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 0xc4058171cdcc7fe226eba20dcb0cd670709f87317d615c5c5fa0444d4799a33e. 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/5d51a655-2bb9-440d-a44d-3ad43a087664.json and https://artists.proofprofile.net/proofs/artist/5d51a655-2bb9-440d-a44d-3ad43a087664.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 0x92807a0300f289ed85110fa6c2b29d02bca4eb3c74609f43beebbbcccb942940. 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/HKG731633788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542afa3ab3ea2b4f7435a41b0ad30a51b568d88abb73fb026153dccb9299182e. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/HKG731633789.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206a699043579b6fee0cf3452c3ae8c0b465e09539df0d559a640679eafd00bf. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HKG732499074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3bb5c7dcd98c1a73b97fd6539d5d8a441e92dba3b709db5268b503f68f4b02. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:25:04Z), 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/HKG732499073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe628258ddfc7a84e5775bf48b9fa21ed3be8576e94a0626c237bcf06a146a283. 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/HKG731672592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ac5662ecb4143aec60a5ed2c406edfbd6fee28d1acabb38875e46f46e94928. 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/HKG731672593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca51fa4695ea808f4621f1737c0e22131077d4632b3a65789fb991456a7da1d4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG731672594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f717d42963274e240f9fb6a7c720eee61d3879f67ae4d83315f4b1b28e9d36f. 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/HKG731672595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ef6f246ffba67658ed5863922ce1902676c7140c37feee6c30b0136916ab75. 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/HKG731672596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e61757f0239199248b4ca3bc8808f9232d1280f7b3ba6953e329eb60c715de. 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/HKG731672597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc109ed950e088bf12b8fab3429c07ce6211ef28afd43087b2d17a0677e2fbacd. 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/HKG731672598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498ee62fe5052690c9e22b9be239b834d6949c5e802dbbe13580ea405b1ab57e. 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/HKG732410191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b395994a72bdb8fe9a2c8702da5494eaa6254883550b70e55eb14ccbb9f46a. 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/CNZ632301049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775a4be6067754494959d1d9074db639ef09231ce0cd01d61fd6e47bfaa6b773. 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/CNZ632301051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2164ff0ed1e78806f9d945eaea4e25110ecb3d749d174edd8d291c978b967139. 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/CNZ632300735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa499d494bd29b23e15ec675b7d41264a2034687423dd2996346a3a8fc90e7f06. 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/CNZ632300743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e916a38c083b3677f8d4f847f8c76a1079ee597cc77ec835f670c7820b6727b. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/CNZ632300734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ee2fef41fd434a07954c598f68fa0e738d3eb59cf45d15b5b4e803875ce22f. 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/HKG732536898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc397f26084f0393c221f757a2d05d5328508035e0f8d99598762ace923b5b30a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/HKG732536899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b39bd0164f0fb2323ef1da9c7e837889b7ddb72f1af1ed561559cb8c52a67e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG732341647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f47d70f68e29fd8d7b363c9d836c8ec9fc3d52f6cdc57af6a1885b0c358424. 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/HKG732341639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108769aa78279155bc6e64501b9901f7b370e3af400c105f45d5391a336d910c. 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/HKG732312474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa67f57827e40f37da15d2696b6d8176185c48607f0a0712d226324767831b8. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/HKG732312475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba73900ce3856a5082f2bce83e3a9f73458c02ffb1b57e9523cc9a90e9b59c32. 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/HKG732313816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bc103d47c340a9a16103de12c2d7fa5caf6676446147bcdccee86fd30f0255. 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/HKG732313817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8df316b43dc9231c165b567e8968b9dcd0d77102a700fbee840842d41be655f. 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/HKG732314782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790f0b87fb547560238097451b6744eb68709930f668c2d9fcfe0f4135e52379. 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/HKD012303850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f1e33214b862f13659e21549d52c00e5d5051d73cf5223886de3028381e67f. 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/HKG732407065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0265ec37dd1a9cb4c908d13ef9b45c5eb61e8997e2d941ae63a0ea971713a62. 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/HKG732407081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0d14fa20437e0fc56c1add68b38ecc5f45b7dc2ea0a61d9ce8eb8c5163397c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKG732406724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac008a547c85a34cb6b2e32c95ee6681d84846902211b7b1f427933ed72767a. 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/HKG732407071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb0828a91d0747c167d0b59665ce03cab67637a9e17cddfa286c9daa8b91aa5. 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/HKG731402026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0750efa2a4637fdfc2899ae3af430155e491556907f1379aabe2d8abff0c0a. 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/HKG732407087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a483f291c09e275cfe81443b44253e92aa62125c574bc14f15a61eab495bc9. 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/HKG732407066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918f2fa2f85c98bffa337039ac32abe5e0b8ae0bc3cdd657effb8ace95dd0c8d. 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/HKG732269053.