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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 0xa06243c43ad3dc2ad8b1126ec84f10b52a72f235496c1112b25e1acc9ae90baf. 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/415cb2e1-a94e-4a51-a82a-6e52b3baf6c0.json and https://artists.proofprofile.net/proofs/artist/415cb2e1-a94e-4a51-a82a-6e52b3baf6c0.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 0x661467c3640fbcf99ac1b36d3e1fe4e6a0ed0d7fd7d10d45ed7b638208a875bc. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:59:47Z), 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/USCA20701984.
Ask Somebody Who Ain't (If You Think The System's Workin' ...)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf213ff9baadaebbf257b66c78b3bba3518f9a9c0b0992ccba02a04a0a8670616. 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/USCH39600071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b79b505b607c2718983d7d34e129c7860b6e96da480623abd1bbc2e5934975. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/USCA20701985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0fa87f73c0ffb9aaf58ef8ec816717ac282dd8518a162942464e9a58e27cbe. 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/USCH39500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d272d78a8bff22b651831316dbe74651ef9df988e4554f2b56814ccbd56854. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/USTV19900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8c7fe44a34ff79703452c43503c71604f0ba7d8a17cb1f230769e1640e8bf4. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USTV19900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a7886469fe93bb02691cded39132d7a15d466d560b09f40e00d72bc1e3138a. 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/USTV19900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa841a81a2197e789e3578188258cd44a2a42e74ee372a12ebbc97ae76b7745ce. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USTV19900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195ab25b9e4c45b307b249ab8bfa8b3ed2e6c1dc6f6399eaee8bf6a09bb1c3fa. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/USTV19900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25be994fb78a4907b796da2d50a8e5812d4a5687ec853d8d7970e567bc1779db. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USTV19900042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71bb304c3e9f49247cbad99f3ae7e4c8ed48ea7da32bc2b1e5e3f307c066964. 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/USVGB2102003.
Constantly Growing (Speech of Arrested Development, Surreal & Sojourn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd42e49bd5f60b3be2511af50418761f440e5cfdae5677cfd7763c83ed2aa16. 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/USACX0800194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f53571ae74082dff603d1ca0fa2416fda4871264c956fa1ad3cb6872cf1489. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P1116804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1932475f916a0aedf0b92c127d445afec440184c0cbe17e14df68b28921c50c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEVU51745088.