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 0x3f029c23bd5fe0d953fb8dec131362c307e2b070deba69141c6d8253f245a742. 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/0141a34c-b208-4c64-9fb0-e0f48de9b44e.json and https://artists.proofprofile.net/proofs/artist/0141a34c-b208-4c64-9fb0-e0f48de9b44e.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 0x4565bc63f762eba1d417ad58fb02e43829aca4ca20fcb212e484b0dc171a19c5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6H2251680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516ae8e747b30fbcc2eec78c8e1e228dd3a8f5c281419febe1fe6a3221ef63b0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB62224166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde003015ab8479a3fb40bf9ca7e8b3a5787fc8dca2d259271f2d2ee3a323e0ec. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFZ42341375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8568fa19ce82aec8abdc734cb54ffc028f0b60159b19abc57c64bd7df9b12d. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZMEP2465817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5c0f4c5dfccfcc8622095dec6cd74127fe7ffbbd3351dcdb60c2129a8b4534. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZHNB2347326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736803f9626d1c297235ad37733ef56d9e3687e6d803371d301d674b97563e0e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES62392823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f11621d74885053846944ac304375b7caeb7c72dc48263bcb94cd2ccc6c17a7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWU2466117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adfc53c81781759036c5205bfc64616636c78559cb18e4ff7d533a8cfccdaff. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB92416802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11815a746d6bd74704b02f02df9e0ab50dbbf1c90f131d5e973513f137d147c4. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/QZTBB2434444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595f0da7e2b09e112dea9eda07870a85282ea3064c1e5711e48bd77158cd1f45. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTBD2492071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16958efd61bd39b664e1c25f7592b4f32cd11e544637516b085f099f03c1522c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZWFL2430277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295bf8f2e57df52a022fe174ba9cb937372de9371c9012dae4e9107de5928046. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7U2443466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831fd01426727466551c9304c140cfceda13bbfeff7096acffb2ca8327caae21. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFZ32572452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7763d2ebdc2ca71abfcd3576867b876b587d8eda8debfaec73d96d26ac6019. 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/QZFZ32572453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fc09a44c974ae9500c42d6105285d128fc3e85066b1975cd7031231cd4d132. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZFZ32572454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27df215c96d885aa69e2508b6156a9e3e7acc6138c0c6fca6beebc3bf9a17e0f. 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/QT3EY2437908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b074a15dd9b811b6bede0a08ee32173f63f040683efbff165c55f3581bb44d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ32572455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf4b970d44eff98ae9385351632e964a714e856406b5f51e7157e15e488a82f. 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/QZFZ32572456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae17357e6c34aca6d001cb9c0c0a19cf32df9e95d06f9255036675ffa570702. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ762409349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043d24b6675ee840ffbf9e41277cf43c471aed99378453246b0944909481b6d9. 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/QZTB22569117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8e9a27de0dffbab901c56c8148b50269bb84551533ca5d0b0e89244948df3e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTB22569118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6833b9036ac1dbf949cdba743b36b0b80cb444e8f84816937abc787a60d56d58. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:51:43Z), 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/QZWFF2528275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabbeeefaacaf138766346695ddb85241e127c0c6968cfc8f3e3de1e589d9cb3. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F72597910.