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 0x748fe7af735778970c56a16e2a4a064cda7cf2bcc5458670dfbdcbe575e3174d. 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/2156b4c3-5d16-4277-a537-2e4a6ea02c9d.json and https://artists.proofprofile.net/proofs/artist/2156b4c3-5d16-4277-a537-2e4a6ea02c9d.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 0x9687bea0e1c4f840fd1754535ab7524a813dca49559304fd7921b06935697fa2. 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/QZNMX2220412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe6181b7dc204e3863cfcb2193214bb3f725ff7bc882b92064942490fc24cbc. 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/QZNMX2220410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eba3abc0ed89da3010a899eb19e24cb6dbdf9c17cf93b03b854685cbc88bd89. 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/QZMHL2201541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2410bbe41dff8376f0c67bf7dab48294cfa6527e8b9465207734d09f5f9738a8. 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/QZNMX2220409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7d9dda010ed95a5ad5729412a7bdce7d58d60ad95309549cab19c6bd63608d. 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/QZTAS2168727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838e037d092bd2e32b0a391e89847d492fd8f38924a8f52e89ed17494f35ab53. 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/QZTAS2168728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0efd93f5d5e26fefcf9bec1a238db6944a001a50124c695b61e25badeaa2f1. 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/QZTAS2168730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bb153f7dab06d973704aa5dc0fef9663e2db3e0bb0300a350789331e61067d. 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/QZDA82006714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcadf3030836fb6f7c7392ba23dfb29b9bf2f7d2afabfd168dcd25a40b03191. 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/QZK6N1981643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7e83ad0ca4de5f99d92a0e25cdd4bf736430216661c2b2abbd40beb11c61ba. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZAKB2134775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54201967d9f5277906e6c4861b2111d5aec3d4899f7fda587e888905c18c7755. 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/QZAKB2134776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a34dd58561c1842214088a81b8e0c9ee574a8c51a868e466eac2708aab76a7. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZAKB2134779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb97278ec715038bf685769307922883b4dcae511633402a5c86130ad6df61e. 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/QZAKB2134780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb736853cdbfc9ebe399c2c93411866254e3378cdc77cb4faafd3142437c666ea. 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/QZAKB2134781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad82d6b522132bb7e60836a9c09b056b5fbcf29fdb4ef62d1faa8648f8986701. 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/USUM72311786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eba3abc0ed89da3010a899eb19e24cb6dbdf9c17cf93b03b854685cbc88bd89. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/QZMHL2201541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd213e5d021754b8a4a66c6efe0cc68bc0e80fbc8938d71fa582337c527c9fd3f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6M2237958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026889ac058d9b4df1143a366c2e59b929bfad7800abbcf3b72c7e6863a5e343. 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/QZHNB2216431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1cf43dccb7569b96a490f59bf25457c37b05b327e7d2460db0544b0ba0060c. 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/QZFZ42239289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bb153f7dab06d973704aa5dc0fef9663e2db3e0bb0300a350789331e61067d. 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/QZDA82006714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6326f35d13edfabf408ae1d806fdd5a3aa204577c03cdcb9ccdcff3dc1cd06. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFZ42049515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98148cb98556b8188fd1480dc52e839a0ec0b13a4fa5f16897ba35b308301a6e. 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/QM42K1989754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcadf3030836fb6f7c7392ba23dfb29b9bf2f7d2afabfd168dcd25a40b03191. 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/QZK6N1981643.