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 0x4bed9a7f86f715f27c152910523b65abf4e33c116b95e80e9d0ec92e037ed8fd. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de0b778e-8d2f-45b2-8729-21e85e871a16.json and https://artists.proofprofile.net/proofs/artist/de0b778e-8d2f-45b2-8729-21e85e871a16.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 0x61c72a3729b852c3ec57848e885ea81f5a5fe6d411b440ea9e2dbee43ac89e06. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DKM1K2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad1097bebbe39b0d8320a66d5399764ee4b842f04f3fe550559d5db7cae3aea. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DKM1K2400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339ef8e5018bf60c005988bbbb141e58a72978565b4dbdbd754d28ddb4a5984f. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/DKM1K2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d19d1867892f5584b006a60088daa93b6c0da537aa5b499476f53e26e4e4ef. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/DKM1K2400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb7e1f66924a1a10bbda44cf91f9c62433b2c8cae6d2336f998c5cc0fec2848. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DKM1K2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d58f617531a6264a8383b4f5371d0314fceb41f4b7f1720ccbc1c42720becc9. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/DKM1K2400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1d954165efb302036cbd3f30ba343d904cf79a1e544468dfcc1f52364f6a80. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DKM1K2400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03aa0e1593add5fadc21db9e21d550efacff117ba28b4c38a52b4ef84bc0f26. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DKM1K2400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e54def8218ecb78726ceb8daae7ee92097678a4d51b97a27903517fc36e0a6. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/DKM1K2400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb68ec8cfe193d6560443d704b24988e048ec7a601ea69462892513e65af8a0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:55:39Z), 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/DKM1K2400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adfee4789d70c812d512c548d06fa4ce0f0fa171b7056b2e4cb223d1f5100ce. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/DKM1K2400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfceff8ace30c1ff5c839c88294db45f9b2b4959f8de3e6ba5e61eb26b4cce779. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QM6P42584388.