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 0x3a4d31921d2dea84b3268e2207401d971e3a1f420db5746f92afa31d11aac57a. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9569249-9673-43ff-8c1b-a5a1fb7e5b57.json and https://artists.proofprofile.net/proofs/artist/e9569249-9673-43ff-8c1b-a5a1fb7e5b57.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 0xd535593ed11d6c2a33d4b016d533c716b85dbafd6c525876755fb9a29984140a. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZFZ42458254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b681bb7eebaf4e3abfb39e411a69b61a5e958851e833a599828204fc6bd578. 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/QZES72484505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122b6de48fc4b77fa008c8eeea60a15f542eabff5f0b700289c54811966d51b1. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZNJY2470943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508fc34a880ee6b39a95a52d765046bacd3582b59ad19b786ba2d918874bdb79. 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/QZTVM2416241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a6789f9dcf36e6377a0b9092e60a2bc3277104ffbbc6d37d78ec760d13d96d. 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/QZFZ42527845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508fc34a880ee6b39a95a52d765046bacd3582b59ad19b786ba2d918874bdb79. 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/QZTVM2416241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77179d33d6b66bb4b7c44eb105c8af709e9449b2a0a3153bb2d0ea2552124cea. 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/QZK6K2378376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122b6de48fc4b77fa008c8eeea60a15f542eabff5f0b700289c54811966d51b1. 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/QZNJY2470943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270cdb0e97f3fcde3efb974e4bc02b32765a1ccfb01a8821ab1b8c3e4993ea57. 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/QZDA62559502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd535593ed11d6c2a33d4b016d533c716b85dbafd6c525876755fb9a29984140a. 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/QZFZ42458254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d1cadb8b438081ccbfc7969c5e410283d01f0595cba0d941ca408ee193bdf5. 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/QZGLM2018459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6d208895d0d6b20c81c59e8eed4057604a6b012ddf4bd7e8bd884c4a2930c3. 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/QZDA62559503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda18f033343c15520e822dd1a086b5d6132b175cab69550e5c2989f668379a4. 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/QZNJW2465929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3144bd05a4ec2a5af6c292e7daa120fbb42a697c7949abcf53e11892f8cde31e. 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/ES71D2300398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f51ba3888bc3d763c4bcb95259774e14d84db98a2defcba646ffcd524a27f5c. 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/SE5BU2585384.