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 0xaf3f376316046cc1b4237355e6269ac0f49061701e234b76c4b47edda5958fb3. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9560d864-ead6-462b-9e40-64c67737388c.json and https://artists.proofprofile.net/proofs/artist/9560d864-ead6-462b-9e40-64c67737388c.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 0xf954f5f2cac418b006ae9e61aeb92ddbf475eb157be8bacf78b86194baa3c608. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFK2363315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c344c6f3f1f431fd986f898d96d9636fb8d892158d1d448bc2c891c4ae444b3. 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/QZWFK2393009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc717ba8a9b57e840edebae530f55ffff0bf93b03d6f1e5300be21043d902ee11. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFM2375542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c9112f06901a75f2a4aeac6ff407ae25c4aa273a287bbcd82afea980896cbd. 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/QZFZ32489384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789c6c9bf2342901c4ba8ed727924f144cc0926b88762be938662d9a82223b49. 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/QZK6H2490445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07f4e3396b648a482893902aa53ee69e9d8ce418d97284c6278e9fa097d6b08. 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/QZMEP2495622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111d52e1e6690af01e8af35ad6fb8d928711179ea6110bfbef8847b29442dbbf. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZNWX2479128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a406a82ec76c16340f5ae652a6cbaf6f79768eb3ab74532c2859e18b86e79b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTBB2444565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75117f1cff719f379a9fe2eea61e95a1fe3746e25668c755f40f238639accc3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:02:26Z), 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/QZWFQ2426038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abe5796e51fe752942f5e5ba3efba9cf7722835376fe789b7d7c46f4c67e5a0. 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/QZWFQ2448097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a8f7d5ac0492291f4fa49a6410fd8d2cd7b931339670e61d314de6db6d33a8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES72517514.