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 0x8815c1a213692874c7ac7806fda0acf37829be2565986bdefc16b04a8b21f14b. 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/f1900240-4ab2-4955-a01a-7d0919946ba9.json and https://artists.proofprofile.net/proofs/artist/f1900240-4ab2-4955-a01a-7d0919946ba9.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 0xb2b5e565811fa7e695f872279d055878480c806c64dd580bc1a575e09a8ad734. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/NOJ2R2009020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45591d68b569a9e5a6520e5660fdbccfab0f894dcb0ee1072885345f0e035aa0. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:59:44Z), 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/SEXCG2301301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365a2b3bc9540717acda2a886d8fc988be953963509618f3c82f4e9e7548f4c2. 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/SEXCG2301501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1147a0f509b9e5405a28b9c7d2c9b706339bfe1c3db7d711cf6db9b3d4049339. 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/SEXCG2204001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402fe0546158fc338e36bea6c722013acdcc559ed236343701e2bec4e80353b0. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/SEXCG2303101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc153600a68802d6b5e3a1bcb5db0cff1ff759f88cbbb1f00b179ca0e17eae4f8. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/SEXCG2204604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d0ad9120d8d2f69aa715afcd47aa29e9a8c25f4b5332fc575dd40bd0f4ec4d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SEXCG2201401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf85cdef788561519bbb901a585f1494bc0b4debe5db0430095793c23dd8f120. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SEXCG2201402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d22fe57d892312b848ff6a7bfa0379dddcc41c570ca944d332673ad141769ce. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/NOAGJ2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbb6ff8766ad424706c56530e9766d4b0b738fd27d1a3cad68de18c6c1e97fc. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/NOAGJ2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf695825944d4f6a491f4b6dfd546519c426ae5b737a4dd1345f5509409b77191. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:40:38Z), 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/NOAGJ2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d22fe57d892312b848ff6a7bfa0379dddcc41c570ca944d332673ad141769ce. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NOAGJ2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0058df9156dcd830bae65573d3ac0734d7c641d251144f3f68ac3f55d7a9c80. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/NOAGJ2400045.