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 0xc404fbfe293868d79694bc4f1bbaeac53a672a7d0a0769bc147a9b231e6a9348. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e454e8f-2b97-4557-a45c-359b5cc3f005.json and https://artists.proofprofile.net/proofs/artist/5e454e8f-2b97-4557-a45c-359b5cc3f005.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 0x0ca574e85ec860bfe09be5fc50429cbed2e053d7d6ea42324b957d6be5314cdb. 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/BCKZH2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7906e5e02bf28f40c7490fe9eccbd2dacbbe9681b796eb4304fa0b13a5aa555. 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/BCKZH2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4656bfbeab6c3399e1eae63404d0a32dd246fda779ef4d779eb22e6117fcae1. 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/BCKZH2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd71ecf11d24d04dafc704836fd3907eb611c8794574730421d079efbe933ff. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BCKZH2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bb0dbea2d8c3e4c40b235c14a29b9921f31e271c056035eb7dfa5175076fce. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/BCKZH2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663a1a59949c200e49d833c50e0f9f230a53dc4334f059a62c5c704854468725. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/BCKZH2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497634532146e58fb3d2f9a64a8c84bdb2f90a1bd75be8e73ef916cd96257e47. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/BCKZH2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd4204b2024ae417fa85f87666d0ee3e1f28bf47384b271189741700ccfa746. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/BCKZH2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8ece6c22534751b4f6c907b42cee35e5dbf69075a91e5c415feaea61641914. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BCKZH2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a1a4094f38c5cb4da47aad5e59d48ad17d216ae1f0428405b86f86d165ef7c. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/BRI3D1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07a567fe95538beadbffd014e945926d240325525cc87dab7a4a66e4f4dfc3c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRI3D1600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeeb75f8a3fbe85a85f5d290e74f610637cf6b91fb87e247bbbf14f5e30d530b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRI3D1600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a53c0759d6e4a0e8b7d5299b2391f1a2d992eebac1e2a4c223c90d772f58e03. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BRI3D1600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510426f072ee3923217fb580557db11536f45dd7c5b0d0650da0cdd05b14f7ac. 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/BRI3D1600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e61402b1f7ddb048f1cbcf159765896b47d8232fcc004cdfee3e9165d20057. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRI3D1600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2556b838f7616a7d0c0d5006b5c8be066de48ccc938b4d6506912e57d998e7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BRI3D1600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985b152928decb08e1f7977509d1d67343730c70f019cc66241ca605932ce863. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRI3D1600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0481d17d28a17fcedb1659f9182b9a4d8ee99e93d1d817a8d6115e2f30f2be04. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRI3D1600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853b79d5d2b14e8805bd74cd6293fb2cbd30efd3a32323535a1608d5478d4802. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRI3D1300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd451891294503024116002c72413770361595512ec70bf429d235b930b6ade5b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRI3D1300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d1c70b156fa2a5064aff3528591f705e530d446115d07fef8f3542a3cb9560. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BRI3D1300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b227aba4516256e6bd11b69e583ebb90e98a01412ad4106cf200a4bd8b30a53. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/BRI3D1300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689d2a64540298071c8dff4669b1fc25cdc8c15433eec37eb84bb70ad305b474. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BRI3D1300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb298cf420a366d4095a997b6a3ea420329cf569fb36de3fd8cbe59689ea1630. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRI3D1300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01c5f4df9ffa92f322905e64ce53a9de3b044abfbd4997385762f140a38e3ad. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRI3D1300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a1bd92102a3f527c83c149e19e0fb109a32565b92740ffcd3c685916670211. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRI3D1300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a2ac5f8aefe8b5bfe2dc9e6d37e4a3340551f8bbc9f73964ff9deef1204b79. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRI3D1300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3d0a55bc6bf1983e69deb95f3d5aec19fe0a7a764526ae8433e322ffb7f52a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHZ42139865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a00811c4be291d558f59f7f54a68b21ecba83d26bd0c09877bbaed186b0675. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHZ42139866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8b0aafdefd3bcf51b3909debee3fd451035272b87514b202f1235fbc144d8a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHZ42139871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc723cbd275e8fe04cf0f91d796fa2b18688b80fb0af42d67288cafd0db7ed850. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USCGJ1921944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998c6cc8f28127028fc72fcf09e38dfa073bb022b09c07b005b11a35fc6bad09. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGJ1921945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ec94d185fd9fd98e442d42f3abc9a3275cca0306b976ac91553c2e50a453aa. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USCGJ1921947.