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 0x946d14f42c0fcde87c0fd881807349b586132d232240e27fa53fac1f512f8ee0. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df8747cb-91d5-4e72-a229-381f92b6ecc0.json and https://artists.proofprofile.net/proofs/artist/df8747cb-91d5-4e72-a229-381f92b6ecc0.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 0xe66dd74614900d3e68fb2d1639f3cb751497ab07f72146bba51ec975d7f64953. 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/ES09S1800479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa245fa66e018b89571009cf1a900ded8330e179ed714095e9f8e776b5167d0f3. 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/ESA011706522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c70146808881b47aef18a15729fe554697994ab7e26934b9f080d51801a4ee2. 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/ESA011706523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07c0acba0193c6b312fd1c5776d2a4fde9dca6b92fc3015c7b846f7db36da66. 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/UKZYK2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021fc16e7f15279e843cdaa9fcf35ed8a942e83cd106557e97b3c1abe093622d. 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/UKZYK2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf053ecf5a6792fa6171e69178cc529890410b65a734533fe825618ebc51c503. 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/UKZYK2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb129c049f9379ecef6a13bee83beba07f6135cf8534e70758299fab18be7b38e. 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/UKZYK2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa695aec8bda271d28b20dd8f9e73fa0856f6a0d89748c2d14e841638207fc1ac. 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/UKZYK2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bf22a5c529408e6a423435fb6b3233e395ec6a4d87f70bc753f43e145d68ba. 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/UKZYK2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb335f056a0393020232b49be2eb5f04719460752bba27bb79faab034bce563. 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/UKZYK2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185de862bdf4942aa98783b56929c928e3782adb7aacc03b8f332d2cc3299ea7. 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/UKZYK2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2c63a739c287f91eecc936718c62225e7f506c02b0aaccd286fe1d3743debc. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/UKZYK2400029.
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 0xe1d013f354b04acd18afe0b38e85be9b83c91c976a54ed15800caa441567d707. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/UKZYK2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce2b5c57b496ab3311ac6c4c05fbb2dc3c56cab532dd47b21e863126e11a677. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/UKZYK2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83f74e01258d6798a35ce37a5c4be55243b77922d279f4586723a8e81db31aa. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKZYK2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57090833f11b5437ca31489ec449726ac7874d0c2665bc8d3a183f178d98afb1. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/UKZYK2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d288f0b65786ba71f9c88832e93795961abd34224b2bf0f3529b20e7432b6e7. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/UKZYK2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5309a7bdb0d4e2d7c5837f15b6aa176ac82de092bc4b4c128d1d5554d4f4bffc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UKZYK2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bf45de958aee983ed9b7e9d3d55cfcc1b489731f0f21b1aacc05da8df9e8bb. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/UKZYK2400051.