thumb|400px|Newton's introduction of the notions "fluent" and "fluxion" in his 1736 bookA fluxion is the instantaneous rate of change, or gradient, of a fluent (a time-varying quantity, or function) 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 0xafb0513ea4f0b4b745431e7205557527b2e6b3ac8d87a3f9271e116372669684. 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/8ac5be09-a40f-47e9-9285-9ada9abde58e.json and https://artists.proofprofile.net/proofs/artist/8ac5be09-a40f-47e9-9285-9ada9abde58e.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 0x67538d789ea11314715b66281eb3c9f5f6eb799701fc03c85540fd094ec767aa. 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/GBEXH2200206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bf5b55405594eb3e3bb4df4fcf6e2f057a85ccb5838c32eb5c7b26a8568c90. 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/GBEXH2200208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a526c86b01babcdee672ad8c703f01c3e5e96b72d42be40ec82734b643bb62. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:02:52Z), 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/GBEXH2200218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6b5d4e6c37b042ff41a953da0c1139a063ff0cf7e3ee49ed59298b91e5d7c2. 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/GBEXH2200224.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83da6b0660b836fb8783cfe7c65dbe97b2292228c03c0d7d2e0a3c441bf304a6. 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/DEU671101235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071ce6c105759b234fc1927b7c8b619bf54b5c4711110f3af696ee01dcd6c68d. 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/DEU671101236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592d74bba3fc49f3b75cd1bf9b1aa2516fa7bdba47e33a3c403c1c6fccac4207. 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/DEU671101240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ed0b36c0fcc4b76d9274fbf1145193f877b5f3cc5ae603be03784131a524fa. 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/DEU672101799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba21ad7b670b761ab8f553d38e091e8dffba949128f89ac1ddafdddc7cd0e72. 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/DEU672101800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aae6c0e81fb60d33ab07e8ed309eb9eb7ebf3968b226e63d0ddbb84ff0598d3. 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/DECY52000887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812ce8a1b19be5d98bbbdf12a9523572f5559b4bebafd9ec295a92a03d105795. 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/DECY52000888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75ef784ec86b629609023518b2e73082b86574bae2186b183ffff5f1754a6ae. 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/DEPL91800520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0148c3f710ab70653c72259cb3735145d6c1ca67511335d71cdc93fe930d01f1. 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/DEPL91800524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa326b557e5a2bad87126e78f225baedbe8c824674d327063bdae71ed6efae4cc. 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/DECY52000760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26caa4b38640fd084d309bbbeb1b80e12bc7385387623afca999d384597dc066. 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/DECY52000761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59ca4b413d3adde7b1bd2fc42e92e187298a5e29c047f8f52b55f760e16f875. 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/DECY52000762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eba940698c420d161666c0e745c649a706741bdb36cbf5cab41b68ff59942f5. 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/DECY52000770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8624a1db2c36187358deadf3125a771455f13ae79fc213837393d399f8fd8b1. 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/DEU671401081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8931f59ce48d6525a08dd469ef0ba2b3fe4841ee0407044e1526ea7043a29d. 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/DEU671401083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309510f8cf971aab90e58c50192afa45ed90e3b4c73961e63d0bad96aa8ae57f. 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/DEU671401088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b3788a30f4a229af7b8337e032b93c8a7f068f825e22da428323bb9356e748. 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/DEU671401089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3975f0dcb14ab7e0165a22b15d6cee1b2bcf43764267233ab87e5f931b34fa. 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/DECY52001073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49314c73e2b451d81767ba25596f43a8f503cbffa6ad19706829662a2889df56. 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/DECY52001077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19d58fe1ac521c223f71a2ec3864a30ea3aeccf837a9d3f5239c1631b65369f. 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/DEU671101436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05dd1cbf195d8cbc9f4276516328e3be189e8b826ab266a8e98b865b9152b34. 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/DEU671702231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ab29d440823107c0c5c0b3b772eb2897679ea69b20f07bd1f500652e473c92. 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/DEU671702233.