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 0x4747f6e777b7ed3791c128695a0cb7d5b07adeddc8f087ba88b25d217a7f5d77. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd626d39-9fb9-4b89-afc4-288bd6ac9722.json and https://artists.proofprofile.net/proofs/artist/fd626d39-9fb9-4b89-afc4-288bd6ac9722.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 0x0355b04cbdeba2eb8486619ad5509824abfa5083d8b91a9dc7cd0c5a7d7772e2. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHN62414274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b8b56ce9759458a9539a1932ebcf355448bc36f589b3bbe95e1fd33b2947d5. 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/QZTAT2331990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4dd61288d3b247f6c93558bd979414d6754c34c6f29d77a15a797a319c2085. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:35:28Z), 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/QZTAT2331991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa673f37b9f804eb200a7e6efeb3957e3a10e5ef0c5948d541de0792e1ba3d38c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:16:09Z), 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/QZTAT2331992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062b02394d95fec359de1c1411c7746fcbd3046543f1528a9d0e6c210f015eac. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZWFK2337791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4f6d5982795604e22164f8f5b973b61008d8f0044b83900b8723e5469debf1. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZWFK2337792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b504c8952c753f8dceec104ff26c0eac2e6455dbf59cf3dd3817dbb499822fd. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZWFK2337793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5677a5b26ed4c6e74542e8552f35d0641bba818a953065301be95a30342b6d. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZWFK2337794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c3cc360d406483d6d5ae6f9807be905731256482906809ea4eb2de5a67e8f3. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZWFK2337795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da79e136b05dfd4fac6767b5195ef37981dc5971fbafb54e5d480c9a237d4a9. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZWFK2337796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42d7ba67423285d59d3325351db2f471853b8f5b4b75c5f6ba2feb3f0180dc1. 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/QZWFK2337797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59545aab29434f9800d30d02f391aaf848dfb0aeed2a86b5ace10f4679c9233. 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/QZWFP2406845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ec5bcf8aa48868c4ec346601c7a8b68b763da3e099a9385372098ce487c3e0. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZWFP2406846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111b1208c8346bb8677489b151f415a7b76e3f59e0c363f36793b725ac8dc433. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZWFP2406850.