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 0x6e84b5be9856dbda5df843ad2d360f02a42970c4c2e02e24e533074dea297cc2. 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/df9ee9e6-4459-4411-b06c-d5d887eaed2f.json and https://artists.proofprofile.net/proofs/artist/df9ee9e6-4459-4411-b06c-d5d887eaed2f.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 0x82931c9968242920ffddc98f5772a47037d02e7b9599f69ed8a59376e73d38e0. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:55:03Z), 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/ARR6V2100234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76b1cc516434668cf3e93d4d9cf0f6d58a4fe6387eb60bb3eb054e778f9c0d9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/ARR6V2100328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2411c76d05fe9b33ae91a3e43830c5448b6d5f3234b40198a726dd046a14d7e1. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:09:20Z), 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/ARR6V2100329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac56d36981cb97e514eba203a478c77e9a54d4af8d36f1b439abbce84da0385. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ARR6V2100267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ec6687523508f2d99f3ac50894772f31ea6b6f8b85e6b58f8efadcb17a1958. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ARR6V2100331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edc19a62b0c7652b89a849ed9f079ccc80c0ef966955cdd9a056dc805fa5a93. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/ARR6V2100332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614f7a7dbb3743445af3908a1e64df2085848d612cad984e8907790f1861464c. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ARR6V2400305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68ba2de4c820a32ca4b5152389676f1e4bc288cdc8ed4b3a1e599b05bca5fb0. 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/ARR6V2400292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4561fe973f88abee3c80837354dff786169968f1796e61712dba24f846a32c3. 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/ARR6V2400307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906d2270329e7505790f5235fcf00584f7d69a5ff0f2ec68dc4cb27cc2825561. 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/ARR6V2400308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984c7670ce84c87b2c7faac362ba5ffd49af86dd68186a9ea4146c586c478422. 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/ARR6V2400310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cfcd5e85b5c4bbb7b675ab3065c059f721d4ed868a92a8d454e858f2c0e750. 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/ARR6V2400311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614f7a7dbb3743445af3908a1e64df2085848d612cad984e8907790f1861464c. 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/ARR6V2400305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db56fd923eb93d14094e7fc84296f866f2037f8397f201a8ff9aa1b819d3187. 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/ARR6V2400312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3319e48c6c8cb091629629fcc3657b80d367b066705758899e6800d3f79cbf. 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/ARR6V2400313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af6089dcaee3a6242243ce861d2766af705fc8834cee089dca8afc28671e68b. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/ARR6V2400309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52256756fda42960ea1ec2e44715db4a1abd1a222ff6858aa3995953654b211f. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:47:24Z), 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/ARR6V2400314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898dab941097a73f797db977b74db3879211c40bdba8a3d11237287447c23b96. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ARR6V2500142.