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 0xf586f1ffb0a4ee49ad8863decbeadef9cb40d51f55ac89ffc45e9a6d98c85810. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed7247e1-1fa0-49b8-bf89-dacdf1e7b571.json and https://artists.proofprofile.net/proofs/artist/ed7247e1-1fa0-49b8-bf89-dacdf1e7b571.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 0xbda9a981610c48ca8897cb048a5ed53fca74eed2a969eb6f771ead95e039a98e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ32569504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6c29de10a5327d23b89a6baca9d4710521df7ea9093bea7f7c4687d50a2b1b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZFZ32569505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecd62e469bef1edd05822e7b63902dbaa51581ba79134f6ce7d4a3b25e903c1. 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/QZFZ32569506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d60b0840c580e1ba371d3eb586d8938562565934677f2b979af4811848f9f5d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFZ32569507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5480b9bda14965db49546aec36b90c536bf5172209d0235a4feba533914efe. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ32569508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc077af92f56484e2893e35e5a27c95f930b3be02373eca45e5c687c432b8e56. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ32569509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7190f3d4388a31fa9e2c81155034db874300756c3de09e9b8e466b41a21ab4c7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ32569510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d5496def72a435851d88459396421458332790ff64dda8727f7ac4bf52dc6f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFZ32569511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da573aa8086db71a6592536496f0d2baf4fdc7add2abe36c166dde5f0ef0d06. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GXD7V2557847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324d74e5ba513bd373a8c48fd56d76fe36ad40e068a28d8e3aaa7a6277e93096. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/SGW502513239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab11d27203ea6c47855af109cdf0546c920a3c38a3f5de5644c29917e91b05f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:44:48Z), 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/AEA3A2536339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533631d48ab70fd2c82c09a034bf0b522284647d56ea5014611912159f684852. 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/GXBAV2117749.