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 0xd63550a7af85465065fe531a8253de40b9d473786e6d8d6cdce986c7426de691. 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/451aab8c-333c-49e0-85d8-f7767a3dac58.json and https://artists.proofprofile.net/proofs/artist/451aab8c-333c-49e0-85d8-f7767a3dac58.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 0xc017e0269d3c73340dedc38ce17f1dc7ad7f768ba9d0c4b3feca78ea4d824427. 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/QZNWQ2473466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ad633f2ea907ac6c22cb9d028d060d381e2d9726f6d5ccd0ce2a40cbeff794. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWV2400519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c7c528924b23ff8adc187bd0f144c99a170a2769e548f834477dc7bcc5eabb. 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/QZPLR2421660.
La ragazza di Budapest (original english version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd202d80b0253e2a9db4b2ef976d5e7d4e4da47bfa7fc63b7c62295d96ab70b36. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:30:12Z), 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/QZWFF2415952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c44a04d19be2f2e55410fccb6776b8e50cac6b99b71d1ba44c2f3614496eb81. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:59:50Z), 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/QZWFF2420361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ca2c9b93469677a18a19b3837c24ab23c7c8de5fe14bfc51d695cb2709406a. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZWFN2430619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ccedc4928a8e61c57de9ea7a84f1e2c0e49e679b6a07977384b6d96dbe3714. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFX2498571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c53ec6466865a809a661d6e84bd7350869e9dfde9fdad01fdd2bbf3dd8d670. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7R2410956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8f325e20e8b4c2c89124f9068841adb51b3f356222fc2e49583f3984cb6daa. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:51:40Z), 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/QZZ7R2453343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae51245d970a33cb6d09dbc7a60654f6ea1ac97c4b762975aafa71797d74ea3. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:38:32Z), 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/QZWFV2516888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb85a6b850ee821f671df8460f79559c7285f9e6d2e6a386cba2704035c2f947. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZZ7M2588566.