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 0xc30b4b705578f1463a40828e3e71bc8b8011676af2d55fe9835cc78725c459e2. 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/5fca8c9f-f0b6-43ee-b89a-8414fc913ff6.json and https://artists.proofprofile.net/proofs/artist/5fca8c9f-f0b6-43ee-b89a-8414fc913ff6.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 0x7329f75a62ffea7e982a9a86dfe127b75be0f04a35886c91e3fc9d3998b0c157. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/BGA471901945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c275a8214463f82ca7f16f0278180beb3f19534fbc0a37c51da37498f2dee27. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/BGA471908279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf1e758474108257791eca601b866cb76cc200e9649c163ed7e3a6228fd34c6. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:35:19Z), 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/BGA471908281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7afe2eac5dc2a6aa22940bca6a6eb20fc876914247cfc49c0e90d09d175520. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/BGA471908282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5b9b362d8c13e209e64c6524b9d6f705a198c414592876fb2dcab3417a3b7a. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/BGA471908283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6698b1ac56714fde7331772b38ffa812995d58b90c478f618a18a9b5fbb8fee6. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/BGA471908284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd26da4a02f40d58b193682aa7ddb9a3a0854bd567d551a3e3eb92980b57ae9f. 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/BGA471908285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce29d23a61aaf103adfa39424e2fa3664bd711962825c23be07fd281f873f492. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BGA471908298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320de2c7d2c51693ca8f81dccfd25d8b36573ba9cab4efcec2313664b5319a1b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BGA471908286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eaa1c0087e4f53c026f6d82c85a8aef2f7610cb7ae83f51acb7905b64f764df. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/BGA471908287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2063761d9bd08464f667544ccbf61bff6f0ec3180293c9d8f591827fad94a214. 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/BGA471908288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02e20c3cc131f00456e58837067c3542adc9e3aab627899077cbcccf6d877eb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:57:04Z), 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/BGA471908289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314c4c62b8fdb3cde02919a4a437b3a670b33435547d6ae0e20afddb0d31d917. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/BGA471908290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6edf7f4784fd151c7fa5a292053b2a36780a26f098799af8598866d9814d58. 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/BGA471908291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72906189cf065f6dc18adc3676d2ad3d2b2a55cd5f09f809d7e7d90927b7ec03. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BGA471908292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf216da0d630dc70dc190368b7a55908d0bb7dd253e8e7905331af835342089fe. 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/BGA471908293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0b4cef0a5a5f508917ca763c563603a38222dc839da9be40eb7be887d187c7. 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/BGA471908294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f77db79f18345967ccb7965a6db02a07391e28a45a071dbf9fd38e83d51bd5. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/BGA471908295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ea80f3b2cfb5a05ada5c8354b6f117424f42af220653dc0b201a1986e0396d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BGA471908296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233b3f9643135e3c1c94988bd6a891478b73051856bb4a5ab479d7ecdb2e1c21. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/BGA471908297.
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