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 0xbee24a2334cd266ec009e6f4ba5017e284e8e0f83ca7bff4f5b850669d92e31e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/619517f9-e29b-42a9-a675-dcea343ad2c1.json and https://artists.proofprofile.net/proofs/artist/619517f9-e29b-42a9-a675-dcea343ad2c1.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 0x328d5c53afbcc61beeefeadb6eb7c6062179eaa070b7ba6b23f8cb6a4f44f2e0. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZNJX2489286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9ac28843b5d0db30026470f563dade6071ef7b9ed7e9fa4261834b76a3eb0c. 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/QZGLM2458683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7fb58163ed11365dd4e1d9e7ca32eb7a2aa183c46474f5c81d88d4043a7e04. 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/USLZJ2457505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb0f0e96e55ea448c77c77a11848d49ec230f38be6d4f875ce490adb87c5ecd. 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/QZWFH2344160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15f488d71a8af489b5ccb841cfce7d89ca4f2cdf32a295f08b991eab768738e. 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/QZNJY2343167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c6473a9792606d00556d2d71c606006ecf51b60be1faa5f44205d237faaec7. 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/USLZJ2335762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71482b4050edd228f819f9996b2912bd4aaf91397595a76aa4d61a44ff672763. 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/QZDA52365098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb66ddc898e70aead830d22bf03a5acd270a92909a38d540177353237d4593ad. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZTAW2209223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f52266986ce43adb6b867f386b6c10fdbbc57c9e51d9a5a8fda77787fdaf87. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QMBZ92294227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e2f6db85e7fee186a4ce0f826d4f10e18090486aa8df9cf6ca31b2f7d4fe78. 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/CH6542264075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881ee72ba5dcc1a68045f23ea0598d6280d3445113d12f9856d523bcc5571f37. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/CH6542253134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191a129bed6c9c60e04a5e9b0551760fa55f101278f47db2357d16cda3aa5b74. 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/QM4TW2267776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73f6729aa00309228fca07a0e86c567aa356ad1bdcc868efcec64e87dfb5c88. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/CH6542206415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9238a632d3ee1adedf1c11106ef8eb1ff43f8f09ff4ff75dd40ca7cabd7314. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CH6541686571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5ad124de394bfe1f0ab1271fdbc60c04c23d2b3a4c5316c1d020ea1e2e72e9. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/CH6542190823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641c349c1572f5d8eeef6d7252b809de244e9400bf3b70f51897efc8c959bdf6. 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/QZKDT2101178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7826fd06d1791b5ae749405d1988a2add401a13b0011f4aa4641ab1958a9829. 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/QMDA62108904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416d274698cb97dbc09c57893f6d9c9efe5070b7a17d3980b60e9a37e4899867. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH6542168567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4636dfe3d0d631f50892d4f9a64f47ca74f72132b2dea1cc1a78518935ab975b. 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/CH6542161902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff83547992babe64f453351fe45cc394bc010534e573aed2a38881cb09bfd82. 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/CH6542261394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900f48c31c268a5547c0f04614eb34eaf6515c8516690c385c5daae1a89c5d18. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CH6542143280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e656b92ac2c97c5a1c06e060366b393880d16488954f3d94285932052e5220. 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/QZFZ42128342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997935fd981692c45e636f2cc018997b9170d72425dedb0486a688910bf3015d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZFYW2152880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2197c004240c1b33a5eed0312f719e309b396c9abc5ac17744927ea211cb8576. 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/QZNWV2099716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28e58fe977ee400d12f2eb54158c1fe2e029f02fc20110b2cf55ebd77e13bc1. 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/ITF252000278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e88641838fce5bdefb835b2962eee0ad3492e1b772789f4d65fdfa3f73867d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZMEQ2044479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46ea0faf879e91aceec9447d7f612aa643f14b6c8ae162b82f5abeffd7ad259. 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/QZMEM2003444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea91a93f2f6d38ecb40333f51d888b7d162ecb79f4f80bc0254af25dfbcee9b. 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/QZK6P2004247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52625f8065d75223d7a6d2814a2ef93d8f44916f100f7e5471f33e3e41d2fec5. 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/QZK6M2025053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4bd8649a5089d2940f13fba4b65d4aa8cc1d3d3cca7f2584329522b8e61201. 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/PYC842303072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194c2b356d2debd5529e4ba797d537741f784c7b9215137ed04a486a8e235f1b. 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/GBRKQ2110302.