1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x066b06bbf22c194e174f47a4336d98b1e94234b583f8aa4e07ce4d1ca5de12d4. 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/6941edec-39df-41ce-8c91-177762fc386c.json and https://artists.proofprofile.net/proofs/artist/6941edec-39df-41ce-8c91-177762fc386c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10582d7157ff8ddf757e6b4812d5675672025a5cb6c85b472c17922b8bcf82e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/14qqSvTwm341GgaeIAvxeu.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/14qqSvTwm341GgaeIAvxeu.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725aeb2554f289eda0af5398d9bf5c2a8ee8f0f65eb5b16a7303148921f29c68. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5OHwlgB0W8jOjnrwEca1Bv.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5OHwlgB0W8jOjnrwEca1Bv.
{"copyright_id":"0x49cce59b3d6b71d43eb23dadf1c7fa61bc5d7c72c541ccde540952fcd0b67b2c","isrc":"ARF412100215","name":"Into the Great Wide Open","registered_at":"2026-06-04T13:02:26Z","spotify_id":"43smqg7uZpUHnQynnkoQxG","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cce59b3d6b71d43eb23dadf1c7fa61bc5d7c72c541ccde540952fcd0b67b2c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/43smqg7uZpUHnQynnkoQxG.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/43smqg7uZpUHnQynnkoQxG.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa70212c88cc9358847a176cae7002829f327c21d40584fbcf5ae26e55b1b470. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0TTsZIMkjeFoXeFyb10Pa6.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0TTsZIMkjeFoXeFyb10Pa6.
{"copyright_id":"0x9a4f02e333ebfeb6468197b7d63f62d94f44c936d9ad870b6aec4eb8f430afb3","isrc":"ARF411001567","name":"Ray of Light","registered_at":"2026-06-06T09:56:04Z","spotify_id":"1JTAtfjJumxIrhk7iFBqgl","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4f02e333ebfeb6468197b7d63f62d94f44c936d9ad870b6aec4eb8f430afb3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1JTAtfjJumxIrhk7iFBqgl.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1JTAtfjJumxIrhk7iFBqgl.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29fbb311cb55f59111ba3c79212f5d77355441c1f798b41cdf0ed10f7075da4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/55O6BNKILYtGnuI0HNQlN3.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/55O6BNKILYtGnuI0HNQlN3.
{"copyright_id":"0xb85b2380beacbb5df398396286c16bb7b8cb68f54f5f3f9cdeccdece899a06c0","isrc":"ARF412000030","name":"Garota de Ipanema","registered_at":"2026-06-08T19:23:31Z","spotify_id":"4vtW5itGgZRqW5GsBVHvIe","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85b2380beacbb5df398396286c16bb7b8cb68f54f5f3f9cdeccdece899a06c0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4vtW5itGgZRqW5GsBVHvIe.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4vtW5itGgZRqW5GsBVHvIe.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10582d7157ff8ddf757e6b4812d5675672025a5cb6c85b472c17922b8bcf82e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0JhQKfF8ajDUmcjJVPFU7h.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0JhQKfF8ajDUmcjJVPFU7h.
{"copyright_id":"0xe29fbb311cb55f59111ba3c79212f5d77355441c1f798b41cdf0ed10f7075da4","isrc":"ARF411100995","name":"Lady Marmalade","registered_at":"2026-06-09T09:23:23Z","spotify_id":"2YRLXfEFuNPdhf5EYDKPMG","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29fbb311cb55f59111ba3c79212f5d77355441c1f798b41cdf0ed10f7075da4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2YRLXfEFuNPdhf5EYDKPMG.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2YRLXfEFuNPdhf5EYDKPMG.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176f9d258c509d73a82eefcb95c57a3826494b74204ec0ab6072e49a8de2681b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/17msqga1el00o9B5USzSXL.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/17msqga1el00o9B5USzSXL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa70212c88cc9358847a176cae7002829f327c21d40584fbcf5ae26e55b1b470. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1wUs664GBY8sVOIscmtFXA.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1wUs664GBY8sVOIscmtFXA.
{"copyright_id":"0x725aeb2554f289eda0af5398d9bf5c2a8ee8f0f65eb5b16a7303148921f29c68","isrc":"ARF411900298","name":"Invisible Touch","registered_at":"2026-06-04T10:43:38Z","spotify_id":"03DBLoadFoEfLdtG7xotmO","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725aeb2554f289eda0af5398d9bf5c2a8ee8f0f65eb5b16a7303148921f29c68. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/03DBLoadFoEfLdtG7xotmO.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/03DBLoadFoEfLdtG7xotmO.
Vintage Café: Lounge and Jazz Blends (Special Selection), Vol. 15
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725aeb2554f289eda0af5398d9bf5c2a8ee8f0f65eb5b16a7303148921f29c68. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/427qEBYaPsO6EX88at0jSq.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/427qEBYaPsO6EX88at0jSq.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29fbb311cb55f59111ba3c79212f5d77355441c1f798b41cdf0ed10f7075da4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4e0jhEioIyu7v9yxSAsoLH.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4e0jhEioIyu7v9yxSAsoLH.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10582d7157ff8ddf757e6b4812d5675672025a5cb6c85b472c17922b8bcf82e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0W8aHJ5H92sFh4Nkf5Kofn.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0W8aHJ5H92sFh4Nkf5Kofn.
{"copyright_id":"0x49cce59b3d6b71d43eb23dadf1c7fa61bc5d7c72c541ccde540952fcd0b67b2c","isrc":"ARF412100215","name":"Into the Great Wide Open","registered_at":"2026-06-04T13:02:26Z","spotify_id":"74l2o8yZgPJYkwtHmUzeBT","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cce59b3d6b71d43eb23dadf1c7fa61bc5d7c72c541ccde540952fcd0b67b2c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/74l2o8yZgPJYkwtHmUzeBT.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/74l2o8yZgPJYkwtHmUzeBT.
Brazil - The Complete Bossa Nova Collection
{"copyright_id":"0x1be6b7464a30bb17d13b62d3dc1dec07805de86db829e62a8a0a6007f01fa5b0","isrc":"ARF412200121","name":"Grizzly Bear - Javier Penna Remix","registered_at":"2026-06-23T01:27:51Z","spotify_id":"6AqhumfrJ778GxLUbV1jXV","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be6b7464a30bb17d13b62d3dc1dec07805de86db829e62a8a0a6007f01fa5b0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6AqhumfrJ778GxLUbV1jXV.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6AqhumfrJ778GxLUbV1jXV.