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 0x37e8a0ba4ce3eb41d7f25ef216ffcb50da042df3ee00b0d74700b159b89d705a. 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/52f96e28-6b05-43ba-aeb6-84fa31727473.json and https://artists.proofprofile.net/proofs/artist/52f96e28-6b05-43ba-aeb6-84fa31727473.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 0xc4fcb293434a5675b561a31f58ee3c31025652ef3ef64b9d539cc13556bd00d8. 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/AUGBT2325836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574519dac0a1b50946be3c378171134cdac25cc708ffa4e4d764c6185d5ce43e. 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/AUGBT2325839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3225e729d1dad57f5c76bc8a712c5fde48ae58a5a54de3f8c7079b84bf46286d. 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/AUGBT2325846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee9cb128911d89b016ea6d674cbc6daf7fa408c345a3d5cca7b775a6ba8e200. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/AUGBT2325873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a74133d92f45dbd3eb8a7ae8eccb1f38e1e12ae4f1078ba689edb6c1f94f23d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/AUGBT2326007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73090ec5b5cca6549c7cc96c8f12a61504a9e823956f5d95257348afa2725470. 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/AUGBT2344213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22520209f5433c325b734a8e7f543f8e2312e75e26076693f30f237ac25b51e9. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/AUGBT2355931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56be85b09d2b9728c549da7ebe65151d3d0af54103581d91a589dd2f75eb90fc. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFP2528569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa1901d915193ac5a5b31cf95959575a02b5d6ba414e6068e930597554e4b6e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/AUMEV2415454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f7421c91baf03b42231be8bf03a331bbddf0663149c31bd47cfd9eaf931d95. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/AUMEV2415457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90efd1e4f1ff5c02f1143d26c23d59c61466ef027237fb2a7fd0924d1e331cd8. 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/QZWFR2583042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f086f4c2ccaa417662de966499c2c8ad767034278fb2bcc892bb6fc34fc43a1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AUMEV2494626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b321f18c044cfa41807dc250216603844d604f256089932e9576f50b221a46. 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/AUMEV2495141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738ede746e0c4251761ce4c0c9fc3fd5853bf96edf81a112a00378404288a706. 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/AUGBT2467954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ac296859977d1d1486ac355c1b95dcba00cd69c4b39e3a58192b49c3c289c1. 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/QZWFQ2574489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e500132091d7e4b6b860685a2b54fa8812ad85a20c8a2fec048d2d24604916. 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/MXA3S2500276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b0b473983d67663ba1b39450cbf5c07b56edd1c275ee083e1cf2430a9181fa. 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/QZWFG2537614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785733624e0fd3b278ab332928d537cfe9552bb9d1645a1975cdc4b22947d1b4. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZWFG2537615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ec13475f5c7ad34b0c32603ebb178701fae3920494e531f2949995c5879459. 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/QZWFG2537616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5504877273331d9a6d9be5410ada9ffa0595e300114a006bab1f999568369c8. 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/QZWFG2537617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea99180b81c598e2bd5d3502baa0ecb1796fe461989636a95a1e71cab078c0f. 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/QZWFG2537618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca1e045ebe0415cf45f649404faed6682f57199b7e71e68e915e58407fa0f28. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZWFG2537619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfacc44a914e21f284491ed89be0c82ecfdccb42b99c7025c7f0c694a935e03. 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/QZWFG2537620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e3a36d9dbf6e9632a17d1a0b169e48d52e4f699824ebb94c773b6fb46489ca. 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/QZWFG2537621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7503fc458c49433c0d703988059ddb7f9477a093e4b2237da64ebd3b13c359. 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/QZWFG2537622.