3D, 3-D, 3d, or Three D may refer to: Science, technology, and mathematics A three-dimensional space in mathematics Relating to three-dimensionality 3D computer graphics, computer graphics that use
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 0x28a7ae2662932857029b246c74a328c5cea328556b9a66d3bca38741f069c211. 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/0960c3d9-8a05-48db-94c2-27b680f0d355.json and https://artists.proofprofile.net/proofs/artist/0960c3d9-8a05-48db-94c2-27b680f0d355.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Problem of Leisure: A celebration of Andy Gill and Gang of Four
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 0x8d70eed3588a1c71691f4a96efcaa9707b5374dc245a2f24c3bb0e50290bff86. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR0ML2000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47921b6a81b4aaa68858f85db42d0328398efb7b47f8d09081441247e6ffb5d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR0ML2000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fccb0f743dd555c36c507637dc54397b507f1e40cc258acffac5941d1ef027. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR0ML2000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32208e1a9ee5594d8df93ed948a97174ac122e622a646ac93c761265523c490. 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/FR0ML2000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca9023e75b1e1662b41d1b5e4d4891a12a08b3804474391fa6f5e4a9619ed23. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR0ML2000090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6dd22e4d72c5fbfc9fe8270d772277502d7e205fbb2dd97c0144b95a8b0053. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FR0ML2000130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07d4c01d2a300e3c75b36e81d6fe4d2337d9b052415e0363995f23ca028fe4d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR0ML2000140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb252d08fb9e697c2f4eb030e54fa012da395602c07dd7158e20c0ba1fc11451e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR0ML2000150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283cc983a4948ee9139ee38c6ec985880b277c2f47d65b23c1cf49122a9bd9bf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR0ML2000160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679554f200ffae74fa66d0e0023aca1104f7fb9b79d8bc7ca0165e864c37733b. 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/FR0ML2000170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1e73a21693c3590720e685cd47c942f89ff0d612a4ced3c64375e547477eae. 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/FR0ML2000180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf262bf2cfcf1d51ff9f6c4d71695f9afde2b0fb2cfec571a12b73a61a4dac6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR0ML2000190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0181cbf111e154cc06870f47f3cae7449c84e37569b718b8a43b84b07832d1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR0ML2000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfe8f06f0255df116c85e1f6e4ad40d6ca63fbe8fc2c505ac44f91b4141ad5b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR0ML2000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47921b6a81b4aaa68858f85db42d0328398efb7b47f8d09081441247e6ffb5d. 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/FR0ML2000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a700bafccc5b36e5f5c43cdbeaeca659215c78edcca3ec07d329a13143119b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBUM71507628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6297dfef18965fbefc10645c9a6809b37411c6c42eb484f965cf9561b19270c2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBUM71507629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6a53e8b2e0d0377109fda9cbc5c52239afd2798f4d35a03d76ce2919c5d92b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBUM71507631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c3363682a26c42f94de6be18c6a06d22a015f6f2981f0e74066c2bcaf44a1d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBUM71507630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca9023e75b1e1662b41d1b5e4d4891a12a08b3804474391fa6f5e4a9619ed23. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR0ML2000090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f928f3de107e8be6b10daf69bf3831e1ba8f1bead4c5352e422b4397d0ce9a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2101483.