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 0x7a0d9dbcc5467caf95800d207a42ebaddbda9b060658003cec65e00b65da636b. 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/31a2ec96-364d-472c-bb41-bfdda8b6824d.json and https://artists.proofprofile.net/proofs/artist/31a2ec96-364d-472c-bb41-bfdda8b6824d.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 0x486754768d75dbb1498510b81ab1699fd5b4f6c6ae1ae4e0bb2f3baa4adf4903. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SEYOK1764895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c67e174d11cb83977e42824bfb3298dd52a2103944dbd757361b023f6e4a9da. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SEYOK1764896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f29675625b7a6a73d25e9228bb79f586a567d92d4c79f1c993637e588e753f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEYOK1764897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259cddd077bf893867ec517e28d8e9ebe4abe8377cec4a7baad2f8a0304ee3d0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYOK1764898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42222fcf8a7a29715dacb9aa8c58463c76eab37eb3f026430b73d2d83f818b9e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYOK1764899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc18806a28ac78f40128aed1d377a414453d15e98005de076f8590c6b033fae. 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/SEYOK1764901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65697ae96b458fd9657c4d867510562c319a37c7a841c190ccc01905222ff55. 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/SEYOK1764902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8db5182259123dae64a44104d7425cf4bf08a1c64cefb21208a4478034552f. 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/SEYOK1764903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ba7b7058b25556636424700fd7653d413584bf7c34333712262e4d52793fac. 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/SEYOK1764904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987473a7619cd1c3038aa703243423bae5d03d645119f03b43dbba0e0e8ed365. 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/SEYOK1764905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769975acd2a6ac9da5a62da03adde0673747121bc5b2fb5742b5185efc5bafd9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCGJ1607604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35b445d4f9e864bafdd25252745f9bf47b499edece104231d32e5e45db96c71. 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/USCGJ1607605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997fe6cb606dfa1ed5cbc10e000d8426819e139336871421fafbbc6dad3120f9. 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/USCGJ1607606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381047536b48ac0cf1e94719cb949652ba87e04923494531f89edde16a432ca9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USCGJ1607607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5cf40e4e4660d2e5225832f73538f432048bb0fcf66f9fc1a9daa59f9824e3. 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/USCGJ1607608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6513335928d98e0b24f0d7fbe04a08e01853667fca4c58bb537851d14a50c9ed. 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/USCGJ1607610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473b7e14a40c0d8f43ca7def09eb09635b47572195821d250ab9f6248fa31aac. 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/USCGJ1607611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77388beeb568c98e7bd7c247b473ccdb7c9d010a96c508b290b219adead8f7cf. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USCGJ1607612.
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 0x7783da96172e56c55cd5b5695cec0a0e220ec1c481f887a2da55c056ce7813ca. 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/USCGJ1607609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e22a587f667cc2eb62832ee9c5f5e3afefa3ca8ade058db3f07f56a052e1f70. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USCGJ1607613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bf000a28604ed368e047c68f04921be3ce48f17ec882092cc88806bca458f0. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USCGJ1607614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32fa2bb1735c289959e7f10b4ca7a108477dbdcc028240bfbfa3dcbc3b20719. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USDHM1711011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883b7e13019cf44e7e6984374bb5f2575baab71a4445411e8f184c54550e98b2. 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/USDHM1711014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf707bf4f034cbae9e706004736d9dd0a5d3efefe00b9ea4b000facca0aa067ad. 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/USDHM1711015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bbb3540b40006f75e2bc6a2caa5b94d5fb5d4140feb93aa19ef3e6943a82bd. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USDHM1711009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fe4d2608b3326682fbb69c23af69f2703782e2bdbf513d5b5cff0f8303956a. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USDHM1711010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5004c1ce69d47b496bf03e61235bb94beef762bb92a9f9323bb2c08c4bd90cbb. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USDHM1711012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6456c99960de4701ac72cfcae63585dadcee9678d06d7898d3a0792e4520cda1. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USDHM1711013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54478d6268d2cc739285a5a9eabc6fc64d6ba01fff995c6da0c65b5763509220. 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/GBSMU3653139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cf80a04f1e428ac8dac8e1503cdcaa35ea0dd56286d9b36e1f2202e134869a. 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/GBSMU3653138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a2a36ad945d995a5a908ac33dc27ff60017db078f682f603627dc152fe60a0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USDHM1701902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100c4a395625512b08bb30856b0523a158c4fa9049ae146771f82cd0b8497045. 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/USDHM1701903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6291d22846fe22e8e4843a85ad8f2600d13cbe7e3216f4cc3599ef8385ed66d6. 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/USDHM1701904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3655cd2f3ebef162a24567df230bc54388675290f359318dca27548b085d7b9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDHM1701905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47757ff5e201299edbdcd53d2714f4b708ebd820403d8adbcb402bc7e9e31994. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USDHM1701906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871bf2a9940679ddaecb35e9ea77f764491438ec641ec21b7874b1c280c3fefd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USDHM1701907.