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 0x5408978b248c0fd731f88cf30bd49ade2ca5627c48e7a01cf54ff59739d687cc. 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/fc8e3dbb-ae43-4363-9c49-142fc6005112.json and https://artists.proofprofile.net/proofs/artist/fc8e3dbb-ae43-4363-9c49-142fc6005112.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 0xf394d5d8ba61c2e49ca795c00c9501cd037d8a09a08daec0985d33a4e05d8923. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEYC42000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d9f41d42dfd4e84df1ec1a4b39cc00e9089737058ff7cecfdc5d0d446149fc. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:03:56Z), 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/DEYC42100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97de380c0baa0ca4881850d24ad743379460f92da078cfa60f5002f8bdf2ac3. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DEYC42100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d4666cd83896fdeb03e2925a6b50df9f30bbfa2e780bdf49a699716fab10dc. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:36:33Z), 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/DEYC42100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5098a8b388b81c074c9603d87f42481f2d130546ac8f5c97d17b580dd970f9e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEYC42100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46410d08e15b0efbfe255bfbb0ff4a8aef34f9b0f875deef7fdc717d1ce54a7. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEYC42200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdfe26a44211c20ec4de85ead733f34b2635980e084e96beef48bc07a5a9119. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEYC42200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8d0ce68f878a06712fc1ad5a79f660b32793b60466080878cd216e759d5948. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEYC42300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee5872a83e7f9d11daf2d87f352de45efa3c0f32db7aac3d2dff9cfaf393012. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEYC42300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b59df2a421d3c44034669e2c3b59c249b7be2b7f85ce9d2a2005b46b5028c54. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEYC42300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fd0f10e42914b8e2b57788c685c31c701e59a702e6213a68e1a3ed2980f760. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DEYC42300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155b8948f3627d2329ef1c29eb0976e466077fc8888d2e3fab149d1bb0bf24bf. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:27:31Z), 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/DEYC42300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c3fa1cc07b63a7f73697bf393e3f8c1f3d48c87d78fec2e467a2c35ce2c38f. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/DEYC42300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8436054fc36db9c79a47e487c033fc38a554842de37135fc8e7b753f8ab0c8a4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEYC42400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc23ee06d0450ac9f953ef95f224c8b08578202b82c14caf3c4cb5e6d2e3778. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/DEYC42400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8436054fc36db9c79a47e487c033fc38a554842de37135fc8e7b753f8ab0c8a4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DEYC42400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4e6cabb48e46aebffe61f0c66726b6e66b25438628763380077c45ab0561be. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:06:35Z), 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/DEYC42500004.