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 0xebfb56a2e8e68492635d8573b49a9fce81c5428381ac0b3d06c9af07704ab7c8. 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/6a5f3314-819e-4e31-a39e-63edd66d1198.json and https://artists.proofprofile.net/proofs/artist/6a5f3314-819e-4e31-a39e-63edd66d1198.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 0xe2e1b7247472658ca3cc05f519775ecf1fa8923f424e3be97a85aef8b584408b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEZC62125698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6032c4ca1570cf90046f7e1e7865268c56229139ad2cc8cf26b5da0e8f0e4ac0. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DEZC62135446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72be5d8e97ffb8bce1b9961eb4b6de88a00f2ccae7799663e19bd44685ad2bca. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEZC62247768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a0bc8188fa476bbdff64de955ff41c1578a24c391ae08e5e1392033f804856. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/DEZC62250229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70522fdb0296e35e8015981217656f2e97273815153d7148bd8407a6f4cf1ca3. 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/DEZC62257315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899795236ce7bc2d1e9bca0c02294ee934d2240422cdd8d4d788b3506d76280b. 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/DEZC62268443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69005a03733517877de10c5732ce518c27d0e20cbe6045d30f5096345db7a253. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEZC62269754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b932e66c5c0a674baa73441acb8e85a78df5308c5b6a95b16b801ad5686eda0. 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/DEZC62278620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf68d34d7a6c0dae97cd9afee91f381210cf8a9d79f230c75ef30843fca853ec. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/DEZC62282482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51686de7bc1056f1ec3f5e48321c888d7488131840d6295a4ed85c10b3d3f342. 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/DEZC62284609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc65757c9916dcbb0f142c0a60093f30aca2416e3b005c61d56925b7607f97e. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/DEZC62291361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c233d8af894c33abe497aa8bc0d53057a1509a71359bd4ba30466bb7f9150fb. 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/DEZC62297123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e10f9bac313481c161cbc81957491927ad64bc786ea9cdc98be9319c03bfb6. 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/DEZC62207001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19ec4b2fbdb347900fd5149fdbb294e74b3a589b092fab963c52deb24deecb0. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DEZC62213084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7c900d222e5ae3da0584b37a79e7469435894abe96e9613aeab86eee6293ef. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/DEZC62347083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef15fd1ca441534c9b5509499e38151e3d5b19e5797ac07332d583a9251cddca. 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/DEZC62347084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745e251f79c10604e5cfcc96723127b2d2c860bab220f6a12611398423e37e66. 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/DEZC62347085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f264f5e1c11265d2d7e33366fd095e11ede1cd37e10041f7cff90ac4c45c97e. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/DEZC62356114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0326a3693f96d59f0e90409aa880dbc980be39751a20ea6e5b2048d788b597. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEZC62356115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de9f406db0603447f1ba1ed18ee6d9f55c9a4171a7df38de0a04f5bd5fde712. 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/DEZC62356116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f06a909632c2a8053b8636b80dd702c1218c4f47a8a3d1c126df6db2f2555e0. 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/DEZC62364127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996d9ba8e3aa99d29d503f7a5a89b54ec894d5ba87950ed1395e1bf8238422dd. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/DEZC62367707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b6a3d38759475d36ddf4b664bada0a3fc6f0e97811559c1e4d8756b9ea0271. 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/DEZC62371073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc328d0bf60f9411d3a44e9040a9914fb714529c264f2ab71adc59ad23c8d1a5. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEZC62381419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5e2c6f52a2b673eaee3d0d0fec64237b3e33dc339f122085e1bbdde1c19b07. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DEZC62493714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1cf05a9362348dcd6986bc10085b3fc89af3b1972bdc7f6efd4bb2686299e3. 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/DEZC62406559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa9307ba592e6083fad27dac72f7e725709b651efca32af9309bf03928f51a5. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/DEZC62411267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6958b532932911225ca29f255330b8318c3f88364da15df7bc76bb63727078a4. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEZC62439417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c977af94b45db51e567364eb650ca7751691d05404bdc6f96afef3b00a6197b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEZC62444908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f381ff84e84234c33f9847145029dab30bc4d4a8e0835d959988fe06b54fff. 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/DEZC62453863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6874ab19d081037a2c952fbee9e738dd32f6e41f18f7277dc29bc43edb1b1650. 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/DEZC62456347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8eb0b107002e7c2c1bde1b52880157dbb253a3afde69d0bb901ad1fddd5c05. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QT3EX2533554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d818ec3dcfd1f64341b142ed43dc2084b36e8b4087980772985d974ff13cdb1. 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/DEZC62359825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5efb2207ae3fb76bd5cdd70c285d8f21b5baed4d6e7163b50ab6a88324a2a83. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWW2470427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1e1317ddc71fc4d9c4a28810d5092a3afa7710518c0b63df28d01a7f21761d. 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/DEZC62437122.