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 0x3dcacdb5d79292738cc34e78cb808e365825dc7abaa5b762903ec4a11ebd8c4d. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b34d6a8-6c3e-44e3-a70a-564a5fcf0dc1.json and https://artists.proofprofile.net/proofs/artist/2b34d6a8-6c3e-44e3-a70a-564a5fcf0dc1.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 0xdcd9ee562443b2f3daed8e2722c31c473bca2efc81a967955aa25dc99aebfce8. 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/ZA56E2302197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670935319cd0b3d920a4b61f71dae4195ce37c0079d4a80ccd246a8ff7e0e8f7. 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/ZA56E2302198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dae890f19db7d0e32f42d2eeae2c3326a04dfc8d981b921857c852f60928d0. 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/ZA56E2302199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe321070cd8f025150466071a6e6dfc5b1e35ee49f9808550d42a9e65d5f52366. 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/ZA56E2302201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429a658629cff30abfbc4f2da2a642c35605c373ba848ecb4198ce4dd8af64fa. 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/ZA56E2302202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026b9f83aa7532844be59ee5e452bc32a84ce9c4bcbbda56d24edf62459f3db1. 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/ZA56E2302203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf842a7c0f366212191275522b6c6e495979ea0b14189d8a2c427418ee5c6e17e. 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/ZA56E2302204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca2c8bb168d73d0d78c5fae9ebd63c61613d458ff51b8eb330695b3983c0222. 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/ZA56E2302205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e52dc8da7146c42966f19d692a11f8492e28de37bf2a9ec01932ee968283bf. 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/ZA56E2302206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cba79425958d50f43565cce344ba1b594d174adc7001ce699efe3e0b2fc56a. 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/ZA56E2302207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fd6a422d49f2a8de6baa012bf1a73e3b2d42d5f500eebba6aa7a745fe6376f. 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/ZA56E2302208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1631cf906ae5223f4f54717a6ca3447b17a4361c59c95edb97756e92b64d1c58. 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/ZA56E2302209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7ea51df9f30c420afbacdfd6ef1ef4c97ce1051a2600134bf991d2f37e23b9. 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/ZA56E2302210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1d69b7d6a156e25cdcea342ee8f70d82dbb75595c9c0137671d538f3401177. 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/ZA56E2302211.
Green Lion Crew Meets Addis Pablo & Friends Uptown
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e5912c7d9eb24af2bf57fb15c655e57ebffed7c0b730adc3f49f08801afefc. 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/USLZJ2115319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc946e2d34667977ff32f02fa9dca7f84f1f5e745b141fc18e9297607a44a55c. 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/USLZJ2133799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3399b3337fa4ada5d5de12bae1a68bf19f949ff39efc6a8969e331e57c19adb2. 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/USLZJ2133802.
Mau Mau Warrior Dub - Green Lion Crew Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a76148b1e1984c201dc596ec0580f94b1abbe9912932275b2ee9a3fd0ce152. 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/USLZJ2133803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf4dc7ed1e3261e01ec2f4e5844f5a2257847ed5038ba330d0a117b5c292d37. 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/USLZJ2133804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd69e2523451be828780bc7049c1f3c4f15bb5b4647de62e6335580a8270777a. 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/QM6MZ1937528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a219e1daabb1eb076f9158740195006d9a053d2f422abc786fb1ff060f319f. 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/QZPYN2378607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6086490278415fbb77e39cf4e862cd579a46f6b65a3cc985fa293eebe5a58cab. 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/QZPYN2378608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba58d30f8ee12e94d36ef3996e0e4f965d8e3f6dd727200be5330e306bccc706. 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/QZPYN2378610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca376e5c4dd5c1dfddacb8e39d3e640f585e118d2caa3e2f37d4fbd9ca49616. 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/QZPYN2378611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c791ab480a8bd8640db3e3ed3fb82f9eb8d2e363418a66dcb228e1db81c428. 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/QZPYN2378612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f10e6799493fcf5c27369b9ae953ed1a3debf66223b833350f1a644a89b83e. 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/QZPYN2378613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61dffe01edcfd0f6436296928a3b162d6e9b765bf2b6a96185ccb478abc3857. 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/QZPYN2378614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc234ca96613b634578b056f6f8ea11788c59e2b3840ba3b97e0ccd9270da6805. 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/QZPYN2378615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f99a4d2e4f16bcb239ce5c84df0cbc7b4cdf46530fb0fe4bbd8195eecad99a. 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/QZPYN2378617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141421805f9fef4c3b9117571d5f68f5b4ea381d2d747cc3a4ff6cf9448d0e47. 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/QZNWV2123663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4197625f5fd3688337303625dfeccf83f84558a3737bb93d1c0de264a40275. 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/GBSMU6351232.