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 0xed52c31f2c14a3c9c5bb0e46d2c5421c43ce18822e6b8e60af666f52356c02f0. 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/02b4c0e3-92b2-46ce-b887-0ee09ad1f5ab.json and https://artists.proofprofile.net/proofs/artist/02b4c0e3-92b2-46ce-b887-0ee09ad1f5ab.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 0x0b40312a2c9d943d994e0c089a2c5193a1cbd39915431b113958197d83340c0b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZMWW2226718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12650890037c715ad77c3be3f3f8738c2bdeaacbeef7bb5d191cb75b799acb6c. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZNB82361834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9aaa030c5f6174d571dea0e681b7bcd3cdf66307305b4fc6b07ee483e1ccaa. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZNMU2324458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f5eafdd84324773eae4f0cf02a0a431a171b81529ec70f011006fda91d1265. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZNMZ2319187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0504689bfe0c49912c13822179f9094795cb0a489e857ef922606ab5dc50e99. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNMZ2319188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc76a624118fb40f63526725d88903fdff3a4cbc9cb2659c470710ed6d68529a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNMZ2319189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee1966b2c4406b42260866e4537ef8570cb0b1fedd469305311dda2596509b3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDA62459523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150fa4fb0a93e7e944702f537e4700a13a8fe6c513fad7f520a040b833a4d31e. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:27:54Z), 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/QZDA82427438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c326838dc925d023ebdb1774a968b94eb0425a85ad96f981d587cd648e9b59. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZL382493670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbad886e55d5910ae03bc0e13d3ace1d92afebfe41439c26e616a9271fff26cb. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:55:19Z), 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/QZTAX2489912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10263259139f4b9d6d52d67fe54f9eb847cbc3bff3f433b76115615fa2db260. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:27:29Z), 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/QZTAX2445187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb85a18c9c81b75cca16813014d31ae37a0175bdf578b4fce75f93b3203fc9d. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZWFJ2473531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9966f8ac0c59841b4db225ebdddcf7cc246c6b11d552e1a011c2b9f351c4bd2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7S2503248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0156b4acf2448f615bbdb7525edbee5a92aae0eb81ee0c10204c1b4bebf0622. 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/QZS7J2300978.