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 0xc2f13744347e43d2eaeed181d42ee1be0f09fe6d676a7f32645a63455fddf8c3. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81adaa2a-8394-4e46-b139-1ec0de5aecff.json and https://artists.proofprofile.net/proofs/artist/81adaa2a-8394-4e46-b139-1ec0de5aecff.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 0xeab887969e8789ac8aa90d8accd784fb8091faf35b08fee384acb48542bc73f7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USL4R2425444.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22cf1857a06f46ba3bf16d071273c3f430524b63c819670d98913f801a9b27a. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:59:28Z), 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/QT3TB2417836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52310baa8695fd330754c4eac36336ec1beb6f614e7066bc8148e5c554ab1705. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCGH2549684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f9dbba09229b29bdbc5c210fc90dcf703240148984743d04845dd049a7e34b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USHM92554281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bacf76f420b472255945dabbf314d8081af78b8c0c2efe9d85c3688f03c9792. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/USHM92554282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883a8e8ecab929bc43b1c73697f87cda5769338beefa9e523d45eebd401b02a0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM92554283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a43ba337fedb020e8d238a1b56b1adcfa18e54c072b5d42a363b92ab596ba65. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USHM92554284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a78291c0e2f239156092321d494e09e4f40cb5d7e9931368b495920ce2b25dc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM92554285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecf1b07e29dcfd7e72470814e8cf4f50356da88f4a1f1c4f37a1624f50e8725. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USL4Q2564545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917dfecc4bb3b3acdfd51e18db716001984fcce00bebb76c20f2286c48094fe5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USL4Q2564546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd607d4bad868908196553d3988b7c0473141c727640dffc3b478e0d01b0aafb4. 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/USL4Q2564547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8030025d24ee5cbff4cd8561baf241d9b7ca5350c50568ded6fe18f0bd448792. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USL4Q2564548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaf2cf6e47b984ed346a9089a86a47e585196b64dae7cff21bf3e3e16ca563f. 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/USL4R2586704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbff045ff338f78cb54d0e7c030cbb0fad4d04b207dcd90908fdbefb11a5c69. 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/USL4R2586705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0e73f07794d832e042433c3caf0538f6dfe9fce2a73cc9dfbdca91797ac71f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:33:37Z), 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/USL4R2586706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62aad73ab67a3f911e166fac4491940e052771bc8576f56e18006cb8ca3c2039. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:33:10Z), 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/USL4R2586707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81154501443526960647cda61c9d57f335e48425ec934bfefbc465c670879ba7. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USL4R2586708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cfd02cc4b37fa5ac2a4347d54012f3250530a0a465fb902ed8873632e92626. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USL4R2586709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1f0f54b22b61de1f468a58b6d3a008fe880a6b691313a4e7defb0689667319. 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/USL4R2586710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e52882df1bfb83acf25c61da1c165114d6fec680a043bd39a23aa0aab076275. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:43:10Z), 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/USL4R2586712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1db6b2ff1066a7a7fcf27ea2585e50ac3b2ecb8610947a0652ff86c2ea10136. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USL4R2586713.