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 0x5d55797b391ce2e49cd4e169d419a478b788f10d525fb5ff5d949d97bebfa9bd. 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/6b468ead-4247-47ae-a845-317360a7f956.json and https://artists.proofprofile.net/proofs/artist/6b468ead-4247-47ae-a845-317360a7f956.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 0x8470a26cfefc1ef9fb964c2c1e18d4183aa6b5f98881a1a8400a35e31bfe0730. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZNWQ2227329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062beef08f3753b200d059724697d062b9f60e24f8a2d6b38fb36aef3197a418. 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/USA2P2313455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ef8cae5e9d706bcb66c6c5121cfa01193f456e8331164d3ff8c6fd5867d91e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USA2P2340602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42db975af8c44827eb4260b7ea77344756184673ab7d99f10664e206f4820267. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USA2P2332689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cd34027fe51cc052dcc6a5cceb41cf4c20f2f0913ddd989eebd862acaa7a91. 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/QZQAY2329366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616ac010b69fc1566ae90b2e0b54d25ffc0f5e8a5c5e6523d141e5ea4d9691a0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZQAY2308280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ff62fdded3cec034d06d42877a70d0b17f0a79f338976c4566b326ebba06b2. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZQAY2360105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b25a47ad95bf306a6748d2c7221c3fdacc1c162173aa4d6aa64eabc1c951987. 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/QZS7J2361134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81851c71fa4d35dcbff0449915d7d652509446d6abc70f86b854fbdca4357e0. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAHQ2325377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9428f669c057c7244df9529e317416db3c83116929841731e9e31070f9adb0db. 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/QZDA62407287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257e39b2df6cec500a2fff44b6297630648caf63bdfca7dcd37019d1e9e5313e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZNWT2437236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c6d91dba6aa3beed81428ce8e88aa93ce4ad044ca278d81c6ee334025f63ad. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZNWT2437238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31a2db3e8b38f1622bf3a3a2df70adcd31b8b00931d66a3b9adf5e3130e031b. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZNWT2437239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271a52f09c8e622b68051b6ef38007933f0afc81f0e76b7bbf5e11d1537a7484. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZNWT2437240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f231cde1ce94cb08dd2a947cc7bec373afba12d4e01e34fb6eda7885724484. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZDA62435578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca113bfc2828878e23947d2641b95b886341e91675d33a369060426058f34d02. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZZ7P2496783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45ee0547ef429ea26cc10fb70565dd19d9879d8f3583019cbbef39314b248dd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ7R2475684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda0c522a56f02043a9e095aa768315272a4344885afe51ee6365ab48f5e52f5. 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/QZZ7R2475685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177cd5e5d516154f84f59fcc501ce23099c01f50fc2d772b3aa9cbb1cef77658. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZZ7R2475686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae785fb2fbe125b3b18b7f6dfa9aa4116be274dddbc7bfa4130b15488c131779. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZZ7R2475687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e4840688f4c0d78ca3c8f764ba388e8e471560f1f42544174538ab84af6cc4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ7R2475688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19280680a39d7c3b6646b4541aa1d3d742f9ed15776d4807bd82886ba2c44dda. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZZ7R2475689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3105df9ed7c186e286a4bf701e3f824e8ba7de24187324b5e0c89d0528bc113b. 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/QZZ7R2475691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeefa4166fbbf82b8a9dda08c29f1cb26dac078aa37d077566e85ba62b2e959e. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZZ7R2475692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549c8360435afdc6b13f632d5afeb2b4b3cc5cbfd5db61545eb297c323e8a932. 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/QZDA52592374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca113bfc2828878e23947d2641b95b886341e91675d33a369060426058f34d02. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZZ7P2496783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2281b74fad05421e7faa0a7cc0ade021c7a0db6d3aeb380992b902a0cafc5b. 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/QZTL92579642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a1ef4ab75f6e70efeca8458f562da7bb1ee786ceeff388d7d88889f5e26365. 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/QZTL92599486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1415a2dc95daa173b7cf1820c608abba71886abfbe7a37176e9967986b39d814. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZTL92558386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987c98f7c4123a52fa1808f3b57754ebc39633f8e302c1d9190b05ce3e3748f2. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZTL92537392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d2ba4751757980d622b7b9a5a473354d7048ec332c2c6dd8e57749685cd573. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZTL92591669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3ef6a6280d6bf13ab981b981ae1865fd7255b2583370b462ec000522d04a0f. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTL92533588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb43750bad70240abe6b6616f0b9c29f3e5ae2c09e0edcbf554ee398ad19ed9. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZS7J2506694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfcb47221f4f76fe31e1206852ae9c802d28ead9983a5f545ec90b5aa7103b5. 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/QZTL92513711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a9bfeb50a6859e8fc7bf94454b85853cb5db2c9318b320b8f80230e2c87acf. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZTL92556271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f1a86121d589d411c9f9b29911d0e8c0127a2140caf8ffcca6372792adf61a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZTL92511341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b517f4153bbbdfdf308092e6070e2b2362ddf71e4efc849755619cd4f714bf2. 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/QZTL92503116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c9ce1cc84e63572e7f460e66c875538072a170769e683794ec6473ed6af7cb. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT6EF2572931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2b2c830a156ef945a24d72afebee8a4edbccbefd56a3d002f511f9d0053fcc. 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/USA2P2315445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c8ea9185f77195bf564755afafc8903b8494a301bdf64200fa28f02a6992cd. 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/CA5KR2358304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351033fe18a63ce5d062031edbba07ef2595335b5a95798c833525f490c7abe4. 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/CA5KR2358309.