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 0x0910ed62d52a0a34d11dba61a6c5fd050ed32c5dcc21d4753e8cf4f404bc29b3. 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/a14634a0-0527-4cb6-be4b-b7561d91d41e.json and https://artists.proofprofile.net/proofs/artist/a14634a0-0527-4cb6-be4b-b7561d91d41e.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 0xcee81977e68dc767d8aece906e93087bc75938ac9c07ae02a9de0aa3002b0339. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:03:15Z), 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/ZAJ741100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa936375dd95cbc38a314ee01174bcd6a1fa43c65442e67c714c6238ae4903a2d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/ZAJ741100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ef81464e8f2c775828fa93af112cbf18fcb756ddaf4051da2445a03609a215. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:38:54Z), 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/ZA5EF1700322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ec5ba0c7815fca192ff1acfe338ec59f4e73788173c9dbc8d92e1b438b7254. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ZA5EF1700324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3025e9c4ba2a6a3b25aed569e22725ed51f98107f5c7128d25c69c3ef6090229. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ZA5EF1700325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b36588eaf772b49722859a2c25b4f4e9eb04cbc47687417ee2d3a8ad5388521. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ZA5EF1700330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13c1e81a82c1d8f00f8e58848ba4c428cb54fc53ef65e3eb448970552ab87a1. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/ZA5EF1700332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddfd548133d90bb9891a37da79ec4bc35f379c55e4cb0b4745b2cc3af6c9867. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ZA5EF1700333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e3016517174c794b9637ea5ecb27791ec189a672c907313b7e438af87bacb5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ZA5EF1700335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8807db3475186dd6366eb47caa29ed14a6bc37e271175e806194240403aeeb0d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ZA5EF1700337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe8f857817c16b256c91bc21a336e15ae62e56537446e2e3e59982f68910597. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:49:39Z), 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/ZA82E2000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed0a2c2e3b542b799b8480e43cb7a59e7ed01181dc3cd2985f837b8509ead9a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/ZA82E2000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf8fca350e370e89e8388579e48c32864e3c59822789154d0dc8e223e0f55d6. 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/TCAGW2318364.