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 0x244294c84906e5a4233901792b129cce4eea50f6c2aaeac1f17f5635a55312e0. 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/7a3bc464-6671-400b-86d1-72f8b1800563.json and https://artists.proofprofile.net/proofs/artist/7a3bc464-6671-400b-86d1-72f8b1800563.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 0x383731363f5d5f67d41ddb2d77681938fb5b29a20581bfd34f189599a0ab5f93. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT3F32421356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49384e87ac80458d902e705b75b22eaac2eb8c837c72491e8abf09537f7aacfc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT3F32421357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5186c3ac1d94ac44b56709af57e3b4ff973a1478bc337947363596f82bcd74. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QT3F32421358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc628381c9d41eb14753d613461349a7d74b564d8fddcaa1c7d502da5732933a0. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QT3F32421359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf8fe5cf7c03338cf14595d4eb584d69ab99e0cdb95fc4470cee6f31eaba1d0. 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/QZFYZ2535908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38dfceb245aa614c49769a241918a49c02225cb2c49ab1866d30967f946c639. Chain 2 (Bitcoin): anchored in block 957629 (2026-07-11T23:44:46Z), 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/QZFZ42534549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c7b447485aaa768b42209f61bc75d653c901414f6f7d1eb17b056721d44a1d. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/QZFZ32570004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6713fce6f1b60433e68578e48f8e96564bdf78603594f1591c735d283c1eaf6c. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZES52595583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10acf9fea33f3277bfc24462a7f51c47fd3ea0a9dc90688f34c939c35b6b3c4. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6G2544314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273acbe1d7343616a3e5bc44330be3e0b3f5fa391fd4ce2802a6a060760dc926. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZMEQ2582385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8c627104a5309d801d63c2f39908347a516c48d677b68e3b13e33fa4656fc1. 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/QZWFR2530328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3d3f7b46b8f9b873a22fe0be8e6d0f565eaba93c56ad3678a85f63745bcdf2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFU2592911.