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 0xf6b59c743eb5ab361d8a604c5b8bb186eab10193f09a1c1a003d467a7004e2ec. 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/b9026841-c72f-415e-8637-f41dd6ee0887.json and https://artists.proofprofile.net/proofs/artist/b9026841-c72f-415e-8637-f41dd6ee0887.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 0x994e99b074aa3490d64d1722bf2368628ca94b4648e9f3351e55a5c042871d50. 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/SE5Q52101907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc08b7e2143b3c8cefda635ce55fb1a21e21a6b3b0ccc849387316f42f7f843. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/SE5Q52103659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047f9fa9c36191c8e651163c1a417dde49fea9b193199fad65aaf8895b91c378. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE5Q52201792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa822d4876869e23223951516efd8415cf48263336cae3c950743c6e44b676985. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/SE5Q52203614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c6010d9b8ed68af483c493ee4814762f3b9f072f3ac6c63b6394cf41500258. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE5Q52203529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa534dd6a51b3a2a74171a0f9267eaf9a530fd5a0149bee1044a4aa4eb0958a6a. 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/SE5Q52204292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28db86c738bff286f2a5f048451c9b2eb09e64d5f811d087edef2d64524dcdef. 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/SE5Q52302036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca073ac96afe441cee5b57d07111c52bd012e20644e08fcc0e001b9e9c2d8127. 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/SE5Q52400602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6266c6c15713ccd3eb005dffd39c4a6f936de751c39befa049a3790ed60eb1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE5Q52400282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907fa2135aa5732117b8675f130d478e9756cea26c1a041db98acfa9f9c5f0d3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5Q52403013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60e1dc4db42f110d75cf07fa0e80cd26fc42682f012c91e9a443a36e2721fb7. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/SE5Q52403187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6b032f9903228b07b46a64e023153641b7b101d8ba3e7a7d65838392e10eb5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE5Q52404056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c4bd74e28fb7a1c724e9a9468d31019d94da60ef09d4ba058c1adc7be1ea6d. 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/SE5Q52500261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8af4d21547fb82c55454cb93427d7b50e9d65eb1f4ad90767a233220bbdaa7d. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE5Q52500260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2094f82a4a57b748b28200bb39d8b90a7211f5ca00f5fa3b2a29d95837d642. 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/SE5Q52500582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c830b8e71757e03887d3e5118f8ffb4c1557ab088557d21219db4d3c87a569. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SE5Q52501201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67ffde5016029d4ec98a55370e2642dbdfa57d170b1aa8755ed18d9f39e704d. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/SE5Q52501202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17a43d216d6051bc48d93473419f33ffd2d2d1005ff718adbfa6e7122d65e27. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE5Q52502117.