100eb7e847e6847efeeeacae5f83c5d7c3b9e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GB8KE2304484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e44896275e369ad7a970dde82a00b04a154026697c9ca7a5c09cc388eb03880. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB8KE2301099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2be4d8485e9faa69a69db81ebba123b76c72cc667a60b33e71c2db1aca9d039. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLCK42235259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64b0236d48f7e5d94e410e2776809a7d5839a7ac6d7390df4b483d2d5131df1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLCK42235298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a5d74fd4fe439f3286a7c45cbe1bfe728a748c0746e0501581c6789b8c415c. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GBLV62122734.