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 0xd63fe5bf78927f08972ab61bdc6c6f8d71db734947b44bcdc6d47ebd7c170f33. 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/1e121366-6465-43ad-9e02-59b9a7645df5.json and https://artists.proofprofile.net/proofs/artist/1e121366-6465-43ad-9e02-59b9a7645df5.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 0xbd2960ebd56302d7ae829896d9242582b5d833ae0e787ec831e749aa80b884da. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE5751896213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3779c7bdd5e5262190ce5b7072a25c0ebaf272b79d181d6f186fa748799a090a. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/SE5751896220.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867527bb76050a9bd08b91934728f9c4b3350ad4f20900688ad2b062410c54bd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ESA011987777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887e814b981ef31949ab9b743ed8c0afb31164317690b3aff27303824f368fc5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ESA012075445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85eaa4ba8f759dfc33e7a82c2070d98e265e3f4ea7395305be555990b5d10bdd. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/ESA011540370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348f85375ba0bf8c9ee40587a149f2332efe2194e41d9e7c8041b27aad1128df. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/TCAFO2116181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e96afc23ee8dc214ab02f10527620b0f9333b9458c9b39563df09ad475a518. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:22:41Z), 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/FRX452306268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77528e3b4eaa970c88c441841c88356332b5f6cc6979d14ed55dbf2f70ec2adb. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:58:55Z), 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/FRX202458814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7dec82870b8a26cf3480f81fe270014dbac1e54fd1120c044350ec8aacbff5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR96X2440876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0653b09d1b5dedce4a4f2701cfbc37f05a167bfcc8ffc9519a00825d8d80cbe1. 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/DGA0S2457063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f52ef6d02bb8bfb2417f766aee4f05a4e1f1b52656ca4d6d5ac3df8be8a9d5. 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/FR10S2565275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35300f23813a663bb39fcf7fdfd8b5b005ad203ba5feaaa4bd7f7cee69e71fc4. 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/FR59R2443056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cf92858a27e319e835bbd73f51a2099739c0390e21e5c76d2a80292aed1d62. 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/DGA0L2338330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfadab93000a8f48b54ccd90bb6c5d8be66bfe932d489c943870e6c06495b643. 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/FRX202037242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1d73addf9216ced6b4f34359829963b2150ba378bbffd461b273d1361b8e9b. 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/DGA082390107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e8bb86a24f65b3be9e6adf98593ee09f1191bb3cff0dc15881d6e8144fd1e2. 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/FRX202037243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95801530e26fb8b74071ccc54fbbe150835c0a5112b1a1476f6e127791f270af. 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/FRX202135549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3b7ea28264c8c1ee6b4bb9b08003af004d3172e8fbf5c3c93f2231cd580baf. 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/DGA0L2301361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d71bd2a0e99db28095373e3b58f803a4fc05edc76b78e7bbe51be6a8bf55f4a. 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/FRX202037244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb284c24affeeaae28df5a5d8cdc1582ede92eeaada90093a9c5d0ff3b7b01f94. 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/FRX202221645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5712f9e4843a830972da864098d062d2d54fe01f21f250b2608d9a58b3b02020. 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/FR96X2345186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b95f47e98d7ee2fbad5ca6561a23ddd25b30801f2207f34164863837084be4b. 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/FRX762219380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd031ff52bc698c5cbe4add566de9a77ff31ceffdb15edb3bd264c1e9c4df90ed. 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/FRX452251082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592cb44493964af1eb04ddd8446e96d643cd54bd98af85a4b24e588d0fadf553. 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/FRX762219381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101f02327a015c60f7775132535e55866170f4a2703381d7ff919400811894dd. 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/FRX762219382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cfe20d441b51d2ffc756fdcecc6dc230e1e043456a3d2cbd22408373c0a3bc. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/ROROT2028901.
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 0x1ef1aacb63cfaeb6f63c147d1cec2b39b38b57516fa14b27c25c94907b2d0b74. 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/DGA0L2301360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a0a13a36a768e5625415288a47efd7ca985ab9cdc512a034078d7b5798e212. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FRX762087006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f0620fabfec5e8233a9a1c7274054614d1475ac54252c86dbc5c31d86e1c4c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DGA0L2301362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5065ef0f1652959538e019fe599ab9a863726cb9b901c32d170dcbf1aa7aa287. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DGA0L2301363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c1dae294b0a781a7d91978aec883507a1d81fdf24a3bcb1d0a44dfa744c170. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DGA0L2301364.