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 0x5d7cb98825d9a4a433a3cd7c49a6d025c4897f126d58058ad238e2decc83891f. 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/a3ba78ba-dda7-4511-84ba-ce316a2d8d32.json and https://artists.proofprofile.net/proofs/artist/a3ba78ba-dda7-4511-84ba-ce316a2d8d32.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 0x0ba3d5caedc3360565bc5457bbd48a180a6c0f3204393228dd7f84ba0b33789b. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:22:10Z), 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/NLG661000117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b5266a4c092ec18e455c2c21ad2f90e5781633222442e3432bfb2a6ad8fef4. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/NLG661000118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b600d6fd3d8776b68debfd82b76d769295aa1407559fda2b0005035304f095. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLG661000121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6b3f1f12e923af701fde3f0eb64f45798b9ae3372dd0e110e988a5b8d332f8. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/NLG661000122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abf85125db9ac967bb6267835e32fcdef1ad31c02d553d3d280bd6754e5511b. 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/NLG661000124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008cf58e8216903ed2e0298026952b9b72e479c64716390da2a6b77046ca78f6. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/NLG661000132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31e74bd1d8bf7c658e809e127c78b4a036902bc9bb177f00bdf55c5afb030f8. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:44:47Z), 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/NLG661000135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa24c81c48cf42c3e14e23aff6509efb8dfc5795e87cfcef2e855520c1baec3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NLG661800498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae2b2e59b232376844c19eeaae6cad8dc3f7fac4b8890ce62489059cec960fe. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/NLG661800503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa480dd822002db39bc405764f258d155fc2e69dc1f377601b978cf75d58b9fb9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NLG661800507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889ea62abf68228306980e0e3f56b55a5bd9b97bca9690a7e7f21df6ac07f742. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLG661800504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcca4eb95b8937e8b8b23ff9e6048d6366bcff70d3ee8d2eb921fb999c68d91. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NLG661800510.