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 0x32976ec999d46d6aa99f30b4423fd0044532aff9fd733f9a6f3d4e73203249de. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0cb6304-fbe9-46bd-af42-d8ffdcf629cf.json and https://artists.proofprofile.net/proofs/artist/f0cb6304-fbe9-46bd-af42-d8ffdcf629cf.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 0x216c3e6af6496a570be296f64dc9e5aee6cbb881628eeaa5985ae6fb4af541d7. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:54:54Z), 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/UST8K1683744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6330ba36944621012bfafc800d00a08351663ed779b68783ed40eb517e50cf8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/UST8K1683746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae018fb71ae66787f25b3d54959c5ba374cd57e768cd881fd6a02ca8a4b820b. 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/UST8K1683747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ccff218a3dac8b357156542dccc38569728c6d07c19daae17686c3f7d46ee4. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:16:57Z), 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/QZ4JJ1601712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ac22250118acc01f878d029737cb2e77ac7f348cb3c665fbe1617ec78dc81e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:58:55Z), 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/QZ4JJ1601713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2683dd68ef201a4d953bc4c6bff65b846f55d9631eee8d6bd47101295a900f2f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:06:15Z), 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/QZ4JJ1601716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f616f2064cf2bb38a996a1d59f5c8f0420d5e7ba99439dcdfa9b078ab28910. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/UST8K1673807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1906aaa7adea6f75f67cfd7ecb9b1ec6086b66d0cd5493df7e10fbd3d8caf4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/UST8K1673808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33011b27a54919973a9d686b5b9031bcac639874253f68296fbaca5d2de8af56. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/UST8K1673809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21db1a6405e490ee3f8b0c89e3b5c36e6885fc223c0da8e0e31e97ea73827fa. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/UST8K1673810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb347a25cf37895f2f0c4253c92d8a05cc682075ffb3eb1b60e20017668059e32. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/UST8K1673811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467c1d395a6720929eaa35856f24050e517287a9ba14b050d8ec4c3225b0b3f2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UST8K1673813.