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 0x3e893d5f3a692fa389147898ade02ea240abe9f246749d8a96bfb935afc75921. 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/611a593c-7371-4a95-b60e-192210ad8e28.json and https://artists.proofprofile.net/proofs/artist/611a593c-7371-4a95-b60e-192210ad8e28.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 0x9b872ecd8bcd1569a08938602cee8dbbdfe77b9fc03df316fb86a25bc6c6af56. 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/AUAB02200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7722785c146bd40ad0c320a803f7924e6611419dddc2a2c667952f32607a4c. 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/AUAB02200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df767889f7e07c72efbe02910e4dbca5b5baa929abd7f0c2e3b54a5fc7827a6. 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/AUAB02200141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cb9be4a1c3c72321449a87ef77039e5f28f01f61f866a7cbba73d20f6aa0c1. 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/AUAB02200142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fc7c7481bd6337cbf5ec496229cdf5105a71c4e98feea7c149ff317cdac1ba. 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/AUAB02200143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b492fbe02f4a0d3b927ac3208b8a0be0172e6fb0e17b523d8906019580b747f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUAB02200144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903086c6dc92751292508b4d57dc9ebc737cc9e38df060a3282d8209a6b67e9d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/AUAB02200145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57292d0d0b1a1c67e9c5e8f8c0d5020c07b182b2340caa3e798e6e99466041af. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUAB02200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203ca5f88d2ab3227a6a0a80b459b5be5f307dfc67ff37b0472d6666e9d53ed7. 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/AUMEV2465744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f06a18bbd003f0dd542d8420d9b16d7ed3ced9b1ca9dfd0f1ebfe8fffaa7e3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/AUGBT2360717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f06a18bbd003f0dd542d8420d9b16d7ed3ced9b1ca9dfd0f1ebfe8fffaa7e3. 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/AUGBT2360717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c28de5b22edddcaf48d476ce444c1d447c1aac77887cdc1defd4c9962556cc9. 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/AUBEC2322695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a8a6ea49a05c983d418f811017befefd62f415d16193119a1454f3fb005d9e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/AUBEC2172108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71c139880a59676e42f2e7a7513e604b58a5a7b7bdae4b9ed9a6e2b4d73aea2. 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/AUBEC2111512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd9d36754a51bb42fb49f2efe79c4161837a505aa584522f56fc62d6ca1b52c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUBEC2146839.