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 0xb67c2a6530a957929d0315aebcdba810286c6e4d69d83332a4c9f5d649f9f894. 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/2c6f578e-d5a8-4c56-92bc-3d949d5a997e.json and https://artists.proofprofile.net/proofs/artist/2c6f578e-d5a8-4c56-92bc-3d949d5a997e.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 0x21ad63b3c0bac85128b06acabe00a6bd5a8a72054af92922a5fd985489641861. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZTB32381803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56430df6a6b29796b226e35d852298bc6ddc7ddaed5a40da91022443479f0922. 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/QZTB32381804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88dbcfa1085934d8ef2f00d3e796d21e9d8e15932e1564ceaa2e9a9417ee96b0. 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/QZTB32381805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6208d19b3741876971225126c56bafe4044d8ad858d627deba5666e768623e. 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/QZTB32381806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4e55892dc1f8bcebf0a854679ef5ae38878896d29afea941a1c5ca2731ba9b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ32448210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ad79de3c5a16d67135a8e9ea0f8e31f23ffa05bca1375923331953dbe50d1a. 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/QZFZ32448212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f2e29eac5d014870173b219eadf8a1d5b0f9c874e929f1a5e2089379a447cb. 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/QZFZ32448214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057dc14369d3d5ac50ac156f75a20fa447e851d955306b89bf71fb82aaf2a12c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMEQ2472654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3d7ecca42d66ece32f079f3d1d5c8f8b3bd3a93b719f0898b90e94c383ac21. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZMMA2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673ca5de72f659cd8cea3692eccdc641bb1c3d92e1d73420da9ab900e02a7f0e. 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/QZMMA2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3d7ecca42d66ece32f079f3d1d5c8f8b3bd3a93b719f0898b90e94c383ac21. 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/QZMMA2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde91756192be36ec5b40f5d6997dca832fd64d2147e57387fe999a318e81be10. 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/QZMMA2400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e28bb2a6d03c0389f6cb1d203a88205ad889f528a6931436365c9555342b971. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZMMA2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3959f8f35edb3424f0a86aef8ed0880ea6ddab3d87b73c3a530a45ee166fffc. 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/QZMMA2400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ca91549dbb3f14621dac8f2c79a3f79e8b6a0e411249d716a590862eafaa04. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZMMA2400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f46069cf6ce0666c01aefcd5d3b62731bf5b8b2d3cbae7f8b6bd8008edbc127. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:26:23Z), 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/QZMMA2400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1e16729488c21a4e4ad178e7c641523eed2f2aeaccd8a67e3e4fb58de3b13e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:32:33Z), 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/QZMMA2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c124f310da365081a3ade59b7229b24ec645ff091c4fdc44849ee6ffdbda277. 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/QZMMA2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e41264b2010c8aa55498ad52d8067ac2a88a9dfd9e0ad54e30f033cf19b630f. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZNJW2547467.