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 0xaeaf784362c56059d4e3f19aa37b32bb8541e2cee1e93c44dbf7fa67c59a223a. 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/2e2e3532-a496-47a9-8597-84f8ded83cb5.json and https://artists.proofprofile.net/proofs/artist/2e2e3532-a496-47a9-8597-84f8ded83cb5.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 0xf81087ba9cf87ba0c9d42d092c670e0c78b8c10ecf882e3681079196b3bdf493. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFYY2242105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ee2f191a139a3b0782b2b394901096fc2343bafb2a1f2132e64aa759d62cac. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/QZFZ62210165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1532c4b5009501bfea1753dd8da979c37a4091567c1ed8cc0ba9388c82a952. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:14:38Z), 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/QZES62252914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbdc49a4e48049d763eaef43dec9d11be2e0031947f3814dfe21042651daa2d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN32280560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579a38ce8013fa708a75dacb7ec37217458c04e92047239d6b71abcf79969c4c. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZK6N2296793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff10fdda6a17da2e483b3682289efcc1ae5c9a17add54f021a947d43fbc2c42b. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZNWV2261826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd098ef4454a1b909850063ebc1d727855add48644a5088fc70f0c656cdd25f31. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZES72341173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4204ca2beafdfd559e98cabca5e898bbdce73eabcab7c2831c060b7062e40cec. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:35:38Z), 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/QZDA72465838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd77d36fc77d599b3466052beaaa90f8ae305f0e26552d6008ac53aadfa3fbeb. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZHN32471626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3599543001366a729af0e9fdc417bca8d52f4e160212f4f66be4cf1515834f13. 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/QZHN32471627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4002d410c2afb3fb5d6754a70bc337b2e8e8e7c166d7ee4a7ed1a6c721ac1b. 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/QZHN32471628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17923dde62674a1198d99fc507346916eed3c94da5f2f39bb8550f7bfd5cfbfa. 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/QZHN32471630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591f8d09128f6e8d9841c36a509f1493e06b079d1fc162121e561af2acca7345. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:37:02Z), 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/QZHN32471631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d1c67e7215223e7371c8aaf69ddb9efc6f299a88be3617a9c347012fce4c51. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZHN32471632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c9efb68d8c625c6ae1a35d5a762419edc67de87c56e7a86225559b26f9fbc6. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZHN32471633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4dedd13a75bee32feaa71ad74332feff38ca86b4892f6620279f57ef142397. 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/QZHN32471634.