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 0x1b673424ba8e6b359d5450973b0f2d87a074027aa85cdaef4aa75883136a6da8. 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/a6f15ff7-c68e-4112-9387-93d9cc69ef5e.json and https://artists.proofprofile.net/proofs/artist/a6f15ff7-c68e-4112-9387-93d9cc69ef5e.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 0x9b0f62988ce0e4dbdec30066ccf4d562d2ddea3a750c0be5faa57024966d01a3. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:48:19Z), 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/QZFZ62140042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352096ad7f7e642d0e663889b5a9b51a9a51e0d76277335974c2407bbb66da5f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:11:55Z), 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/QZFZ62130402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe404113b1cf3f54cc5d849919623885b07d9fa05824ca66f61f9f9c903d864a6. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZFZ62130403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ef15c8ff6c5ab296bd8e4942b07c4f7a29ac700179a1f25585e3b24055cb67. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:19:19Z), 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/QZFZ62130404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99fb304bb040dad8d253cdde3647243f43b9223e6eb9a995b33110bd2cfefd8. 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/QZFZ62130406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67642cf67394489c53e026c28062bd43a17a28cabf6fda48d1f303df1e0d79d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:47:25Z), 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/QZFZ62130407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07116760efd300648a1b764d5d0f08787b9d06b03e4b471dc20f4be9fe0aa2bb. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFZ62130416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14231b485286ea9701cfd95ce7a2260d2b84ab8389ed1f3863f332e00d5c59da. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZFZ62130418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfffc73150c871a25cc5bfa6fee1b4d93b7ab03869969f0fa3c3613775d5cf7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:04:11Z), 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/QZFZ62129223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ed66e3f0671f818b4ae50476cc32f76ee12368b024d57bf5f564f0f148053d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFZ62129224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17283dcb1290f9ce69980c559ec7831fdb26a0a2468f4c0fc3fab6b86e96150e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:53:58Z), 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/QZFZ62129225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96d68a6d7763013b1aca2289cd47633081529eeaf0dd4e4bf9e8d4cd8e4c52a. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZFZ62129227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd269ca3c5c6c23e18788b7120c6c60e524268e7bd22dccb646a1c6dbd01ecf. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZFZ62129228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e4d2b5db9dd04513a0027df98bc694c443b2ed50aeb7f27e7ecd97616bd514. 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/QZFZ62129230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cd82166be803ec94a635844c87af6cd04ac10622b7801b0b0fbacbd9c5a173. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZFZ62129233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6ab120b5b138642ae20c4705e5bfd84139fb313cbcf89252e7c1cc93e56c05. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFZ62129235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a6a800d0273cd23ea483564f233e9ae125e92ace6861ae8f1d0d1a23cbd3cc. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZFZ62129236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddaad88328f0853209be4c3f591e12dfb479311d148cfa292a37d277475bc1c. 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/QZFZ62129240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7e21c18014bdf9a4d338e01fb5ebfce7813afdd9ad80b1b1799da63f40217a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFZ62129245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaaa202410319577f3d76a727e6e412dea066955e27be818477cc6c428374ccc. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZFZ62133926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc3beb4ff55b8c2c939abea8d69d5414ad578a1ce77bf454319ba3424b8cb12. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:03:08Z), 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/QZES72179453.