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 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 0x449c081a29c5ae6e5757746a8749fa5bfc9549f40bc9c02e97e57c6a6300bf4a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69f95b09-58b1-44da-8d86-9066ccf81b84.json and https://artists.proofprofile.net/proofs/artist/69f95b09-58b1-44da-8d86-9066ccf81b84.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 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 0x78e458bf27b713fc27e216c931a9d163b1c890106ff6f28807525053854b31dd. 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/TCADY1851456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53f4d4021af92a674bdd9524280b4faa0243dc864e0df07ef03e21db90e37ce. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAEB1957753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800d7bc76640d85fb65427be91dc73f5e6fab3d81eedd3a3fec7be86ea32697b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAEL1930300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bac8bf2a1af49854a510806dd068bb33a57813ea9f8d162ea9cbd7ee0fbb934. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/FR8FB2000730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4629d7d0f43753630c8ab11046f3af249b61902f3c09e4282b44df66ad68b8b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRX852101660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730a182bafc13d49c20d05901c6e6df69bf95b8efe4ae8eb59581130f1155fff. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FRX852101840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91abb1c320ff6e433ec017d5add28e98e7b548a817a0a11955a9bba2833bcc3c. 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/FRX852102110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520a6b2d26034bfa9d614b2415be16a8a4b5b9d2bca143fd1f6b8d0c87b38a52. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRX852204260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd513f3a75e49e40d1e80814291c070f7b6b0b60c0c005e5c074813c76e5976e9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX852205250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8ee9996aa3a4004efbd315bff2cf685985c372634b670e177a57790cf41758. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FRX852205320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943497687cb56367aa7c08055877923060d9d375b61a9466ff9e7cb8a15aa84d. 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/FRX852205340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd540650d44493606778290d8d33b424f4f7223d8c27a6da1822881e82b0d5637. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/FRX852205350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d20e6b1aa109dbccea3f2f694683d0d44a6d02b2b89ecc8c846ae44820d4535. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6F2308804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d6452a7674761fd738137e8ae6ba1a3bdbc867de59e2433a12302448915af1. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZNWV2376512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b60e08e276c8c7fafa4592b100c124bc03ae041dfe2c8b7ca53ebb17ae553c. Chain 2 (Bitcoin): anchored in block 957959 (2026-07-14T05:54:20Z), 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/QZTAW2371330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5458471d3ec7ce7f84dd849ee3cd0566bccb73d085ce52651da380b63653c8cf. 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/QZDA62421963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0dbc39c27d74c8690d34bd08662251a4b456e07f599d304652f496e3c70e4d. 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/QZZ782470968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9820cc79cb1f1fd3366275ebf00e0833926f210c53a3ed8d6ffff812c05feff8. 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/FR9W12428324.