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 0xc83c0e1403832cc8d414caa0a18abc51ed896e3da382085513395315639b20dc. 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/e8d5b0a8-ed67-48c6-b390-e567eed0ebcc.json and https://artists.proofprofile.net/proofs/artist/e8d5b0a8-ed67-48c6-b390-e567eed0ebcc.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 0xf823d0ee93271c8220afd4b4c1065b4b6c06dd2804c6bd0f27fdb24c709229c9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBKQU1295354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7eb05d8551f2691309ec188e4595606b9fb8d36d5b848846b53317084449a55. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBKQU1295355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7be608adaaf63c4722e06b00a252ae35ef18d2689004adbbf7af51766b0ffd. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/GBKQU1214307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7bf7c255b3df4fd0f02bf6de5681a22cec2dfa03b18bb4c797146ae33557a6. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/CA5KR1837185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394f6c1e7ce6df87e448a8789e44a3daa92e4f5bb14029b1ab9bb4cfe0be2dbd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CA5KR1837187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202cf165931f625dff8f8f037a6b3d2c9b792aaedb8b7e1915c0de832be82841. 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/CA5KR1938986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1e26100770187ded20a6c9319f20850112666af09672c99833a9de0e903a97. 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/CA5KR1938988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77ae89e473f0c120c2ff9ed7a7ac6c6c5162aae36f98363b9bb04359c7ae88c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZJRB1992654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a04e35ac75254b95e52b14772a3e5dd39075342a1db84f3c355d49b3e172a3. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/CA5KR0038972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc952106956a9bd1c64797cd27ae28a165a794558e257dad28af137a9f2fd7a06. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/CA5KR0040988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cccf1028adb5b5551e1fca997a89a686d6c49b8699737887fa265b5d8af1ef. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/CA5KR2234078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a04e35ac75254b95e52b14772a3e5dd39075342a1db84f3c355d49b3e172a3. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CA5KR0038972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc952106956a9bd1c64797cd27ae28a165a794558e257dad28af137a9f2fd7a06. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/CA5KR0040988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2ad403838d9b592fb2240d540a77ba6f94bcae53321925cc3a1301b469a94f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CA5KR2483655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe463da375eab6e95b5f198cf6ac7fc179100f6f25f90a5dfbd9a917e8886d70b. 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/FR10S1936123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4667a7afede864382a267b40415ec73c5b07076c3467daf7aebde6ac38a8272. 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/GBKQU1295439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dfdc94db7ce9a79ceb90b08d8c1cd3182d1337a35ada41f5999907cbe54c80. 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/GBKQU1295440.