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 0xe99b14b81d503ae7554b2c1d8c317048d6233a1d27eb8fedef0a594235020e4c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23dc9ea5-d269-4b2a-843a-72d53c907e5c.json and https://artists.proofprofile.net/proofs/artist/23dc9ea5-d269-4b2a-843a-72d53c907e5c.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 0xb7066078b218cf43d4983a5123ba6dca8e8e9e41c37a9fa8a25b1f13f339cffa. 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/QZK6L2041311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe031b886b16b7f6bcea6453d4c0e0e8660404e29df4880dba4fc584855d67bdf. 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/QZTB72225609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab2339eb1e5b2c589de4e7c2fcc30218d9604dd1af12d9ceb7dce8211f9e763. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTB72225611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b58a60c8abd36abf1aea8dc77b98b3e213b446c273dd277c7a8c59960bb8847. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZTB72225608.
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 0x03b96918cc3c90f4f8947400a2383142c3b9e7a4ec93854648b4ddb82ae95953. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZTB72225613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c6e86c5b818a132d89345c84b57defa58555dae69873591acf5024a029b349. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:19:51Z), 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/QZTLA2453927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa044137ac5365dc253aaa36a0ec0fbbc92d73a0f39c8996c23ffde60594b9c8. 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/QZK6J2464795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf257e65e4aa08ad6b7cd03153c4e8ca97d9fd22a31f21d554d65a57acb0212e7. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZES72398466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53f031649dd177c0b55bd1c41de98772e5f7873bfce33de3a51b8b2d5454d4e. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZNWQ2209640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0a3fe1b93ad81766730f726a94e086b3915b070d6ad010e37cac2d18d88b3e. 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/QZS7J2487217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa103438f4bc25dfb0b7748e85ae6b868ba18580c699ce41ad2d9669d887789ca. 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/QZS7J2428946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ade69850cdefe627326dc4b1d505d1f389873de2a97e097cee1137b69499ef4. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:40:01Z), 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/QZS7J2467154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873a03d07d0eca1fe752d70085bdd13e6fb60f88fcfb98d799609da57b3f9ebf. 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/QZTLA2414714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc829e6f8e0417c9cb966f6e674642291e81743b2c4f99c75fa5040e9701c82. 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/QZS7J2426784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f352eb69a24da52009ce04849cb1a5d34b79640c7bada7f711d7855d574a50. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZTLA2446592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3275b1011f8cdcada39c0ff9f283179dfd423400a13d16b38e7647604b2efed8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:22:56Z), 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/QZDA52520721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4aef1ea4c570edd91b8a8b069934f1d931c7af3b6335ced6658c5c09ae861d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN32509772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a28b921e3fea6e0946108029924e0b857961889f4b2461e0c114f5654116797. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZSYP2325903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cd0c331e09ddb97af8133be1ff30d6596cc063f400cbd980715ed7d21a6ef5. 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/QZHN32509774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24507bc5e37692b07c271f331035e827bcb3b735d5462b58e48d4c38808bb8ba. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZTLA2586804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6678a9d8af7da0ad262fb893038aa85b5c15aeda6b1f79dd9c43002d12e6f0ca. 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/USA2P2421401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a82fd2035eeab7b1961be2a0b6962ae16a762eb034dc8085990546e78da1b35. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTAS2498964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64eb7c45351f1439ab7e2058c51f4142a733ef9d035ce2a35858c9f9a2261499. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZDA82499713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbf142fd6ff993a7aa79224175d13bf832e53736036fcf20c6bec84186b0a9b. 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/QZNWS2457456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bad3745b38cb5c4a262019726940f41adf848415e0098a0088a981e5f85ca4d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZPLS2441592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fafa2ae3041a4322c2eed6a1899873bd359dab8a0222fc9d8a4320e80f0692. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTBC2392674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb359e0e236cef3144632565b0e15e042b4f32844665e65c3eca3afd2225a9c1d. 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/QZTBC2392675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd1223d4930b149f6fd96854d213d6c67f900da0683ef98472fe1dc74033bd6. 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/QZTB72384071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bad3745b38cb5c4a262019726940f41adf848415e0098a0088a981e5f85ca4d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZPLS2441592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d50955dcd4679c267e739442321886bb53932b450b503439e850bfb0b888af. 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/QZTAS2498968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f3cfe28201522b3799b0e82d6873ef6caadc1d90299760c3b44f8cee2a64cd. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZTAS2498970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fd98aaa77e5fa6bd0c8f5762cad11389de964972d32913f7d4ae00ae42ce1b. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QZNWV2489156.