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 0xc86678b968213f1c1c0b5de81a87c6681102a3020b28dab6f9020082cc8631ad. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d76b2d07-c341-4151-8085-c8674b5f72a6.json and https://artists.proofprofile.net/proofs/artist/d76b2d07-c341-4151-8085-c8674b5f72a6.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 0x72c8e43da8133829ad574a63fdfcaa571c7f7d942d2212859145ef86554f9ec3. 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/QZHNA1960297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532ba8951259250c6ff37893acdb2935aaa48df523b746985c5200cdce4be3d3. 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/QZHNA1960299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fb6abea3055e9cd82b546780b311badf897e037b0923c4b1973b61717bc3b1. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZHNA1960300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa7e446a6065beacd521b17123c604b702a0b5c8e072bef48d6785a1d5e2bf9. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:14:59Z), 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/QZHNA1960302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb775b8063b13d22fc4b7391b00b4141c4b3f62a06be711fbc4481fbcbe506de. 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/QZHNA1960304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc093288801569dac74584c0077506203b65d8dbf12a08a7c3d1e70a98b14018d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHNA1960305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe1b8d4fdd646b7ef33f21ad6620d2330a9caed0c6ae849029096e2821bc75c. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:54:46Z), 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/QZHNA1960301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67829cde524330c92006884456f7a2dadd5296bf6622978e21ae7d6158de770. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHNA1960298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa216aa0e9883f874268a1287a43491ecae67eeda0719909f6e72639c3fcfb53c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZHNA1960303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0810f7f9a58db2972fd339616b27c628205fd98d178ac9e2d031aa46412b785. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZHNA1960306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7334fed893503a92f1c824042e66236844e7d8cc779fcc7bbb902053a13f41. 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/QZPJ32255561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e933daaf895f3801ef5acaf5e14324cf279eabc53afb20b90404eb724aa8765. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZPJ32251543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf697cef547cc4fa76505e775e66f7844b8597d6c60d830c08339cdf2ceae0010. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZPJ32253756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7fe65b978b45bbdea8d215478d938b33afb8c2edaf9b2e40bd0ebdf89027cc. 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/QZFYZ2038983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478daeb5f97bc8c73e0b1f3c958b001db25fbe279dfdda41db3dbd9c5327aaa4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFYZ2038985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629afd59e5ea5491a48ee28cb8d0359691db2b1ab111da82f740893673423bfb. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZFYZ2038984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5c4e90a030e5326d208d26ee6a1d039aeeb157bcb32863533c4004e6e12c85. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZFYZ2038986.