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 0x330ae760739edf538baeb35b69d941e33bc8ec2d1f276fc52c1f3d296d370f8b. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ad9b466-5db6-4a17-ad5d-0f615359b0b3.json and https://artists.proofprofile.net/proofs/artist/3ad9b466-5db6-4a17-ad5d-0f615359b0b3.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 0x43d09991487b392e196ef4f933d7cded04c31a1b5373612ae2119fc5704481c3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTBA2526368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9bf9a01b700ae72de75a4cd3e87061683b8dbd2e193179969c519d7783c359. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTBA2526369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e11d20e637b76eaaa193a4bee6fc7f2ab9a92a19d25549c84ab7e6226ffa22. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFP2583661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038642af91ad57333a42e5cc3b342202b469c7b5e530fa3d838f2a05197341e2. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFP2583662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a6bf71457057002265ca2fbf7ae87a3bf8a2afd2023c806a2e135c118e0ecb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFQ2540418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98661b9d92ecbcf0e5c52a104ca7e5fc6e5037857c70b72b58c23437f96a9b81. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFQ2540419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688c2eb2c38ed2e561e8736f4c4d05d6516dae8806ba5e6746c7c89643f3820b. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFT2542347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28e75c8434d7a535ad2dd48a907c459b91e0b3a2aa1b14a9ca2764054522df6. 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/QZWFT2539931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0624cb2a842060c2d39e9749424d0b262a7c0a27bfc6c974d26d7932b7875997. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFT2537016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081803c74b083fee80aa3e2cfb1eba2c239532bb9de6f49c80902b4218d88af3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFT2542337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff56fe575172a97941da9a35389abb07d6208f14cc5abdd6261c757e13060a48. 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/QZZ772507440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa23907021a4eb7113c74a72f23d6821f697f21898c25dd72d8091f150ef73e4. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZZ772507441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246adb43778f0e38d712fe71c7aeb0b9e1b2aea3c3f9aa13deb170a0db1c288a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ772507442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5fbc54e138015bd34defad9c9636d036c32a1316dac419a0dd52fdf292278b. 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/QZZ772507443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa400a5c90c3c1ec5e9c588deafc479f9ca9c534da7855c9649c59ec708668407. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:23:27Z), 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/QZZ772547260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6fd988ef6fb09193fc459b3722fc2fe93bd1f445ab102fb32925b7a223e99a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ772547287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e2d91733004aa01506702d4f493fb9e6b75177ed4d946e06ceaae63709b911. 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/QZZ772544458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d62d405e4e3bc504f9fea02c621f02544acfcc5da885c3a196f2bd095fe6456. 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/QZZ772547315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52faa98129cc8f69ace5bf431f04cd4a7978c09dc355cb257760accbba88847. 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/QZZ7X2582458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb240b0dc2b9019e2cc3dbc9802fa762309f6f549a3a7ef38b734d113485848df. 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/QZZ7X2582459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d9ad0e674058da009482a128ee185dac2d8b3eff6f74ea6d4186b66ea0f237. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ7X2582460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c523748c35a068aa7d224a7f2715c6514f2b55661477411d38e6ec9296f416. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7X2582461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa942e7274db054ce8d23c3ee6f2dc6b9ca14fe1753c882f18a6de1faa25a3f3d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QT3FF2505723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bdbe56cb115e73d8ad4a1f004bb67170b6113acdee3b99923dba5937b3cb5a. 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/QT3FF2502336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a7a7cf4c5ff3d765e9b45551e0438b264dffec2dce1198fdda7cb49c873d34. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:53:52Z), 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/QT3FF2505785.