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 0xfea9cae42bc73135b372adfb251c6ee0dec7f27ffc0a23134b0c5a2784d9f6c9. Chain 2 (Bitcoin): anchored in block 953867 (2026-06-16T01:09:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05ad0f66-1b28-4045-b226-1c5d9b68cc73.json and https://artists.proofprofile.net/proofs/artist/05ad0f66-1b28-4045-b226-1c5d9b68cc73.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 0x38a040e06b8f170373902b9a69fdc7d2900c13a40ac092a260a45011cbd0c5af. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/MXD782201088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7784c16d8f32fa24f290d984a6190443babda0538f6cb542540b4b87c27d2627. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/MXD782203518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66240413ed021c1fdab2a8ab3097a07c0272539780215e6a4954d2cc3ee33f23. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/MXD782203519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d79eeb1fb2db49c561d469dd829bd90863c3c88bec46a5c8a5883b3038f7cd2. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/MXD782203520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abcf24350f3f8ec2a3c8d69f75d78ab1a6cc6bafb2604abfbcd39de65ebbfe1. 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/MXD782203521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdf1ab99c30ab42bb3504db9905465e0c8ac5e620d186e79815d55b558f78d1. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/MXD782203522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9db376965d4782354e0d2d148642b1262f659d67c528a36cc43daa9268a2e40. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/MXD782203523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41745562dacafcb4b446b353f9b6e70ab53db372d7c074b5c033661b9a19884c. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZTBB2385378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa6eaeb07349a283ce9fbc00a7275e8569ef64e96a22f0dad44e754e9f4ef52. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZTBB2385379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bcee3284338206e5a5b5026c6bb5c80c468a9a2c052996c538971067ae2c7d. 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/QZTBB2385380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1766f582f24e89f7fc217d4b52ab38a1068216796a9377c540dab8cc39687485. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZTBB2385382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ab2bd83506a5cc3b9be54dc45464c947b8b2f0fe01e5b979d112175feee364. 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/QZTBB2385383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fccf5f9d8cc52c39ae9adae9932f6711925cd0ed03b58618bbcffa4d2123eb1. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/MXD782202817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d85c255533e5211404e68bc8a562a1dbfc8edd02b5ed00e3102d092eca1026. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/MXD782202653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6f307472320e64e5e77f38c8111520b82456f1acc01fb9f5f2cc570200b9de. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/MXD782202819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0d3613853dff785c6f87274c2ccc31fd1aa9be4c6ff4c437f8f8f394d97b9c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/MXD782202824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4416639163936d85064bfe3dce08f8b15551eae64948130b0b1adca6d719e3f9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/MXD782202018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd34ae105059f5103a4608f5bceeaa50b350ed81365e8095182a40aaf96cdc5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/MXD782200730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb067fdad5e739ed0bb5ac1e7b4abf72d54b7e9ea78bd22a681f1a4d572662ad8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/MXD782202829.
Música de Barrio 2: El Desmadre Continúa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38f35db7c0d5a6de1e6ab36857c29c8cd187a4f181ae9f3496a1feabd668045. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNJY2332067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dec1a7e842ed7fcbfa16dd200be66b6b09512caf426cdb28ebfddd0f84f8c3d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/MXD782102581.