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 0x20fd21a46a43c08a8ae489ddfc7da6f1f704fb8beb5cea5510634133a9ab419c. 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/1f64ec26-d5e5-49a8-87f2-d0e14703913f.json and https://artists.proofprofile.net/proofs/artist/1f64ec26-d5e5-49a8-87f2-d0e14703913f.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 0x051e9aad9ebca83d0f5536cf26e8151d3d1938e76487f13f8241cb4f40378981. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZES62001758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc014481d7e1a7d0863676ced428d46a766f738c5284fdf899c38aaa24c50c864. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMEN2026813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c4bdff40a754ce6b7746af1ef2d67a7834718232e49b0ead6658b952d0c8b3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMEN2026814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbff178ecede68999359cbcbd515557c3b19cb76de1f08b81a17ff64583e7ff3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMEN2026816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e06eb0428158981cbc8d32d3acfc034772696e5097cdf83fb836591a9f1beeb. 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/QZMEN2026819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf15b44c6a0130ec28fa5155912271c2c26ed878cd97b6a041e1d2e511829dd1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMEN2026820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3adf2d8715addfe57a631acfccf7072808e0d686c6205d9dc7a3382e2844d987. 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/QZNWX2236340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3adf2d8715addfe57a631acfccf7072808e0d686c6205d9dc7a3382e2844d987. 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/QZNWX2236340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0659b3979e65a70ce7758052a14da5ebcd584776482d9aca6d21be9c5a0851. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:38:56Z), 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/QZRP42287738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c9fdabb09a27b9f08db2f2a403bd857135f6dc289f43e7a5e164837daeab3f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZDA82305332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d097ac9df4c6c4d39d57430a06dc2a3143ee7ae3bdfacd0d518a9f4a322a69c. 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/QZES61971695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab11beee6b6df7f94cbc8158745674c4253badea961368b3cf0670e6dcee985c. 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/QZK6P2210340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5be8182db4063defc60154583d34374e91b638d2f80a61d14187e86c8de000. 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/QZNWT2303075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa882d56aec965d8ec59417cea1b1215235f7e3221d62ce96bec56ecd528055d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DGA062215859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2004f51c0d8f2db019630d837120227a57dbd389128d66e894df83b9f5c012af. 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/QZES82265468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb595ac7ae040365289ac2ecae4b6f7b97830982f05ca1b2e976b1dbb2bedf4ae. 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/FR9W12249819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bc577bd3460873fcfa6885db800449129653bfbf9bcf579c46566a9f963ff3. 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/FR9W12249810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ada87621062e4cd962af91c8973704385ff63eff9893e2fd6b3d6d161166c85. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWZ2017702.