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 0x5bffc9c030982c1ae5eb3df13d72e30116cd68775282d172fac1dd9abdfeb5c4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00a84db9-3a70-4cbf-ac6a-127106ea9af4.json and https://artists.proofprofile.net/proofs/artist/00a84db9-3a70-4cbf-ac6a-127106ea9af4.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 0x7e9b05002b10802f92682c4276ba413b2a98ff2f4f0b082f491756802bea4b89. 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/QZWFL2311537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82386389a09fbe33675d483c49bb0fa2e7a2e4b04fc3edf101d2637cb31a8fd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFL2311538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd35dba873e2211827eea3ef43a913b970aede58cb042b548c427bba684377db. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZWFL2311542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e6a96a71cf1289bceff575f233dfcc47cb60074b7e4651d8c3208019d2561f. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZWFL2311543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9abbf1ae00039376a1c13f02649a7704980f8c02c9155281b60eeb23627a1f8. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:47:35Z), 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/QZWFL2311544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274671228805d1084d881126cbb2f823f3e704be4dcd16969b6d311adcfed74d. 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/QZWFL2311545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319caa8db967f12ed42c818c8c589492859ec29348a6c3efc22e3bca34adab11. 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/QZHNA2452811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078930ed2fc32206dabccb534e70a8235ee597a119570d5522970cd4a1c12e25. 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/QZYFZ2428623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b7df5e7deb700a18d2dd7925157cdb18fa6e69e7d10b0b385edc47c7f37bbd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:38Z), 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/QZMHP2593104.