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 0x78fef033e734b8c25316fca6989e043c0fd265ecc086c95d269e369eb398dfab. 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/51f42c39-56b7-4ba4-aa4d-910f38257658.json and https://artists.proofprofile.net/proofs/artist/51f42c39-56b7-4ba4-aa4d-910f38257658.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 0x1ecd0c8d1dccf80d0254e5f0d4ece5d07167ab9d5a3f1050817ddbe25e86aa11. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USWEX1500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ac1263428e94d264d54d3fe410edfbbc68779d973f2e33ebf0072f8c716cf2. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QMQQH2010207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa605bf7f76e7e6d97017db017799c959768ef63d4f46787172bb0d30b98ce8. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:04:03Z), 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/QZ9EW2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7856507ada40ec2deaa6d468ca1c3dceb816100d6338533099ee094155035bd7. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:19:29Z), 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/QZ9EW2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d515ecc495abf4b4405db39c56505d62e114e90185a0d4d0cdbc8455adf0b9d. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:32:09Z), 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/QZ9EW2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad19a99e1c710e4eaa61dbecd47765543e1f78a9a0e3b0bcb12a991d34cdfc28. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZ9EW2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4442822334df0c454a5d5bbe6c15f88c8f600b37f685ec5279740f736edb7749. 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/QZ9EW2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad19a99e1c710e4eaa61dbecd47765543e1f78a9a0e3b0bcb12a991d34cdfc28. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZ9EW2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68fe714d08ec7ffc099080ad7f54505d168a263d7c7396e71a9c90d8447cc73. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:18:39Z), 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/QZ9EW2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b511fefe7cc79e4af0b5dd64a80d4ba506e47fe45228ed24c9972b3ed7c7b2. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZ9EW2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8693a942a06761c910bd9d27603f0d16869024e90dd245649c41b47803c23859. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:05:00Z), 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/QZ9EW2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985d57668cbf553ed729c5d16b15c316e625803a7a0df1daae157249777a264e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZ9EW2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85205c8d7d978a4366bc9350be3e67f30e079c43633fb94073d62add97c4ce99. 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/QZ9EW2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafc58f4e58b18af3834ed0cfbea2514eac38376001da7230188eb2eb314e3ad. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZ9EW2500012.