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 0xa1c3ee88437f6537cceee986405ee9f2487952dad26424154ebdae134181291e. 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/42bb1bc3-3270-4dac-be12-b0ea86b66dcf.json and https://artists.proofprofile.net/proofs/artist/42bb1bc3-3270-4dac-be12-b0ea86b66dcf.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 0x8d6a71a3f3a1da5c567409801b66f901293da1135442c367973972912b82ecab. 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/USLD91752241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e693895fe1ac57ba04adfbe95d51fe6057f0a98b0665b516147c88ceb07ed2. 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/USLD91752242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9136b940e1f427a3b93d7c3c2fbaffa8f42457a3c8e4b68abdc7fde89e9231. 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/USLD91752243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d0f82c4975480bc2cc1723e5b6d2363afc678916d0226d166413596babf823. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USLD91752244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a5327a76d4fa9589b2027b24f006478d6c1818f9d6e99a0c83c50418c36198. 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/USLD91752245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c721d61babb013997a9be270fbc0c2afaab4d75fa162dd4b0577c50515f6680. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLD91752246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675ebda93f064a23387f0bfce9bd6ce315615ce5601671407afe5c94b0177fc8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLD91752247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8313bbfa6bdcc3e647b278eba2429778eae818b6096965956c4eae902590b868. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USLD91752248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e2397382c5b4f7e4f3a77ae68f56b09f9987f3500b5c2d3f06b1a9325184d7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USLD91752249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4061e01d18ab6bdd90b82524a5ce986a55e184cbdb30e05f27ffa88ec21e432. 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/QZWFR2300768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f515c3a5c6990a16e2efb2385ecdcd025fb25a6a0bec8342be221f8e7b1165. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:39:05Z), 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/USLD91760754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0602047ebfc3cb6eda88a9c8de0ebd0e9456c8cf1bc59853c2f0b5e6ac2fa01. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USLD91760755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec7ea7f5d0b7f51117ac35104b64daa018aa9ebca167bf08bde168b9bb1aa18. 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/USLD91760756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8ed8b81fc19616de6ddde58c4b1d28deb6ed927ad1ac45e76e586696066950. 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/USLD91761437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb10c68f50a64665ab4fe7f71907c0cdfa50e4f66500c38cd204d003377c3127. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/USLD91763488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89045e9c3b21efab649a339ab7c42b6e30937cd808d704abf6f04f2bfdf2ddb. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:47:35Z), 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/USLD91763489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2ed487e401d2eeed5b1f8e64c536f682e301d11b74e7d1d4b13fdb9b6f95e7. 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/USA2P2508005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cf9879b71ee33eae61c7029ab931a9b04608e927294e72e7547b6270686ad7. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/USA2P2540383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0320322da670e4bd3b16e493c9764073f84e7eb05500cfd9ca1bcf6cf5220c3d. 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/USA2P2545268.