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 0x0ac28ee3dc5ac8c4f833e9821692b982c05e13df24c2c3163d4b693303dbb3bb. 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/db02a93c-1f9c-496f-b160-8b774ac71394.json and https://artists.proofprofile.net/proofs/artist/db02a93c-1f9c-496f-b160-8b774ac71394.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 0x0e6d98dcf3e09ebfda9a1d5363dbe8ddbd3361e5be80f9b59f7a6f3efaeb9661. 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/AUV401932465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dca5adc529c5f7d2cda73b6493de8252497db8136acd79363e00c78d2101ed3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUV401932469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13dc8e7f9052792457674615d225cf29d643c628ab15eb9fc6127f5eb5fd1a0f. 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/AUV401932471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd22e9888bc114ab0e8f8a8f4ffd71c8c21001b8f6785c349cbebab5d7df3e4. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:37:36Z), 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/TWB519908003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f6e012e103d8d586f44330686fc7a8bd78b8418d0f7d351b654024b5c88fcb. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:32:05Z), 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/TWB519908008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686c80602eafd9970577b03ab34af8c63a6b81513109f74bff7b7c4e5ddfe121. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/AUV401932480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40be1f029f67e5383f09bb2feff065f9ef4e28209a257805143c7d9c85ac985e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/AUV401932482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf7972c99094aaea7144e04b0fe17011efa50399c6fb716b4b05088198d5123. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/AUV401932484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238ef0ae99780e4bac160f15ad91d5310a667b0f970c0484f29f74b9aa80a30f. 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/AUV401932510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac60dd5c4af2ffb42d315a393a875d2d4159c4a629cdead36c0ffe5d5b2876c. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:04:17Z), 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/AUV401932511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb530fa0a1341f5e073d305eaec100fd078423311e4fe2b609647bb922bcea44f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/AUV401932516.