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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8253a6ade190aed79388a6ba1a4cb8519d527345d776112cfc17fba4001d5c9c. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6885153b-91ca-4f36-ac60-ff741a1121c7.json and https://artists.proofprofile.net/proofs/artist/6885153b-91ca-4f36-ac60-ff741a1121c7.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe2a62f98c8941862ee251d099bdfafe997f93c046bd097746f4aa08739add7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAGA2295335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357d8b681ea9a62e99648e27446a4e1856df03120cdb53e2d209d7ff38b76d62. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAGA2295354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3491ff02a16f98908370194d96ab7a94f5a3035e83cdcd37de7c1a021466f594. 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/TCAGA2295357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfd5cfe8b95599a7ee87e39846dd0100b1638113754c36472412c4ee58b1fe4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAGA2295366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e5d714c34bfbcdb264061e39f9336b49591067af149fdeafc005989fddc199. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCAGA2295340.
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 0x84bab08aad7382691b2bf1e3863244faa78301b94b3ebb3cccf35c0b5f6dcadf. 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/TCAGA2295093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622eb8af331179d0df0e7cf905c5f308abea5141c0d868a8e75b1cf7eb54f70a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAGA2295210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9270cef6b54260686ca94f73e87ab72981d405e1449672cfd24d165686aefc4e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAGA2295233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a3fbe667d9fe09dfc83b132b0a304bd538348f4669f0c062543147c6a696ad. 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/TCAGA2295261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e320cd54b27de94efb690b80a780fb343b32444007117ea5472a2bfc0e8ef20. 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/TCAGA2295264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fc5006867042915d9c0e38968b9463700d4d25ba7bcf98b594b955e8754c39. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAGA2295270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166a7587fa30c1d515b89948d57b0ce92d69a3d3bda4816c92f495d7b7079b3a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAGA2295275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086b617710b97c91bb5366b87c17edc8cb00e0e92e987b2afa9a02628f60a289. 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/TCAGA2295279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19b97e80a8f2af5972df13f6ff4702711f0dedeed1b0275ebe939fb4e5462b1. 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/TCAGA2295281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca15c9f5bf8240b30de46b5bd6825848c59a4dbbfa722074930d446afc25f6b. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TCAGA2295116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b695f708fc621c306ffc9a7a569713f0c75c91dae405d0c8e23ec35ce06e54. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/TCAGA2295225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e96da33bae6fe27d50fc8df1b40035e58f5390030be73f95dcdd596fa95d2ea. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCAGA2295228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d5373b96cdb220861d0888dd26cb348b6462fc527b23b9fb822e30d9f55538. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TCAGA2295243.