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 0x6525a3c830c70d68977f85b8e4a0912aa284702fcab25299bc3a774c91201946. 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/31649bf6-b7f5-4bd1-a82f-5ed5f750bd8e.json and https://artists.proofprofile.net/proofs/artist/31649bf6-b7f5-4bd1-a82f-5ed5f750bd8e.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 0x1fdc47c299bfbc9c0d33a10e9a5bf808e40945e6306a29781f11cc7afb2065ec. 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/QM5L81800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfb8f44ac0db7924aad2124dba909224e84d709124ba82e980aa77b580f3081. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QM5L81800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a80444c5e125451b841151d7bc98592ff9db11047872ef491db52077926bfe1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US58L2488101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6a0b6ca2ec368c11245bc8026555f04d27c1350b99f5edc65d3933b31b5b97. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/US58L2488103.
Maples, Ash, and Oaks: Cedars Instrumentals
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8fb4534bd59d20509d9aef2ec70a070a9da1147537d2f0871a5502092de526. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USY6C2135209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72e0415c0098c10d582ab036d257151115b260c11f76bf20b8892c15d5ea180. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USY6C2135210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c3fde03e518481ff01a864fb35238868754b3dabb56340fb37ae47ad16764e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USY6C2135211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2d0f927282ee12b055ca249b302e217b670a4380a481863612f36cdac11090. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USY6C2135212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b1d895cacfc058457c126c7070029ebbd1ba24ed0b7b0de4ef3b97cf077644. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USY6C2135213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095c1269e02a7feb14491ffd0e4367aff1c5f46ba02eee52948a2ac53e5a1d5f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USY6C2135214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e546d69fd07da2629565842778ea71318a7fbccda67cf22c5ef6f38e7a6112. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USY6C2135215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5524d306f778f602997d826ac7f496363d8b58b17e0ebbe6c8522c52ee8288. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USY6C2135109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c77e289a205ae34acd7709451c2b5c7e3e377abda5ceb2b41081aa4382ffd9c. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USY6C2135110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712980d6c44ed855560fd3080bcb9cb1a9db1c00c44294a1b1e750c424715158. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USY6C2135111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcefc5efd5f9b881d4b5b1bcf61dfe97526eaddc49e4e83136e5f7b27e4ec17. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USY6C2135113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7e319e1fd1e3ed0a959f518176c4dc96f7888615a07165356e6bad7967fcbf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US58L2178401.