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 0xe1a2673ff903e17535346742a3a48878e4f588f629667ccf48a1b5c8fe26d53a. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/585e3154-3892-4ac0-b248-9a9dbf0f9bea.json and https://artists.proofprofile.net/proofs/artist/585e3154-3892-4ac0-b248-9a9dbf0f9bea.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 0xeac113ed5b54a80873479feddf8d8cf3335d99bf8ae093dd121610570b5500cb. 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/QZMHP2316103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bec9a7291fc4bc4bb87e62ce29b5232356e3d74f2bee5324d1f11d9377f303. 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/FRDX62206770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3c3652cd7d8be2ab44a4e22fb0e397b2246c86d26f6cc91493fafc6b89ddce. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/FRDX62206760.
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 0x5360152810b0e45d5a0be4649928525603f48ad66b2431e00a25e39962fd647c. 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/QZES72436825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7414d09e202c835decdc34087ab796b240c82323548c4cc382ed9ff639e9dcd4. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZES72436824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa916d1df124b6429c339a4436a98fdd3324c102d2f1e9908ff523825f8ef2523. 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/UKN6K2202748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083e1257388743ab74dd8629b04915a40064725550b8d889832fa4da6b0626dc. 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/GBKQU2302154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c8e4c2c94b19795907295cfeab6fc7c37c776fd62840411ddb7e04e3733058. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GBKQU2302153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130e1ed8310116ee7a5ceff7b067ebe27be50b76c8b1c8c2b9607723bc21fd91. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBKQU2302155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8befe3cf2c66da41a0fd7b1e8565b142bd9c64676ce34c0d301007740bc559e6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMER2202508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525742f6baeb31c20f06ae540589004099e01fed28dc38fa8ca450f7a1073d47. 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/QZNJX2110985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea8b5af2d382e445106f47f3b613876fcd885ceba745481b5f6c51570ec8dd2. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QZNJX2110982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd261a4b6dc46aadffc81310dd93e1cd516b98600820608f89054c55fa33a4617. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZNJX2110983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdff1bbd012515250371c514a080bd82bf6c4a3bdb05e1963d2c3d6df4c974e. 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/QZNWU2007104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323720028a3b495a8931fcbe05f0d38c83c00e6af6025503dec266660361f95b. 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/QZDA52256333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0ee2f75ba924b49c69dce3c202938cf8400ae79418c30fb40ef6bdfcac5a22. 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/QZDA52256334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf0e83119ca8a3fec80e4b5e8c29af71f227182cf7a5db30e1eaaec52c0888c. 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/QZDA52256336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8238157b481d7fb778340d20dc3cc3807b7e0b48ccfc75d34ae18da044bb5c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA52256337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b46bf3820aa642f25650e857a05f422cd4469ada7cbdcca19db2892577bb6dd. 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/QZDA52256338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8310a4f7b3975efaaee250c1d5164bad0fa3349dff64f31038654a8a71eeef64. 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/QZDA52256339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77ffd16f057089a1f58d92b55741097453e76d524af0b02726d6fad45e1078b. 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/CA5KR2371255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2803ead86c6a5084457358b2b96d2b654ccf4842e42cc03cf642592fe442d4e1. 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/CA5KR2186939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be027fed51a2f4280d507647a422976495417e786931a655a93ec9647af2bbc. 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/CA5KR2186940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1eb1912dc275312f0a40786038422feb0f3397f899865ee0f07ce93b84d3dc. 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/CA5KR2186948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf89e987478b7d04d04dcf03d0820ded230bec06c813b602f65e5371ca455f3c. 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/NLCK42210017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b45bf0c840b5f25f0ba856bfc8a437597dfac52155214e7ebc186891387c459. 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/CH6542214582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95551057e82b8c0bf12b0d3d59b111edba57810f45f6fbc4deb80c32b5e47d3. 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/CH6542214583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1021ed0151638dfdf34366e48c5871e2f7fb1ac5355ef60d170388ab7c1fa940. 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/CH6542214570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715c6e86537f5b3b8ab26b578921dcf994b1b1162996c054e8e03aed6426a2f2. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/CH6542214581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b26df03fe4f1c5245292804b8baf18808c9ed2cbaf82bcf6106b5ec5cf5db25. 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/NLCK42340743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588d2bab5db912cb59953b70810ebfebeb29867b6090727ed8725d9ba352e8c2. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/NLCK42340742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dc16a5d810b6bd63c80978e3efac3d61ecfa98e66fb1f9bfd4ed12de18cd68. 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/DEZN82131381.