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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644428210d52547e1b39663218f1749dabf9e15e09860c25e7d45acfde1ab55e. 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/46d066b7-998f-4986-af3a-7b03de59a80a.json and https://artists.proofprofile.net/proofs/artist/46d066b7-998f-4986-af3a-7b03de59a80a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8931b4e35dc416d6808dfba3975fe132d559a33928b83f343299917e91ec7fd4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPB970800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdbb06f4c556930dc0f95e43407fba8edad323844e9537cb49deddab7c57901. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:03:37Z), 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/JPB970800201.
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 0xdd3901aa545b442a0772ce1be5e0a6f8bc7d5dbddbedaff538f2a717c3310369. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/JPB970800203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a51f375336de8d28aab64f3bb0e9ff61dfd37a3583a6ab7233b7fd0084f253. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JPB970800208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3fa84c1f99c5b5734ebc9d2ca33d6e9ea7e24964c61656e864e82f0ee19ba4. 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/JPJ901315780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafde5c6f1bc0b731d5ea397d5be82e82aabbce79053194609cf807e03896df1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPJ901315790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2705b9f1aab0e1b5c647665810cd4c20ea3034d15c3438d6b62abae5a87d7b6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPJ901315730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee92dc53a08c7b1550e1340c9bd8babe627e3d98ae015f57c9015706f903173. 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/JPJ901315810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398b1f1a9125362fbf4d4620a20e9f9569966fa4edfb009a52ca6201a701106f. 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/JP92A2423722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e77ccea3860dce2eef501d8be1d5f1c190bbc2784016968381654305a90fbf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JP92A2423724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144751b603640a5064257374d96573b6e9c780af4453453a50a16d4238850587. 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/JP92A2423725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f6f9529ee2693ecee27350b65b92cb2da5b67135827930b02c4c47297a05d8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JP92A2423727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9deda090068b4dacea3fd0da6f799d2da442125d5e8087b52516f88ab329038b. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/JP92A2423721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd73103713099c16b7bdd2910dbac647f165281e29bca817a4baefbbfa3c7982. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/JP92A2423723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf6499c9e1604147bd81315f4163cb9ded6577027bcc6925dc8446d49355aa6. 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/USUYG1069779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa326d34cef997702550e2044d7f67941397f958c837d5d2c40aefb2c3eddb353. 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/USUYG1069780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d95ffcef9de14d99b658d358cdeaa7bf773c8e5c9192ecad5e3e4b03cc627c. 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/USUYG1069781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3050bc1ee96fdd2c11470455e081b2be3f36934db5215e50c8af409ed757cc96. 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/USUYG1069782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421762b134941d08467339ad208485cddd4dd4968e116bd2b96cd92a338ae78e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USUYG1069783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea740e7c9049e76f865bf9205a8a1a435f67eb00e1081bf5be5ff04ca0b5e84. 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/USUYG1069787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22605b3e18fb0a038d413553dafbdf4d814557dd3a0a3ccdcab05cbd688a69ac. 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/USUYG1069788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb262747574411c15f7c2d9c8a7361cb634a96ac96fdffdde7e0ec96af250ce. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/USUYG1069794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8adffef93f7777f25d840434716bbc99b9a4104b61fdc33b033150599cfd70. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USUYG1069799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439e43d5324bb41e5b0f3796117f703bc05297a0743ec03a1eb4d7ba354e9d3a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMLD61402320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6651f2e3746d210ba5d5ddab57d44f2606f14c8feb9ac102b0d642f494378d2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMLD61402321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5e60f5b07b274948b0467632fda9f86989ae87417cb02505844f3d108e4cc9. 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/QMLD61402322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc459e2020a5cb6e674cf76359675c9084c0ff410fa3b0d02ce40ddf80d0c45. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QMLD61402325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cd4dac79b036c9477e01678533ce8304a6c125ef868aa1258079ac099ab2bf. 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/QMLD61402327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844d28f50766edcd21bde8e4fb2842de0c687d1b90bca43fa1ac27514f3fd7e3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMLD61402328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79635a5b67ca938871e0e7bb16b21af26b9a99f34032b8eab03dc4445df6fafb. 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/QMLD61402329.