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 0x625736ed13507dee8c840376f3bdd86e60ec6ee4e9fc08dfa0df31f3e7cdba25. 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/c575cdff-fb32-4e9e-8d40-df8ca3d9cddc.json and https://artists.proofprofile.net/proofs/artist/c575cdff-fb32-4e9e-8d40-df8ca3d9cddc.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 0xbcc7788931151e9a0c44f6837ac9e0ea0df285649d6ef39e84d75d0c2182bca8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDA82262958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159a9fdaa6840a5a08bbe78aca339e505cd32d8c87611f6f6f3ec332a38f2555. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZDA82262959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4544717771f73f2e0d7977d9835dda536498047460ee2a3978e014b8d448b668. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZDA82262960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3f84f6880b47c85801661cf222b0286155394d2bbf1c9f70bcef2e9c3cfdfa. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:19:55Z), 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/QZDA82262961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefb4050a086fa64056cd6129d36bd39893f0b4e26a3c6506c42ca4fa7854196. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:50:32Z), 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/QZDA82288331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c80a3f24427b1b8aed80e1e720929871ea7fbb0ff9139d44b67e5a18efca7ee. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:37:10Z), 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/QZDA82288332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9698ba7406abb2e4918d92fcb0a94ef50660bfd70cc2330f2625335e0ffce50. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:59:42Z), 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/QZDA82288333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a5cd83af504a30d097767572698f352cff81345560519c0538c4219bdc11ca. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZDA82288334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53551b5173f887e7e00eb865e115f50c2b613306048ad2aa49f180f9a190ea3. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZDA82288335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb654beeb29ae7f1d426ce9966061c435721c4030b27f9bde07642b932cdd27d8. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:31:46Z), 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/QZRP42101298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0c434be903717247398f0f480da74fc6739017f2d1e34c00e43c1d76ac7a98. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/QZDA52273229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e61de63b63911e449ea32007e6263bf7bd7bacdd9e6d61674ac73245119257f. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZDA52273230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b3b6e58628318f99d0ecd3970eea91bdcaad32168e8a13b7d45cdfa8a5dee5. Chain 2 (Bitcoin): anchored in block 957685 (2026-07-12T09:26:00Z), 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/QZDA52273231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ae260cb743b424e035f7ab3e6b517faff703a83b6322c490396773fd6cd45b. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZDA52273232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f527ff468fab39767974d85041340f9dfa35b9f572591515372059a5449cf14. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZHN42387982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582384209245be5c07477c352db107cc26400ed7bed4df4f319a98555a70d788. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZK6Q2354432.