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 0xae782a1183ec5fbd20604e5b3f2c3c9fe9961a4e0f6777e679889dc49d49424e. 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/6f5bb0c4-0915-41d0-958d-2e5af65809b8.json and https://artists.proofprofile.net/proofs/artist/6f5bb0c4-0915-41d0-958d-2e5af65809b8.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 0x25e85e9e606fd02b73b90dece6a597f7afc47749e0885ccb37de04f57aa77f2c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAHG2321962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20acc590c5e364d91c19ba0d3d708e4c8855ab0801b2e0e8177342d2d808bb8e. 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/TCAHG2322440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9d8ee34d2ba5be06b29a40b5cf725d8d4a2ee869e15c2044e0be0fcaac94b0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHG2322558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a675b0c253ef9d4fb508f911c5c8badb7df7b0080032529f4ec094ff42fb3a. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAHG2322579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb256bff2c18c13fa7a30e37cc181d6b4fdbadd36f78c94fc193d34a889af7a50. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TCAHH2384626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbf7ffe34e1cbce3425b6691c508eee38d4371d3e52a48bbc7d52f920085b9e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAHL2397036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea116f81fb0389375f44b21536521748295fb1f216a7ec4f0d0c6156808fdf2. 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/TCAHR2312672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8615032979a2eeb6fab4ba72d5b90285b7c038070feb12a00f3aef717d56b7b8. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:28:59Z), 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/TCAHR2312688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29349bb5f303f69aa050252ec752f43d6f0de021825f6b75f1aae3ab5f7c0c50. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAHR2312708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88a1f202e0ff155d5e3a4caa19dd0fc21083d65d3228f62957a252d798037a2. 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/TCAHW2495203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa599798bf812ac660b86915c2e0e27971806a71bbe3fad42be3c5a2b6f7707. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAHW2495222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a0a700b53593a97dcc8a385a4d58a62d858a9ebf2b6a34dc9dc69ce1a6b8a8. 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/TCAHW2495364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a74fff29a9d935b07a4fe7597af559309e1241a1d2d8be54d5be8bdaf69d87. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T09:11:08Z), 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/TCAJP2506393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1764a295b8a3b2be742d30eae9a24535017023d26b2f584b4a4add48aa8a5c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAJO2506410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6dc36ad10e56812055c656c68adfa7bcac1ed8a52762d883b23b610305d503. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCAJO2506436.