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 0x6372291312544bb971fb7ff85da92bce5788054609ce9d1dc568258ce03c30a2. 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/2abcc857-14d1-49dc-aa6d-5300921e2a5d.json and https://artists.proofprofile.net/proofs/artist/2abcc857-14d1-49dc-aa6d-5300921e2a5d.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 0x3a60fe0b0d121f0a66d3133037887466f7b1e03375c58ee9ff102fd3b1075371. 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/QZHN32397539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d00ae903defd4e7ae87990dcb47f644d689420066c57481cdd3b33fac4b330. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHN42300226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebaa7a6de0de1833e422ee25b68b3870ab3c6daa2b4438bc769425412e4a963. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZHN52304679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c18cc3724185bdae3d427046b0875be9b72d13f7bd7ddb0cde9bde3afcef48. 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/QZHN82381368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40edf34cce215f7ba6f90bcfecc249dfea0efaf183c2cb1be172fb007f13f6f5. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZHNA2360561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae778eb98ddc0592d35975ebfeeccc524fdd773b98dab523ae49610580f3bd9. 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/QZHNC2333635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43f87c8644b60a7e92851cccdd1511cb6aaf2be2b49a46ab0d6a3f6d9e25044. 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/QZK6N2365422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807e4650b84a82a49d23a99b7bbbdc01544ce0df786540967aeffa4d2f42df42. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZK6M2399366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb710e9c6a3c2b64710c81edee44b7a510fbb9e10f079c597fffb7dc015095736. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZK6J2313683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf562aa0204453eeb8b7244d2651758be1cdbdef602a04f4161b7470c2c8680e3. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZK6H2320696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3bacbe1d9924dcc5de128022acdac7c273b1088fa2c85c5a038707e2311cc5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZK6F2305821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2c736d2ea069a0b5005f10a7a1fa9ac2d021f336812c4016c2b3a7ab7f1d8d. 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/QZK6F2330526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9c9ab6f46ac6f54c1b94d096f4a631e294b95830b1c31b0e6b1be067842c95. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZMEN2313963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f7d85f3c2c2f459e82e3641b2108c7de22be261526b954d616436de4bc781b. 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/QZTAT2315171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64f6b6d28e2a3a630a596106c1b6f160db85f81da232684e847152603363063. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMEQ2312658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9021cc9c0050af1645b0636e95fe5261c4207db42a3d0664b06cc88b2945279. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN72488508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7845918635a61561af36a366f9d1745e2ec577f2fa104f728805920636cd351. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZMER2434949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b4e31883e9a808965ef37e652368dd0f89c3993dabe68501c652bff631c0e5. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZNWQ2421969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28c44fa9e830ae30f8ce3e78ecef941805f432264b70b9bd2161440fe31787e. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZNWS2409372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83809726243d8efdc931806e24d4ef43284077f76e54639c0629d932268fba1. 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/QZNWZ2455092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03616046e4d171e453c45192a4a4955608b27e1b25752043cc78fbd0231ddd7. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZTAT2415287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3914f8348b299a80bb56441cce2f48d176a175aa73827d1b47226b832bf178f. 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/QZTBD2400689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e01a7956e982814d062e7e4658fca951a1521936fb7418816efb85ba9793f6. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZTBD2400690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a1484fee2792f841523d97985a882d53f9c1e57a8ad103f1822ead73a4d916. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZTBD2400693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b74a707e735675eac136d19df5a262762e5ba98a72760d8b0aa2295b521eff. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZWFT2436991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd3947f8057a2811e2c209ef691ce8622a9858939579f5660095f9e080af8f2. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZWFT2436992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9052a7d530a270255a7bdde963efe0981b0d3052363c6231fee85e84c35741ca. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZWFT2436993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbddca66d72051a4319b33a6c5b48d999230def27c291050a826ee648aaeb102. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZZ7P2451400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e9b84207c6c75e9c9a9b66b47b3e464528f07bc089dfe0f5ddc0577994e0c5. 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/QZZ7S2406753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474e7399d48bcc9d2a5cbee578eb730dbde52cc78c780ca9de874c92f23c7015. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ42560325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ec6602d668dd01624ff1a6d8e0e8a1359bc302168274e5fec3fdbf9bd9ab57. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFG2534728.