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 0x503af2851b6a6a08e345e637fd39a419a50b5a3639176a08efe6ceef10424544. 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/fa54dadc-e9d9-4f98-bdac-ddf20eb3a5ca.json and https://artists.proofprofile.net/proofs/artist/fa54dadc-e9d9-4f98-bdac-ddf20eb3a5ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
SSS AAA DDD ... (2021 Remastered Version)
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 0xb239a373ffe5314f7d1a9096904a0298e5294b42074ef7874dcc498d99362ad9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/SE5752303836.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ecb3b2600106ad30feee47624044bd67ba84e495b22b9ab4d70195dc4e662f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE5BU2417866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe41b80ca180787b6844709047f66d35d8aae2e51777e4b053f6b55566948f2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE5BU2471198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee8883e35ab3997baadfa5747e7fe664a2c6ff5ca2d07d55d41cb986ca9b573. 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/NL5UZ2403939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad7a7cc073f319209fba2cb022b089777e37df148f664d16b7f7ade0b8e1b81. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NL5UZ2404403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912084740664df1fcf0e33f9e0564877473d45a023381c9d2a192597cb615603. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USDY42426741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed4480e92c3368bd4902cd36d9d1761a0bf3004347b8f2e31362e525468a40c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NL5UZ2406904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35962c790eb1d9212f954727bd4762ff3e93f67d7fc3550f40e8cf48a3ec0a28. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NL5UZ2408529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1dd6a1c468a2e6b528969571df5710228ffdae4fd048c5899fccd74e0c43c3. 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/NL5UZ2408530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c638d1065e6ac9dfad175731bc4c262e137567774c1d457e505163e2c61bb8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZWFV2472178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ffed370285590b2c92b0fe5dbbe8d371daad504ae17201bd0213dfbb996e81. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7L2438444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63cd4aa068a12d0719714d249984244a0affde86159eb01e065edee417a4f8d. 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/QZVEM1867985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17817a5773b0138c093146b4223b0c8202db8482c1975923ca6ccb14257c9ac7. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZPEW2501959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c86785698e1da877adca06523ab856ba4f797c6a1b4074eda278749b3eeb9ad. 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/QZVEM1882929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9bca041dc669701b8812b9d8d3693ad84e3d5241a60f5eea32f8d51399a269. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZPEW2501960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d96fab83a3f7ad54365779ed2d938c1dbf5ad5f742dd6f9abd7e6cc4f793da. 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/NL5UZ2504055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09ed0640baa4863f1fb50844d93fcae6c961684af02c91a0e302cec98427dd8. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZVEM2553219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c940b1cb68655b11b308f1493ac3e896d612f3cbcd36b49300c5d1c8dfbc57. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GXESV2571922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc4580effeb56d7c1a1b675801aa5d58393f33548ac6eaade50ae19b8f58905. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NL5UZ2517876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004b7f6419640b6a7a16d7f2766998998d90a15a2255fe64d841432f1add24ec. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/NL5UZ2515083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1351fb12767ab917caa4b70ebc355b2c9340bbdbe0eaaa48eca7abfd309fc5a4. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/CA5KR2587682.