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 0xffdbecefb3b98c97264f03676c4c5fb26bf6e4cb192b4695ed26c6964137b7f6. 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/b8683b95-dc5e-452d-9d30-d42f12a21f38.json and https://artists.proofprofile.net/proofs/artist/b8683b95-dc5e-452d-9d30-d42f12a21f38.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 0xfc3fabc8df319b82a3373e2aef119ffa66b647dc3d965b21c19b0c6ac02ccf9b. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-21T23:39:51Z), 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/QZ2J21507728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15a3d8baf70009cda225803e4437c4d2a704b910bee3a10adc4ad249d8d585f. 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/QZ2J21507729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96be8935a5006be9f6dc587dc9a1a9ed11cea378a813ffba38bd7a47287187b1. 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/QZ2J21507730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896feef0772413d5cf270a21ba35fd77661d95685e17b5bbfa0de51191f4978e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZ2J21507731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf44288097115894d573cd5d4a5655886221c4e6371878732656178ef8013411. 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/QZ2J21507732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b78f67bc714685fad64f652272ac1dd90eb01062b80dea1cf52c29261d68cc. 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/QZ2J21507733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b85de39cea89c46d5697d1cbd6d80fd454f6964550640efb4861341b5d84ded. 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/QZ2J21507505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9cbd8113483f3da52b49af43ef6db822a291d45a1b322d6cd2022876620211. 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/QZ2J21507734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abe77461892cb3d0743cefa44a3f01337f6f912a273453ef32207e51af82eb5. 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/QZ2J21507712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40506b075d6c4e189e36f8404f6b57143c5affe50bc19f59a01843e5de81b76. 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/QZ2J21507735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6830d0e82610aca037c22c149284a8a662d820ca97287540f61f0996dfa322f1. 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/QZ2J21507736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfd6e17eeb437283eb3f194fcf6ca3fd692e3db76d2e7db245d07a275a2af7c. 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/QZ2J21507737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abe77461892cb3d0743cefa44a3f01337f6f912a273453ef32207e51af82eb5. 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/QZ2J21507712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b85de39cea89c46d5697d1cbd6d80fd454f6964550640efb4861341b5d84ded. 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/QZ2J21507505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1d8c5ee224766aafcb531728aceb79e55034ce2ec98bb9ac8aa46f6413c3f6. 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/ARNFK2057864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fe5bc177d7ab7dbeda383866d208b869aebfb4ad1cb96f9494a8513044e1e6. 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/QZK6K2350305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575a3bccc0be1ba4ee03e304a43910560bc2d753bed833fd40acce9cb1cb688e. 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/QZW9L2370914.