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 0xbeb6a5715b1f48d0d39545b7e2fef0af98c724ee091ea9aeabd7273cefda849f. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3fad1e31-2172-4775-9ec1-0f2250a43da5.json and https://artists.proofprofile.net/proofs/artist/3fad1e31-2172-4775-9ec1-0f2250a43da5.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 0x4c630e0b8d814a1fb44719f8811b0bd7beb9ae372007fa33509cc0f546936d6c. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZHNC2195213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254436c3e74fc65dff9f7902e1eaa1809924be74c75ae12a5db13915fe149b10. 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/QZK6P2143053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddc5ac1595f8e6625220114327609b39c47aca4459d0abbffce242e9055f1a2. 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/QZK6P2143054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9496585352fb6d019715cadefb0a3bf08f3c33e94aca65eddca108cd0f986a15. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZK6P2143055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddb685cad65f6e505d5bf769e3633b6b64308912dc9793192898f52019cf135. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZK6P2143057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55832b103a2711b76da9c5e65a1ff75a7be7356655905f890d3459d29c1045d4. 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/QZK6P2143058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91247622591a578d4fba01939773d56aa940eae37b87da6c00e2069aad14df66. 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/QZK6P2143060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ee23c65a2704588a585ec51c241bc7a9fa40efdea5767dc75230f62627a34e. 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/QZK6P2143062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6384692746e0ecb65f9288a76d58bc36d617dc51a83888f2d4b431fd736791. 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/USA371021470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c443eb419cb69ce98e5b692ff98e14dccc4309d65b94bbff45d82e4fcca2080. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USA371021478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8faf26aecfbfb51bc60c780e6c564537aa82f4cd4e2885a2af4b3d16cfb2a9. 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/QZTAS2208727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb45048084572426ac00923477b2674cd0a09a21ae6ac685a6564bca96492cc6. 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/QZFZ32258632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2762c70435959427faf58cd96c388ef7f8fc3bb3b312ee168352d9a0d17cbe0. 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/QZRP52189151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b879d0ab04e8ed2592369c328263504a73116012e46874a885143193c7d5b6b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZHNB2137072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6ec152af2b89fc6107ea85dbd79d7eec9ae6d420679a962d197cf74c6adb47. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QMFMG1528747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f71fe5cc4d60f29c82470d9d6a442a016561c4bd443021646611c469c66869. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QZK6Q2156124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8277e57a48fe884b213ac25cca784d08e3556cd61d09bb7adbde0fffa4d5ed8. 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/QZK6Q2153985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdfecb46232b8fd19934594933772547e640e836cdfe48a288cd7a47a2bf67e. 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/GX8LD2412524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdaf211178715eeb74fcfbabf22c7085fd82995267703ab9d2bcee2ba2ed216. 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/GX8LD2467657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2466d12c7af59c3793a075d6c614247e705418cc9cbb2ae0bf2a27e8ea0d6006. 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/AUMGB2300910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e65129fa12bf17afb812e2499422c1a75c7f85d1ba571cafa55acdfa3bb62c. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZHN62218853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433dc82dced036c2af70b35a461b3ae23838e59354e176161adb9a085b508067. 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/GX8LD2453609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4979372d97543a36933bc71d119b0d207a9bc9e6bc8b68e1206f79babcf707. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZMEN2344583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df25fab9f174568de88fd8b07ce26c253eb13ce81c507e4baae07c541e3ef72. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZTBA2362369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92dd73bfc0953cd6d43f08a76ba76d78637202079e59958404a9b9dbbd0f3b10. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GX8LD2465996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ecbd594775dc89eacbf5d10ae2d78fefb3b49a2bffc0fec24b9f2040e71527. 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/GX8LD2418872.
Overtime (Original Motion Picture Soundtrack)