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 0x1177224c82e8ed9a5f3196136b56bcc65835578ae942c163fdfc2e8c2bb5cfdb. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17636508-a8f6-45c9-8212-5c6f47fe4686.json and https://artists.proofprofile.net/proofs/artist/17636508-a8f6-45c9-8212-5c6f47fe4686.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 0xf84bf65c41caebbcbe841d78d1a530716aafe47ad411863223ff71e16bee11d7. 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/PLS922350348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a4372faacf27416c05c8c2ede4ba2ef40d0004a0553aab11c168a15578257c. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/PLS922350349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24d214751da1061d70c5d154b9f50a8a3e735ded5e94ab949368d9c36cd4275. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/PLS922350350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8ecd069d78de44e3f7d806669e7c8f6eb5cabd813247150afff078bcdc87f0. 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/PLS922350351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb361499fd701f17107a7d93671f0495578ec2917ffa78b491a5df901680e0b3b. 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/PLS922350352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd39422a242e26af42eade39cb9ef2f04aea6b3c4d96d7eafcadd7b421d9a1a. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/PLS922350353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b3607cdbd84e9c9f2595ec95f59ff77e4b57622c51d4783b38f0ebcb64f75a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/PLS922350354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ebaa51f15a00f975783fc1b0b9409440c9af25b4e5e43eea636a312d445c5c. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/PLS922350355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616e08cf590f1fca7a3a2efcb4f5412fbe247ca8976e39ab6f9a30b4f42309b2. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/PLS922350356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40485df5c993c48214eed6e3ca601273f891bf6ca9ea948b89fb9d53a4b0495f. 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/PLS922350357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026ead1993d2b7ddeda1624e82d56a8231ee152f8ae9756c50ed907085d0df2a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/PLS922350358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a49d30f45e51f33696fe7d8b23816c1f4f0e545b4efb0144830b16e5f770371. 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/PLS922350359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf7132e8c6f6b0bfb14abe1f32c22b789349596cf2648db2dcb4361fdf55ebb. 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/PLS922350360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb167b998c3a38d21602871639663d2b29eecb0020776577da27f07006fa5dd. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/PLS922350361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb64d6a70db7fa313e0bdf75040cafca33d09ac6169e54921e8fef76650ba6d. 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/PLS922350362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01619a1b5fb555f2ab6ab8b906e8c70d80464546be1228b2105f11217ca708fd. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/PL9B92351258.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7a8e790cfc8b67e6f8aee9cb59086a9d535700bf6d7611da37f0f6ca582ade. 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/PL44R2114597.
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