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 0xa72d2ac5b8c1bf6cae992dd6ecbbfd7c20f4e343e120dcd28b4f81545b8d4c32. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15668720-ae03-4ebd-9b95-26c98104f9df.json and https://artists.proofprofile.net/proofs/artist/15668720-ae03-4ebd-9b95-26c98104f9df.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 0x0651476a90e5de85b73f482358f7a67fed5dc6e35499ecb91e03b061f2a7d0cf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NL4CP2000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d7c3559c36639992961515bae45d40f8a1a576873ad93656fb25e88950423d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NL4CP2100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcaa00de4a9d45b9c5f20f2d9754bc7580a2f1b18fabcc798ea5b561cf0ff30. 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/NL4CP2100121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad90a1482f42ae58f5f3653fd500db48b70bd2ada85a43d110f56122bb7df5cc. 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/NL4CP2100158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9546e8e95654e6c2b43f6f7e20185253ca31752bab33ff520be75e7f3edb49. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:04:43Z), 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/NL4CP2100322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9770a0a899875e4bd750981f04b68900f71c6c5acf07b7bab5252e7bd27a6c. 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/GX3Q92052955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be92328cf71af75ddf3cc72e44bf9901db75ff6436710a1c48addbef3fa2ca6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GX3Q92052959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63112ec07ad2c68d6f05d2067d9f11469ed2c59d390235ee3fe2b2a86f9ec461. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/GX3Q92052967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a54cb23160df27e74b25155818ed0b8823a99dfa0e67aac3be7a6e00154818e. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GX3Q92199484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe345b9ed945d5f3e824584111d6b9b5d84549f58f61084cdb1fc00f6fe1eed6b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZFZ72296592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9588908c6172d03fa032ea9eb6f749ec7fc85601d4e20e2a830e39dbaa583d. 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/QZDA62234031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b0d93954659c9a69833e06e0d70c31fb6a6e980a17669e6f370aba84264ead. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZHN92290466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d737947d08b8dc5307fff287fcf0dfd0496ddbbe11ec84903113d72ca1f0d3f. 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/QZNWV2240931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf756cca6c27395e74de60c6bd51dfc2526fe26e4c96e08957ad418c71b97754. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZTB72257123.