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 0xe9f9881d9c40d676a4f3ab03872e5a12c68aaf02657b7943b53b384fccec5889. 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/53108fac-1bd2-43d9-8805-fb7d4f5a0c29.json and https://artists.proofprofile.net/proofs/artist/53108fac-1bd2-43d9-8805-fb7d4f5a0c29.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 0x6ab449c3038e5423c53b03c0b38f4c309afb630cd6f02c97031ab0d53cda4dc4. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:08:16Z), 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/QZTB72512075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06aa6644cc82288395e44e333c3078732f2f959b822e118a9be6aa1bb2835698. 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/QZTB72525265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4815eb5999b4f199eb510ea885bdd629d0a08c3a9ec286c231047ae0f2e17c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:45:30Z), 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/QZTB72527137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61eaf2107f0b5d22830df6abf90ac9ff2506ad44a4d4593ccdaef07cf9a2ce4. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:52:49Z), 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/QZTB72514596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276d7ab2e10e307f1390172ce4c60062563bd57f622d88713f75ece5e15fde2f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB72507442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdc19a799eb583e39a8e3010ff0d00a1f35e94e5947f0ba41433a398bf889da. 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/QZTB72527142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9975c74e7a4ce8e13d7bd9041eaf944d2cad06710e226960a0d420f32f33cd67. 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/QZTB72509672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d8f390bd9fc317606e75ac221105dd4873415db48e475ac326b54b5ee14b76. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZTB72520594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a41efe6611ffc5bfc80760554e7e501ee20826714283ff56a25377a34b1a86. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:22:51Z), 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/QZTB72512102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416d991c9b5f6be8babd5ee50194dee9f7a5930d296756e980ab57a88c552b44. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB72525280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359f13c11a80bb7a02b4b3fedabb2859ed1ad2f7de12595cecae8bbd3ccf5595. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB72520693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d3d5132140e8958e53f74a93f9fe7cdd657a10970872a0d44ca6e969bf58b8. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZTB72518001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454c9849982734e2f7ba0871ec2c1cd6ec8b624480b9a3a18431098ad9655ec7. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:31:36Z), 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/QZTB72520613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87251dfc06274d2686fcc8c995accae28301f227e65bb27b7f4883152dfc2ba. 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/QZTB72534654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b89f9c67314203d4599dc69d699b7ae51627e0736b7faf365f77dd5c4d9445. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB72534656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d8f632ca4009a3a4cbc46004588caf144580c9b6e50903d408987f9a0831d2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:52:41Z), 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/QZTB72553790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286d538b54d4e811b4b432bcaf438f822dba8d88e6dde33fb5038c8b721d5396. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTB72535939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4d4983f11842236e144b1e8a9f8e5f2b7ec4c16073b1fd85503761cd63ce88. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZTB72551301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f9514eedf2e8a22b6b9d1dc2a2f9e352e7f4f1af5ca8f09a99fbcdb647a4f9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB72534649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92209fa11bc93b07802752e8408bb935fb93ae43e89bcbd19b0036dd692ec307. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:54:53Z), 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/QZTB72534621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeefdf586c90c232f63cd3a703b2f4f6dbc3004e82cb772abfe88d72de5f9b1a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB72534639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2362c62d3d6d47b60663f5853c0abdacc4143888a90e6506fbbb91b2fc927bc. 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/QZTB72532753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4416a09cce6accf0d76745d00d0f454b77f4438ff25662983ba16a8675ba86. 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/QZWFH2516649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4591014021c7ace2826bc852e58f9e6bd4139ef3df1297cbe68e063f3e672746. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:21:40Z), 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/QZWFH2516620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b60eacd8ef0da6b519bd7fa92420ec51f86e257e495eb90797afba2016d342. 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/QZWFH2514031.