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 0xfc4fddc2c11048b845c01ca144fbc63c04a8ce21bb42b3b861c01e7918b88f67. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fe4d9d9-9ea6-4abf-bd22-a58735058591.json and https://artists.proofprofile.net/proofs/artist/7fe4d9d9-9ea6-4abf-bd22-a58735058591.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 0xb52af6223e481650740c2abd1e64f6cf061d1239217548ae9140ab52a4467e00. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ATI211406703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9928541b696ec1a709696973510aaebe33b8a99ba742550bc1a83ee8f6383ad4. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/ATI211406706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0029c562776aab059e5d316fe1ff37d683d5989be12b214f3be10e0c30a1a6. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:07:14Z), 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/ATI211406707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e910409b941ae95c29669fb89e14160c4e07d38a426efa84c0633ace941bb1. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/ATI211407501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3ba3bc86b821ba0ad820853cf25cc8192f7e1d3f6c6fa652206a4967f8639d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:36:48Z), 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/ATME11504003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323b32cba8f97a5ec961422e3b870ff07333fe6388d97c661a2b333d936d9506. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DELJ81757366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a5610acfefd2c0550c977d8ef8168e40188530b09e8b9f8dc7ecdae65ed075. 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/DELJ81947177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0163a3d93b50657a85106872db35d7c9f1322791398ebc3aa9d1c1d587910ad. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/DEZC62190290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bd5e3ae0ebb7bd8b270379eeaad30500cf30675c84cf0637f405461245c4cd. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/DEZC62131910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f5c8a4e348554306e0500dcc78dc0f7587a3577225e04ab088249659f57982. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ7X2425210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087763206e7876905ab003df9fc22f0089cce8af625c7d6a165e746a948ea29f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN62549682.