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 0xb59d085127ed8a74b1e400de4a953bb3ed71632517387564eb56c9d76c084481. 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/2f100da3-0c72-40c8-861c-b9f9e82625a3.json and https://artists.proofprofile.net/proofs/artist/2f100da3-0c72-40c8-861c-b9f9e82625a3.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 0x59701a20cde50042a81f48d5d3858a12f63c738442e6fab15fae439294f5f24f. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/TCJPX2347566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd109b049c3fb573935bb039eb30b18e070c705d74cda04d33297ef74a50abd8d. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/TCJPX2342049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1276ee2a94a0fdcfb910238272bdf4fd8d2df1330e9158cd25ee3a2ea6f7237. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCJPX2348331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1799a4f0ae3eec772154dd928b1bbf875e10ced134b64883e30d2463d427304a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCJPX2341979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59701a20cde50042a81f48d5d3858a12f63c738442e6fab15fae439294f5f24f. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/TCJPX2347566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501c3b0fa2aba745d2671ff98e380a2fc5460418b5a100257f293a376b67e1db. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPY2359419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501c3b0fa2aba745d2671ff98e380a2fc5460418b5a100257f293a376b67e1db. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCJPY2359419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352c3527dd7996d0b5c3a95019da557399e19e860c9181758e26cf2b92cd989c. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCJPY2358822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03be5fba5b401f0fd78fbdde9a0dd911f88f41f0688ea92fff6c92165fa115bd. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/TCJPA2446692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee453799dbb2e516ab7f541b4c664392498d44523fdbecd4436ad0552feecde9. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TCJPA2447107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf341abf96d2ccb3159adc5ce4263a78e5eb4d7e988f37533aa86fc0726ec65ee. 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/TCJPA2447184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03be5fba5b401f0fd78fbdde9a0dd911f88f41f0688ea92fff6c92165fa115bd. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/TCJPA2446692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd464674ee8933a3dc4cee6529494af61be896ae60203f0e9a8d68cbfd8cc9f19. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/TCJPA2445927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873ce5d8aa870fa17697910f088dec9bf60d019f92148270bb5fcaa8e9da867e. 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/TCJPA2447004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b7475348956dd5f5ce6a9feedccfd0429803665f028071758bfe248d9bdea8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPA2445881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b7475348956dd5f5ce6a9feedccfd0429803665f028071758bfe248d9bdea8. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCJPA2445881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22a28858087f95f3762dde41a3eb0bde96b98e8a89790d820331d4e8b4da40b. 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/TCJPG2506340.