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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7258423bc5ae57cda084e8f7c20f0ad0151d1aef016a5b3ac87633651748708. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0677e2c4-0558-4471-8835-852c53f7edf0.json and https://artists.proofprofile.net/proofs/artist/0677e2c4-0558-4471-8835-852c53f7edf0.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18223932f55d6c487f936a9ef5c7e657778236d9da189263e649a1ae2b863940. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZ5FN1772875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f28b2175738dd577a46bc243a81831811695543ceeb913fbf43256ddf773a1. 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/QZ5FN1772880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c34036433ee8d15424d04c368901e669151adbd2f5dfaabf13387c8854ce5ec. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZ5FN1772877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08eb24122fc8ac127c84e5fabd82338f65412cf43208300c0acc333fd37b58ef. 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/QZ5FN1772884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8f5c7e5e6b8f63167d96a93b9c9f9bd02e588e0ae662e9ffbf26f394e666b1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USLZJ1628254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32a71c27a9b555a1113e1e6e25456f947ea788a79f9bdb6476395d1c5678255. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USLZJ1628259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08f6117583cc9dadd556de3427b4e7dce47117257925a0aedb4910d4102b005. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USLZJ1628256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6694f7803c5569671dd397054297b43b04f9310be53609bcd3020fa6683bdad4. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USLZJ1628272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d91153c5bcaed5e50a261cf7a084263efb26cb5bed455f729c3ca6419be230. 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/USLZJ1628273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2193f2f27d17b5675a96946c093455116e2e9d6469cedd0f3972d29118a279cd. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BE1092200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7841b426f3bbff1e107080e7207c069ff7ac90b0cb5166a9d1a02a2781e77013. 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/BE1092200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb48e0ecf5f4617b3d3c31ff6710194a88ffc24937049d6b6e23c01bb178255. 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/BE1092200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332f30f57852529a4e3606eafb4a57f0319fc56d1602f886d527c666770ac673. 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/BE1092200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3486f81034eac7e00c1b5eb147a909a8c37a4b3b44f36f87aeb0d88aacce0d0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BE1092200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d19d88b03e60bf83eff328bf1617f0ea3d98e5bcc58634006c737aa41a987c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BE1092200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c10d4635c4bc821de5944fecf7b04786cfb066a5692e2039ba01c9df1f16cc2. 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/BE1092100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bff583e9336a5f7f3ba36bdf3edb824aecf9df0c81877d79d5139cc2236f4c. 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/BE1092100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d19cc02327cbe8ed1b1591cd549be67dfe75e1b08881fe2fec8c652aa4acc10. 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/BE1092100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bd563fe51ea6ba9e05596520352d079c145666dde633a6052b6363979b171f. 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/BE1092000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2777c477444eb5f102c00562c40bc6b6f5d51242cc98377b161a01e3c5ad314d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BE1092100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba423b8fcdeec5b7ac8c1d51041b450193a227677ee0d93fe2c511057ad7dc53. 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/BE1092000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b2350e943b71b717b543ce5999c4d3cc9ab8f2281d3aadaa9662b4f4589f8b. 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/BE1092000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3627bfa9e82bd30caf38701719064585efdd2b2196cada67ce98a7d2b7643cb3. 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/BE1092000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d3ea9d7e7710aad16ea2178702c5fb8f79cac812dbacc3c1c81716125e2229. 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/QZ5FN1958555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c1aafeccf0052a0c17a2249bc7b112b5b350a6622a13d04050f48cc43b042b. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZ5FN1958557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf1e62dec2644cfe9943b025fbdc2fb1e0978d7b4e77522b35e3cccee46d6a0. 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/QZ5FN1900840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6dd3be1eadab65736ca0cfd0b5a6f153a24d5caa580c562f3480e84e1db79d. 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/QZ5FN1900842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc314e5c8f95a4cdb4269933effc632b5f224a93723786467c1553c9911bd620. 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/QZ5FN1900841.