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 0xe92e473330ea65f48b3f9f9fa3cad1bf3240d578d12a683f60ba47e24ed60bc3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ed01d53-f7aa-4b59-9c2f-848c902c29ff.json and https://artists.proofprofile.net/proofs/artist/5ed01d53-f7aa-4b59-9c2f-848c902c29ff.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 0x6542127c36af07e3d5169fd9a9831586f1d18ba0f0739d9ed3a5005886a2a92c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTBB2246533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea12fa234ca15da10b5d9662e75d6bd217b74551c8495cc284fd4bfc3c08f5a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTBB2246534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a9ffaa12f5705dd8886823ac9e98c73132843fd06ce31e3181c3ad4b7ee4da. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTBB2246535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc5ad1b7b99aedae7104437442d2405dd7e389616f966316bf6335b63f452e4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTBB2246537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68afa60e68f99ea5db11d62224aa3cdbf07d29a5b0e2d898dc0473a61cbd265c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTB42275210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd72f1fa2682a4ebbbbe18efefcc7c441e06b4ee2fdadb1f6a36bd40b2334052. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZTBB2246536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf591d0fee7a6b3a82b0e89d67cb18c0ee0776918d1eeab3d673ab30bffdc310a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN92467739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fd37eb8dfd8d9dd74cd870d73161c0731fe2e98df71573e9b3965f46ac829f. 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/QZHN92467743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a14bce5921d07cb8c75d7ae66c606a091e597f39dc8e755f5b4e99a0147143. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN92467744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e6a4aaaa7521974d2d8c2f5509aa8d0d74fad00ef9516bdd54b5e28cc3b8e3. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZHN92467741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173c2a79f4470f2bcc8f50981eb3cbe7d58b6b389d4ad5b4a104ba42167cbda3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN62425623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c122c9912eac79c4b70e9ab23346fdf7a64fe03df27ab159d7e2eac12f3a050. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA42433023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad51dd42e265ba4809d27fbdfac86f60c563832241d3ae3696bc9a88eb292c09. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTBA2361904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecb95b2688576c8e9271ae0db9c3343e201e8f22d96d84f94fc35810ec2415f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB92336286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a646e30819f2b18d002cfba1d594a2987e7ac7c96cf9d83ff89f64fdb0d145. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB32312771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b29ba39544ac91d2852a01f94dae3268dcecc0b3f83162d793159862b9a978. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWV2324271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9894db7f4414484dd3822f47001ad856b46dddbc92aa0c8d5cddad5eef5e22c1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWV2324273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4681ca620e5bd8dc8919353eab2a745708ca066ec0fb4586cbf23ed41cb7fa9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWV2324274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24046e61c93aab39911e2f6994d0cac86b233511e7b0a936bbb3843fe87a091. 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/QZNWV2324275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a941bc4952e06ec53e237bdc3476ef819032400243e5f10f4e64d7f67d79dd. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZNWV2324272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe62fe38b263fae99f08e60ec54f31b738fc9a194fb124d3e56bfc050ffb154. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWR2348381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86f7c95ff7e933e757e55bf8f65ed2ba8636e403b9b3fbf1444c6a278bc5fe9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6F2393577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f1dd4804bf5e74e9b8aefde1c9b6090b10f7122cc03f99d5e0b2ff278f3e2c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6L2340101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c2a416489c97b8a3a525a106df6fe290a311ef6a20690cf23ace43b9324221. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN52373364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0284345e2e2fa9e5f3e10ffe173f72ab78d0652c8956eb3fcde3285a862f555. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES82371636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c03d83d62484e98087d11af20d27b9d7320b41ac53a04cda4ff162e04f5c3e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES82349128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cc9bc5ea1dcaa3fae992c6a831864cd2ab09f93b20bf365b23d878b3211af5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ62394775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68afa60e68f99ea5db11d62224aa3cdbf07d29a5b0e2d898dc0473a61cbd265c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB42275210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ffbe0bbdc6fb2589ad37f752f4909537069af3662248253b5015416114dc25. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTAZ2294782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fc362b890e151b8066a90c71d83c264cd5288c2a1dbd98a2022e426d7578af. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWY2239492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbf4af190722f29b50ff8d3bd427ceda6a84a33497b93d7332396dd4293b8e3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWX2223765.