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 0xc610b6d96efcc87f8ce99aba23fb0a60c9a8a703ed71c1666317acbbe9990866. 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/3d7a8350-2478-4e30-96be-aa52db8ebb5a.json and https://artists.proofprofile.net/proofs/artist/3d7a8350-2478-4e30-96be-aa52db8ebb5a.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 0x6e87c5f695717c003c9cde7e40cea6a473c18538a45bf96a7d9a799d03f1522a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:40:05Z), 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/TCJPN2030763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0fa94f8068f8a3e82cfbb114e7b1e38707c8fb0e5ee6b749b3fdbc28a5eae8. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCJPN2030783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0fa94f8068f8a3e82cfbb114e7b1e38707c8fb0e5ee6b749b3fdbc28a5eae8. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCJPN2030783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50236c7be59b2a7c7321559d6020c5d90c3454bf86654b56cf28e621aec50c6. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCJPQ2279190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12c53dc0e925b179ebb8f28afee0d020699f6d629043fc27e675afa142f999e. 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/TCJPQ2279196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85205663a292c85813da277e67c269c9930ad082254308b39a619ad30d4ffa6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCJPS2266112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd45e2fa9e12d983651bd748ed925c15a6cb0391641c18021e8d5377d7a1dcfa. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCJPU2231125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd45e2fa9e12d983651bd748ed925c15a6cb0391641c18021e8d5377d7a1dcfa. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/TCJPU2231125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c43620b3b642870c5ad92014a88e5a8cbdebd68f6c9d4e910fbd1b502fe428f. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TCJPV2388698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c04ceb041a0a69c0f2d285a81c6824592b29579aece6e6f7b7187e8612ca85c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:23:28Z), 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/TCJPW2316331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca84aee5c6123548e61177bae06598de3dfa7c6212f202103ff41a5b4ef7784. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:54:29Z), 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/TCJPW2334625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2e844b984f214b64621c4241941f343663174d7b0ac3459280edab3db0effb. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCJPX2384890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2e844b984f214b64621c4241941f343663174d7b0ac3459280edab3db0effb. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPX2384890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247b5f527da51eac54ef25f81e80fe9f06bc080526fb3a732380cc83adb767e8. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/TCJPX2384891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187b9e177483bc81800043c283716a836e382a2ce5bc5d11839a0497c1d8a337. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCJPY2487501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527e2545e82936172448e9a2b4027dcd7dd90c200897d970791aa72bbd56efcf. 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/TCJPY2487498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8092e8e900459f2598f39c44385cc5b34f536cde8883ca84c31fe823ea0c3d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:02:15Z), 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/TCJPA2437935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88296ab3e01703b2142339cbdfa1558d66fbad64632d45d9ba593e2d81154a22. 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/TCJPA2437079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700f0421ef6dcc42fe54f1607ceb3b03f52997c66a994d92a29b6f278e52c353. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCJPA2437953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da035ad91eb992b52a9337b4a49c2dd085d17ef30326266c202936534aafebf. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCJPC2400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c618a35ed1086ea3bf003a3141d1326f6e76679eeebbb53c0b1e68ab54a57b4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPC2444287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf241476467316442aa5303415941c35c47ac744cd04d975d92b78832128f6c6. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCJPC2467889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf241476467316442aa5303415941c35c47ac744cd04d975d92b78832128f6c6. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCJPC2467889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4856935652d8323584694ccf6ef10af0d6375b9d168c0ed3f018942ade69eac. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPD2428791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4856935652d8323584694ccf6ef10af0d6375b9d168c0ed3f018942ade69eac. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPD2428791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508d4ab15a6d7b1d93ac39e105dc4d498836831a51e013ff7f4ff7120e760ce3. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:12:28Z), 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/TCJPF2566094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508d4ab15a6d7b1d93ac39e105dc4d498836831a51e013ff7f4ff7120e760ce3. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:05:52Z), 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/TCJPF2566094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a91eac544ff097d18a58911cea78a425f0666ff7b4554fc1080544bd665839. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCJPF2566097.