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 0x3b56ace44404c8a4e92ac2c178d3fc43a02079fb60576872af53ce909780294c. 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/41d1c218-2490-4e71-9c02-0ab0f0578201.json and https://artists.proofprofile.net/proofs/artist/41d1c218-2490-4e71-9c02-0ab0f0578201.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 0xcc03a8d8709cc3697c4a02ad02f93874bf9a6d8b08999846fb5c51f97ebe1ba1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFJ2342572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adbeada0b7c95c4f9a2d36d80dec40bbac71a9561bb8ec31502019da591c58f. 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/QZES52471253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589b404685c0c825993f954add70b752de59a982592b9c6d806aca02c4572058. 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/QZES52471254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ab00cb08406367ac1d15e835463d30b067e93ac6003d8b45714a84c8e060e4. 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/QZES52471255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160eb2f16b07f883b123d054b6ccdef967993e0a98b497cf4225a5b4a977b940. 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/QZES52471257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe525a6bf1959a840ff7abea9ff1dd8ad5bb1feaecef6f96b843159ed41f08f9f. 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/QZFYZ2412431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5856461009303fa168cde67c9fbb09edf866af93e6b0b9ddf2dbc3c8769e0557. 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/QZES52471258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105853931827d0d15341e119f76831de8a1a424890b11e5cf9d1cc3ddc1faf56. 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/QZES52471259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4036702936834e171322c0d883611f03257594881f30698d027c66d9d85b30b2. 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/QZES52471260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059620371b2ab81a91b5f5571a73b9bb82178ff716e24249af5fb85b75a8a489. 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/QZES52471262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1277cff834d7929deb77e89e5a807ad78d332dc1a9b6609ea965960bbeb73e. 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/QZES52471263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111f2588774b45a81b7b27c84a212e15a346bef495bb5074912e5de39bee40f2. 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/QZTAY2347599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe408c13f0c47c755491d45ab7f9a18dd7137f8a3b3e36ff27fbfa4cc2db4a251. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWX2318100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e98e9fabb83756db089d9e9705b03f89b0c11d7d5e44a7762cefb7e0167259. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFYY2331557.