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 0x51ec67fdeebf5dd0bdc917fd744246f90d947c6c958438bdebc3beb60deb4bd1. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49470f92-cd1f-4d88-a260-19efa04ef7c2.json and https://artists.proofprofile.net/proofs/artist/49470f92-cd1f-4d88-a260-19efa04ef7c2.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 0x0cd0060a6dad5981149e7fb69e5cd2b6ec84448432931fe3c1bf030c5950e34b. 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/BCTQ42200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2255cab61095ff5205334c779ebeb45622c932b125599889c68fffd6b19d4f62. 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/BX2C92400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bb3c13c75349dc1024b574612b2cdcd6e26a2a47459be5d722595e6b38819c. 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/BX2C92400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ee1f917fdb99bd9c3614c0bcf270d2488ad15d5a436f658487ab9369030a2c. 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/BX2C92400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c3db21c07c35ee09b904fde521dac739cdd9691afa119d10126c494ea4ab65. 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/BX2C92400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493d9ee6e60261a087ac2a9b9acd8546a3fc1e4931a99a2e40e336311df1682a. 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/BX2C92400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e26ec9954036d021a4ee77c6070521557638981ff1b8f0fd29942075952f084. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BX2C92400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0e5dee368682a2c708bb896f88e2fa7dea3e802a5fa35852f2b6a3e0ee9c81. 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/BX2C92400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e21263c8c165d4fadd9f39d36c82881948b83df95d1278a36cea603aa749b6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BX2C92400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4993f043e8629ecb69e32658162b95a49ccbab1bd6a1723e5994fba1b6e32332. 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/BX2C92400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbd968aa754ecd5b043bcf81dc33409daf45a3ef8e1953ed89c597ffa9776b5. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/BX2C92400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac79eecf296a44b13a7f7fb66f4a1d14ba4e785c3ef5ef75c122206efd7f4312. 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/BX2C92400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450847ac6e54a5b8a9c0fb6bf84caf5acfbca09b55b24c16c733ccd04aa3c1de. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BX2C92400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0e5dee368682a2c708bb896f88e2fa7dea3e802a5fa35852f2b6a3e0ee9c81. 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/BX2C92400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2255cab61095ff5205334c779ebeb45622c932b125599889c68fffd6b19d4f62. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/BX2C92400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21bf1a838782f3d94e69113f362fbdaf409c67eb7346223a30a2c8df559dc05. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRTRB2075126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4850abc78327348a1d9ab13481ad85a6ace5a7d60f993b9dc6f6683a291c9564. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BKLIQ2300003.