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 0xda02efc85b5e75789d4bcc4c756f7c356a6c74b11c1f3b96e1dbd8b78065d5e0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f0b2fc3-e1e0-44b9-ba93-7219ed023d32.json and https://artists.proofprofile.net/proofs/artist/5f0b2fc3-e1e0-44b9-ba93-7219ed023d32.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0xac50d8a453fc8225df9bc85ad9de5c0c691ad333c683f6faa3650f97f8a6361e","isrc":"FRZ132407070","name":"Roni's Swing","registered_at":"2026-06-08T01:17:05Z","spotify_id":"7o1D6of9CprXWZEYJlyneL","type":"track"}
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 0xac50d8a453fc8225df9bc85ad9de5c0c691ad333c683f6faa3650f97f8a6361e. 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/7o1D6of9CprXWZEYJlyneL.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/7o1D6of9CprXWZEYJlyneL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e081bc98aed046ebbfed10bcf5cdc4ac6202661e358beef70ef218d3b307b6. 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/2i6pMDJd8lcKpD6gOOnEsl.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/2i6pMDJd8lcKpD6gOOnEsl.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e72401ad7c39a2b5903769efe3d248d4302b2f34c636c2fe765f59b5bd209d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6Oclj8mALO4Qt1apY6X37T.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/6Oclj8mALO4Qt1apY6X37T.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe0940375676334f20afd9ea775b85946450228ebec4828e4b0708fa0dda2de. 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/5RsfLo7wle8qYr90o7pPoT.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/5RsfLo7wle8qYr90o7pPoT.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e35da41b59b613fb7774dae8f8f9226cab215d170763449f192342998876a88. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/28Ww05n8SiqLPBvOgka089.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/28Ww05n8SiqLPBvOgka089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ced4b61fd8f310ce8e437bcd670a77ed3c621a73326e402ed4a7c1dc5fc2f8. 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/27sWE4ycxCXtu368xBURIp.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/27sWE4ycxCXtu368xBURIp.
{"copyright_id":"0xa748cee57f05b5ac1bb6d838d2a6975433f45e960b7dbe14ee548005d18cee0d","isrc":"JP92N2499201","name":"LITTLE CRADLE SONG","registered_at":"2026-06-23T03:57:59Z","spotify_id":"2WEvNi1V0tmTUzNnSddhBC","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa748cee57f05b5ac1bb6d838d2a6975433f45e960b7dbe14ee548005d18cee0d. 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/2WEvNi1V0tmTUzNnSddhBC.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/2WEvNi1V0tmTUzNnSddhBC.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f75560ffa91ac0d28693beead0c89363870e47e33ec26426fd0f7e2a3f863a6. 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/5OeA8cmoLyxC1w3eCUuYgl.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/5OeA8cmoLyxC1w3eCUuYgl.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2a484e9a7a8d65bfc516ab791e525f30f0c18d345bbe54df64eaa129162abe. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2Th3UdOe8hXvfG0t4OfZUK.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/2Th3UdOe8hXvfG0t4OfZUK.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa087c9548b452f3b5a1a44e42ab1ca6f66df24fb11708738894178fa301b3b0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4bRwNtfKmSSkp0kEalEtOX.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/4bRwNtfKmSSkp0kEalEtOX.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e081bc98aed046ebbfed10bcf5cdc4ac6202661e358beef70ef218d3b307b6. 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/3sMaTKZQft9ZFboRvbxiyZ.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/3sMaTKZQft9ZFboRvbxiyZ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c6aa1b43aa4e740cb1708a4aa248719217607797ee28e518c90f6d16d237a6. 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/0OQlKvIGtojOXh2ktXWmKH.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/0OQlKvIGtojOXh2ktXWmKH.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30ce3d83b2a2360e1fc904f70f333c1a0886476e4b30b25606e246472ae2c58. 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/347Fpu96gIJPsNrAO2bj9g.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/347Fpu96gIJPsNrAO2bj9g.
{"copyright_id":"0xa80094bf149b314336ffde23bef7b644a2427f80d1a393c46c213e03b942e663","isrc":"FRZ132407040","name":"The Ever And Ever Evolving Etude","registered_at":"2026-06-06T19:42:37Z","spotify_id":"5udUmC6ebgA1KOE7ayBE3v","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80094bf149b314336ffde23bef7b644a2427f80d1a393c46c213e03b942e663. 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/5udUmC6ebgA1KOE7ayBE3v.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/5udUmC6ebgA1KOE7ayBE3v.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d9ffa0e6d87759f1dd7198b61b749f78fe5b29564a9e372d675ecb34977c0e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3PeQ6xF55VuPUvv6VZWvA9.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/3PeQ6xF55VuPUvv6VZWvA9.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03dff3843ccd4d8f9f9ddcadcade32521eb6dc7282abc40e0b32041635bdea1b. 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/6TOv8qekyIM8wgBP3LaZzp.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/6TOv8qekyIM8wgBP3LaZzp.
{"copyright_id":"0xac50d8a453fc8225df9bc85ad9de5c0c691ad333c683f6faa3650f97f8a6361e","isrc":"FRZ132407070","name":"Roni's Swing","registered_at":"2026-06-08T01:17:05Z","spotify_id":"397jwYKhwJpf9SjEikkskL","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac50d8a453fc8225df9bc85ad9de5c0c691ad333c683f6faa3650f97f8a6361e. 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/397jwYKhwJpf9SjEikkskL.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/397jwYKhwJpf9SjEikkskL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b788f43c32d2d007fa2e3d1eebcbc54fbb3c298958ec8c1a3445dc2bad6548. 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/63fJV1XEOzZysMgMjJHU6g.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/63fJV1XEOzZysMgMjJHU6g.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe829ba4a2c6af029933934aac357ede966c13d3f51086c6d96a746f282c660fb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6zrSbsnw0TRst3mGBEZ207.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/6zrSbsnw0TRst3mGBEZ207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dea61ec24d7b21ebcd96a54073166e34b244178ad0b28cd8bb5029264f00975. 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/4B5mtPTsJ2WRr0Na8TyWMf.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/4B5mtPTsJ2WRr0Na8TyWMf.