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 0xc4ffdaafa9a2bc25092e08dc152d538847603818d78fb3c44d8151f78d4029d3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e225ccc-9275-45be-a470-8ef36076f858.json and https://artists.proofprofile.net/proofs/artist/8e225ccc-9275-45be-a470-8ef36076f858.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 0x441406bdf217cb63c56fc3e3aa23f4f8f870ebdeb9721b0dac58ff5aac8e16a1. 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/INR2D2200181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dc91efc151661f9b6e646a17390366e61b907d553cc3fcccf291005af31da5. 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/INR2D2200182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26014cd02fe67197de7db61384064c9b0b0a42d56afa55aa0df02f1e25f4285b. 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/INR2D2200183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff05a0933c92e32a0ea70942e74423cea932ffec55d946dd26e526d7591d3de1. 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/INR2D2200186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63dbd3ed973a2a4751c28069646c5c2b80bebac08d43a971341facbcdf727b3. 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/INR2D2200189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f98ec4d0ffb426b6e723ca82c1a788241e626ac772335a4b32f6ac00910f46. 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/INM7M2000760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9119e556e38fcd578ba4a820bc2d5bf2f29440b5e434b2c29a228c2942976ea4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/INM7M2000762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0609c920fb985e3a967c27f868efcc1857ad5c76b3100119dca9409745133bc. 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/INM7M2000765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0518da8a54acfdf5bcaa3685c26f97f83dd500b6ef17ed8d8763550a27fa1a99. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/INM7M2000767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3cffeac1673443708b1a98c4e3eb5a8a717018ff3d4810ada62b58e0d82543. 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/INM7M2000769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d08517592aaa34af18c4b005e2b31f7d71863653ee9ca5ca7df0f44b19923f. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:55:51Z), 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/INM7M2000761.
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 0x14b5f393cf8437e117aa4aa887c83147015f78e50c517c15b21003fe2693d3aa. 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/INM7M2000763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2d7dbb3baf3c303a65de9215be398ddba26f60f1d991edd6560824194aebe0. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/INM7M2000768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d97169db54bdc23d02f5d1266611255166157b5f262c798b48da6540d3928d0. 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/INN242200359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1583bc271f1a48d7f7a42e5c1451bc0f016593935f0b788804a8221efdb0927. 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/INN242200361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8930b5c72269b6e906b9b170ed1b844bac9a381fd9cd992dc11cfa71f9fd4b. 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/INN242200360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdb1401f84146710d52892735e3bab3223c440a635465ddeac8a34fd54c9268. 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/INM7M2000367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea3b3f705c30f1bec14df636219189c43493a411895d946e011c6e4c8fc0d05. 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/INM7M2000369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4397cf1496e7ab3ee801b4320168b3f7af708518a5be62dbca6325cc1841a61. 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/INM7M2000371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01127f992702f79587f8ddb1ab042399579cb0384ef56a45c831b5bb3f2b2adb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/INM7M2000373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370e053858ecc6eef917a59745d9513d3905ca092d62002d68524e616e4196a1. 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/INM7M2000192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01096cee960dcbebbb6e19fceab2f46fb237e55abcdea1486000e039fec17d69. 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/INM7M2000190.