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 0xe43191896e93ccb57eb18d388d84c870848735feac0373ffd0731e023ba90213. 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/eed81ea1-8c7a-4085-b64d-4c961d8f9089.json and https://artists.proofprofile.net/proofs/artist/eed81ea1-8c7a-4085-b64d-4c961d8f9089.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 0xe9cf8f787cd802dece1d6de8b72f31ff0292d2a5c965c4c9d92b0fa574a1cfdc. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/US3DF2451598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c72e2792058d680aa51c4b17542d795d302cd2fe4e707f2194bdf2c1e78dde1. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/US3DF2451599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb84ad4e5ed3dd7ac318f8319abe6919407d402d02b6300430d56544e4e1a5b. 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/US3DF2456100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3b5d6271255f6350248a0e74a8ce1ffc80d428faa311aa421c5911aac94519. 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/US3DF2456101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd373519d6610b19f6c287f12c26d00eb2a4ee3c1454955cccd5fa6de78a3e6. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/US3DF2456102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9a8d2f907807397104c01e8d27f526e3effb0e835725e6245d387ef095da67. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/US3DF2456104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeae2c98b1e6509a333663cc3be0fb04494a1d1a8a6924436c73f3972399ca22. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US3DF2456105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64096448f8142b06f54ef93881b763daf01a324b3665ba80c2e9de9fb5205a35. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/US3DF2461479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390593b5fb06b2e6cea899dc5796f093b2bc8455fcfd60e8e8e9b291ad9734cc. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/US3DF2461480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2abab08918c55055322e62390c3252f3343dabc5b350887a56012379a1990c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US3DF2461481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a8d74bc5342426456db39cd75fefb38bceed69d726f5ef5c76323ac53b6457. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/US3DF2461483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18909367811f4c30a0dc9ede53dcbc0b9a5cec5b411ea7bf60625a8b891fc998. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US3DF2461484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d40816252f454c13da3db244e7c95ec5e6654cafc137685c50906b10622cab8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US3DF2461485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95b354d72344d2e5770b46f4f289dcbb99b4a804d787b6828b17c4b9e778d42. 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/US3DF2475249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8d255996cabbba8907f20e32bddf2f1565fc94eca62eda89cd1e3e408eefeb. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/US3DF2484648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282e388c5ad88f3b67c62828028adda654cef43a327970017eeb6407ec599778. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USANG2405113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1576caf66d94efc1b24de00acfac709491685418fb281d5c9bc4878d46595543. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USANG2417577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e780f1b940c8a98a8c1447084374ebe142bd47ab81f57a08ec9c1e0b4751e3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF2526299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a117e4d740dd9c8a6adb3ffdeefccc0b5a62fed1a95c7662d38e85049c73fed. 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/US3DF2590993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee02282fb1dc614b20967c4f018e69cb24b6d92c671dc60dfb3ce2c752c307b3. 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/US3DF2590995.