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 0x33347688ee149e6a45d6df88f3c5c4825b5b4c5ca642f51af4fe0254f8e3aa91. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9ec652f-ab13-4d62-afce-ed1f539367c4.json and https://artists.proofprofile.net/proofs/artist/e9ec652f-ab13-4d62-afce-ed1f539367c4.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 0x9b2156bbe72d3ef074e0f3d59fd29327e48182f30b80a60cf204a98a09b53741. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/DKBV79800501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ab64463a9f692391676a15aab5dd2f7c990e95f0d8a8dfc956baabca9508b0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKBV79800502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478b6168d90f3553aa78af838eb8637e90f5d27a01f1bc3b3ee76e9ed07b297e. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/DKBV79800503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df7eda040a1bf69f724d566bac7d460940c54dc9e8230e2cf47190b8c06c6b8. 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/DKBV79800506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c10ec245c1d30709dcbbe9d18516e5a2dc4af77859c58c94a06bf84fff877a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKBV79800507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bcf89bffceb2d11ca1b1fb0e5e97fbbb2eb0f8896c81f237d08be23a482cc4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKBV79800508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bbcdd25b156b3104034aa8ca9900c55b7776de3c4a450aa3f5a58713ddde45. 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/DKBV79800510.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe737a2558f121a9f718f9795daf3dc5d1d021ac0eae913ea45083b1484fcd3b0. 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/DKBV79800511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c84f72668cb94e3599fd6425dd7e82d4ee1747f9ffc80ddadee0ed138354a1b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DKBV79400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd6dad0ed1145a039c32f24c3550678daf602666257f59fad8a3b8807fecf24. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/DKBV79400302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab852852c48a3b542321d9f112074e2cba9e31813a5b68f527b5a4ce05230a6. 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/DKBV78800302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f527553eb1428d4fa7752b9cc2fa25ad38dba2c944e2b10ba4bf4e9685bd74. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKBV78800301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c84f72668cb94e3599fd6425dd7e82d4ee1747f9ffc80ddadee0ed138354a1b. 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/DKBV79400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f527553eb1428d4fa7752b9cc2fa25ad38dba2c944e2b10ba4bf4e9685bd74. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DKBV78800301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab852852c48a3b542321d9f112074e2cba9e31813a5b68f527b5a4ce05230a6. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DKBV78800302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9228cff15abc8f77ba8dc1d823a9bdf43c3ebdb3ff718f1968ae250a30419a. 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/DKBV79201001.