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 0x0bf6cf385bf3111dac86004bacefa4c0cc302c7047213dbd6a5821cd45424fd4. 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/b677b563-b983-4fa1-b768-9dac48c51a69.json and https://artists.proofprofile.net/proofs/artist/b677b563-b983-4fa1-b768-9dac48c51a69.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 0x9eb8f03d46c0acf9e35dc981d138a0608d438fc62c14561506ae9a1414456a81. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZ5AB2137199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0d3caa0cc19385bdf3fef0c905aff0b185353f7c6df9372515f76dc04d0618. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZ5AB2141614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ceb529e559c74d406fefffcde6b6aefd3221f7ce33bf4b87c9dbd019d2d528. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZ5AB2141581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65431ce4bf9cb00d37254a0d8567ce71cfacfcebc6adef937e7f54f99e01a8fc. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:32:17Z), 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/QZNJW2134465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f3bec0cb1516a47847a3fca0d2e502b5c6f6edc78680189ef10facc818eaa8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHZ52278094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ba70fb3a481c0e90aa2bb5fa1aa95cb5c2a6537a104abc3bccf1cb68b2386a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB22331509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a96db4df6f275de113492a24b9a76a9303774df21a583743a9caf83c1f6bbd5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJV2455590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68d650d1411f5e1103277654a279efa227c98de3b5de87399fb788092787754. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZW9L2408920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ba70fb3a481c0e90aa2bb5fa1aa95cb5c2a6537a104abc3bccf1cb68b2386a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTB22331509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9d82b45b3f1d05e7d4a9215a23f02f1ab9c7ccac90bd12a4e272ed065599dc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2361821.