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 0x34da5c512d54d686f4c7e93689d0c081f866494b41576dbf699ee572cbd898a8. 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/af70d9b2-7586-49be-a6db-147224457f1e.json and https://artists.proofprofile.net/proofs/artist/af70d9b2-7586-49be-a6db-147224457f1e.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 0xaba93abf7b2c1c2570a290d8a78ade01ce3bd86dc9847a854d60937caaf8fa4e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR96X2140568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc786893a86e7e4cbd74acef1769aa21ffddc4484a457fe729bdc9a8b8ab8376. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR96X2133264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef44a1e04def3ed5d1f426bdba14a4aa4acd4a48d8ef23b9b67f433fad417fcc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:03:12Z), 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/FR96X2133250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda862f1af44101d8d22236145d95178813b3e889fa9f6410f098eca69938855c. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:19:10Z), 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/FRX282203239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ab79892bd04b97987826ccd8a85b6a00b3e145b70796707774c65f5ec15dff. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRX202389963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680617523e58629a9ac7355ac4be02989b0d341d83c81fd6868bc251b5d75c64. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:59:24Z), 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/FRX282436503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db1535f5cc07d363185daab79ce6afdf4d780c5bd52b45de591672f535c5401. 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/FRX282459024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981260a06ced8fc884978d8b2d7ffa1c0235d5f4478f9d2264b3e0a760b64a58. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:27:50Z), 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/FRX872436444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4467187eaa80ae5ad90184279766051473fe8b0d95cc775f260664c6c92688f4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:06:30Z), 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/DGA092411509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff5808b50ca4c74479be9fa34b5386f49954075d2a44f6be5ca78b1a205d2cb. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:04:18Z), 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/DGA0T2452635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e0519f5b4499c5386b8eccf8ffe2fcf3787f91cab5a22bafdd9a74020ff7c9. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DGA0T2453560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f6a46a9b60f2b6c2223bcc16acc8243d04ec7b243a7f3aee94dbc0110ea1a5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR2X42527553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ff285c7c94f7e9f6151ec327e7ea158839f537ea311ce96eeb9fa0a9a2809d. 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/FRX282519647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7dff96328472edeb8d5db84a80de8cbafc2f80d2e9844ba0dbf59e5d888a8b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRX452531706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957d03b9bc4ad433adc7efe238deec7fecc49c8e07c48eb7f3716c59e14005d2. 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/FRX872525426.