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 0x206e1d84fbe7d456bb1e4a2cb6986f474c6c6f2f3d5d2508b41832e792426e79. 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/ffda140b-ebcb-4ab3-991d-dd29e2f48ea6.json and https://artists.proofprofile.net/proofs/artist/ffda140b-ebcb-4ab3-991d-dd29e2f48ea6.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 0x6bbbdccc1dbed50da99598e7da9a37f14009aff71057d59b8ca097c3b96d8708. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/FR59R2578981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1964de356e39d4842de38eddd416bdf0cf5f5b8038d9b9c0327480654fa3255a. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/FR2X42581313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9d62f09b7695b2c5745a66c024f1cb9047e4518f09b1b979a165455e0488ba. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FR2X42581409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f4c9a16c6e91a9c8c6deb6f7cb6730f0ad93edfd4c3e314c9f86b8bb4022c6. 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/DGA0T2418405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3887c8bfb618166c47efbb3f602edbb75a85adeef31e1473fd3868280c498de6. 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/DGA0T2418406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b09de59a0d0a3a7a1af5b7863ff760804117dc5fb21cf7afb8278655d72be5. 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/DGA0R2450411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3222627f430ec8c6b165fadf41cb3ea56ceed1b6701ebadaede60142bedeb582. 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/DGA0R2492429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb313739d3e9c60b2253f3e1c07a89e694d6d4f2239844f49b28c29b9998ec929. 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/DGA0S2495466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc466a9303504020e9b2867c7facbb5ca1723d73310bb9427661f8f5615772384. 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/DGA0P2474418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0458b9038be4620ba9a86a583261c3f1924250b3ee07b75459f776a7ce1eefc8. 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/DGA0R2492451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c8950a829566f5b8516fbe3fc16eb6449202be894e5fb8181e82f64b2b451e. 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/DGA0R2492452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d94813d7dae012b69f81c65639d976b3bedc0b0a44df5e76cf0d6b78d0b5e4. 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/DGA0L2413602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635ea3cb9ec19964e400e1d3b5f99ae2c156534829166dc12e8b6ad55d88346d. 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/DGA0R2492341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe311666f53950985dd315237b741a8ddf4cbb1489e2f5795c80d4ac2439ee52. 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/DGA0R2492342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecb7c7a02beb2a8102581af8c6ccfe1c8d27e2fd025c3fdab31e52661012d8e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DGA0R2492433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe731a5728151f833daeec7ba9dcb542c7485cca867f101a56fbf05bf8a8e46b1. 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/DGA0H2406895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4503908952f234093946da35dac914f0bae444eb936379b0b01d5c87abb95848. 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/DGA072485508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f74598fd8c73738907bba944c07c5acd43e2e8ab71a9e6cd887cdd0c3dfa6f. 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/DGA072427806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbcd173838f7d0c4aa2f8c0974ff081a417c28211171ca3aea9f17938214b04. 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/DGA072420891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb3c77e6acb9141c5ed5db8f80e26956cb35a5a7d48c1df1214dc497e0fca17. 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/DGA072420898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617000d17c599ac7ebf75e9f2258d2f5e38fd0389221d6d2320ab5d52d43a452. 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/DGA062402287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88186236b607ec5abda4131f958e8b6bfd57cb7bd4afec2fcc396f33b836b9ce. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DGA062410645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6957e1aef3a5f27727d07f70ed8ee7ea5fd2d5b21a408aa4027d52ea3f25724. 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/DGA052408569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0558fd6a4788d4f72783b2c0575e509907c6b2f630c5501a1df02ffa509a17e. 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/DGA052431313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7417857754fd1c76183793722dd1fb2d131c7f7d5445430b239bcfac9549e3c6. 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/QZJPM2465755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b4dc8e9111906f5f4dc65b793de6d8ab5b2019253e47e30d19e54fae4f142b. 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/QZJPM2430711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0062583202a39f6987daa10bd89ce758f409e083e9ee2ea819e4a83dbba979e. 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/FRX872439283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8393d3f02c20c043584369d8a81dcc46b96b40a98928db9a86a041953721faf. 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/FRX762442160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3883c9a38a199c7be106ec768ddcbbbce10f3e9266ea9e4b1ceaeb84d7a2074f. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FRX762442161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40b5ba077a3d68510d101699ec54cda9410351489a1065ee2ee411c756ac007. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/FRX762442162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9605f432e0ca0833fb84de513376cd36a3918c35d1dd64710d5c139fe7584d42. 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/FRX762439577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cca441a9d3db4f03ec118495521c7302d42c7678522cbb15627f24e70dcff3. 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/FRX452490026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cc4a3412c11eca40177ede75992628b0b54e40229088a71b4193eeaea453c0. 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/FRX452483792.