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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4401b3b85282fa977269668e463bf056f7391da88294e6534605bd6aa2f15781. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0b566ea-fb3c-4e62-b523-61c458d9b59b.json and https://artists.proofprofile.net/proofs/artist/b0b566ea-fb3c-4e62-b523-61c458d9b59b.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137f97b44e6fc681d5199481e8bdb554c223d9a79ace8ceee08b6d8038082f78. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/INR3Z2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e673c21f8fddb75295732ae8f44b74745718c070b5058b9ec6e2c4f4deec6e. 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/INR3Z2400058.
Hemphu Arnam (Merry Christmas & Happy New Year)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7de6cb6ba8da34418d8c8a6a632231a7e86456d29185ab1c5b95a5adda6014. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/CACWV2521226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1491b20057903eda6b6694ca24b3e8d45daa8b2b2e0cb81807003f5dfaf291f3. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/CACWV2524011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bb65e668b4f1bb35169135d7166f72e69b96896eb87854aa1a7aafe8a466a2. 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/ING212484279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7445b2ab004cd84be5e4c3afbddaaacf0af219314a72691f774b17c276d17a26. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ING212484280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef59d0bad2cec97f7be276709b609a291bbbdce281d01d4f6d759208de412c4. 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/ING212484282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e640765b257342c28c7bc54eb62fb91ca66bdc511853f890817d0b003d43f67. 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/ING212484283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c41f8899780d7365ad3548fac743dae0fa3fa7b43e4733d364bd870fb084c3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ING212484284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6039c9a81845b93af7012a2115eb89452a8326d48a8b48dbd32a25cc515c289a. 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/ING212484285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac37d60c3211879221a96b06aea9880849192e0948fd55328f16b7e6b4bcd065. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ING212484286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac8367f86e0c2d6be6409a973e086ce890b41a18a4fa28351948761ae52e61a. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/ING212484287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e2a75a23bc6e66832423feca0be6dbeb4be85cc665a6d3278bd74da6290990. 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/ING212484288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba130ffcf944d654c9627a5d07cd6e98752e8d9270bfe307d42dc4fe1f5e930a. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ING212484289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0a159c117fe12b491d04a14f65a56f259aeb86f3103ce4381d0c1640e36569. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ING212484290.