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 0x5c4c2a881bfb7443c72856f1d27c8a0fd8d9ead08dbcaf3cb014735c83f6ca92. 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/6a82a247-e805-4ed3-afa8-b22d3a176ca5.json and https://artists.proofprofile.net/proofs/artist/6a82a247-e805-4ed3-afa8-b22d3a176ca5.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 0x2e60319333b7924203f4c0d186376900d80d362f83e40870c3d65eb92c714bf4. 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/7gzbnBiHnGBpruEIWTSh1X.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/7gzbnBiHnGBpruEIWTSh1X.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe384d359a8e969602f0de628ab10f41010cd3c57339d930f29f34cfe23801480. 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/3OXc6xDxasnl4uj2jl1q4Y.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/3OXc6xDxasnl4uj2jl1q4Y.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168d05d15f57d9e788d7661db71b571c76ab18a1cdd131b7f2771233c1062e04. 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/3fkPMWQ6cBNBLuFcPyMS8s.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/3fkPMWQ6cBNBLuFcPyMS8s.
{"copyright_id":"0x17df7520f3fac8c91cc3b8e21884c045f3879585c3633f711d9a2e597809c775","isrc":"USSM10017653","name":"Veteran of the Psychic Wars","registered_at":"2026-06-04T10:16:05Z","spotify_id":"1bPUK3zBMK73QXmCLzqffn","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17df7520f3fac8c91cc3b8e21884c045f3879585c3633f711d9a2e597809c775. 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/1bPUK3zBMK73QXmCLzqffn.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/1bPUK3zBMK73QXmCLzqffn.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2704d8bd74d2cc0f36b4762bb2b1a1075bb3f1dc8a35e44699e084865c500d90. 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/2PicnFqnuKd9EwHp2xQvcn.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/2PicnFqnuKd9EwHp2xQvcn.
{"copyright_id":"0x2363d1e7dcfb26e4f7541eeeeda68b22a738e30c78cf24c81ef7a50010132f3a","isrc":"USSM10017655","name":"Heavy Metal: The Black and Silver","registered_at":"2026-06-06T08:57:59Z","spotify_id":"1uUCpOX86yRGShambUp93O","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2363d1e7dcfb26e4f7541eeeeda68b22a738e30c78cf24c81ef7a50010132f3a. 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/1uUCpOX86yRGShambUp93O.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/1uUCpOX86yRGShambUp93O.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c797e859b74d753703416d4e1b59a48291a97af906cd44929f0bf4954ea8513. 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/1npDAUsFkVkq4Sw1jnP0Ap.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/1npDAUsFkVkq4Sw1jnP0Ap.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa610e68e3b13bc181e07da37077d2d8a851c7f42789340b63770da170212a76d. 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/29PUsW4uzZI39YffXGKlUw.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/29PUsW4uzZI39YffXGKlUw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aca7fc865d0c27b3f8c8abc248710d67f83d3e9b26339ce237738ad7d93dc32. 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/0DcEV14d8zZykcFQ6PI2KQ.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/0DcEV14d8zZykcFQ6PI2KQ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3468cb6dbe7bf737896fb8409e1007fdab4b561289ff7cbd63a132dc1f321a58. 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/4ap7H3FJId8l90bsM2rPYr.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/4ap7H3FJId8l90bsM2rPYr.
{"copyright_id":"0xa535e099587a890a78566f3f9cda91bf9d3f034f5daa64ccf1717b0054ddb571","isrc":"USSM17100736","name":"Cities On Flame with Rock and Roll","registered_at":"2026-06-04T06:33:30Z","spotify_id":"0M7oqERflkrJVHD3IAZqxo","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa535e099587a890a78566f3f9cda91bf9d3f034f5daa64ccf1717b0054ddb571. 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/0M7oqERflkrJVHD3IAZqxo.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/0M7oqERflkrJVHD3IAZqxo.
{"copyright_id":"0xd3e1f804f278e921028a1dabfb0b868793e9d77479f711f36bbbf802daa8a0d9","isrc":"USSM17600477","name":"(Don't Fear) The Reaper","registered_at":"2026-06-17T09:00:04Z","spotify_id":"51luEfTtidxJICE0bWLc78","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e1f804f278e921028a1dabfb0b868793e9d77479f711f36bbbf802daa8a0d9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/51luEfTtidxJICE0bWLc78.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/51luEfTtidxJICE0bWLc78.
Haynes Ultimate Guide to Classic Anthems
(Don't Fear) The Reaper - Single Version
{"copyright_id":"0x9bb47c22ac80de730eb07c8b3cb164f72bf61b02b3387ff2bb3b296385b45de3","isrc":"USSM17600875","name":"(Don't Fear) The Reaper - Single Version","registered_at":"2026-06-04T15:01:47Z","spotify_id":"3CpDovw3ZHiviTembCAdMz","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb47c22ac80de730eb07c8b3cb164f72bf61b02b3387ff2bb3b296385b45de3. 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/3CpDovw3ZHiviTembCAdMz.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/3CpDovw3ZHiviTembCAdMz.
{"copyright_id":"0x9bb47c22ac80de730eb07c8b3cb164f72bf61b02b3387ff2bb3b296385b45de3","isrc":"USSM17600875","name":"(Don't Fear) The Reaper - Single Version","registered_at":"2026-06-04T15:01:47Z","spotify_id":"5LUh0sfYlGGCdSLvCdIoKi","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb47c22ac80de730eb07c8b3cb164f72bf61b02b3387ff2bb3b296385b45de3. 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/5LUh0sfYlGGCdSLvCdIoKi.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/5LUh0sfYlGGCdSLvCdIoKi.
{"copyright_id":"0x9bb47c22ac80de730eb07c8b3cb164f72bf61b02b3387ff2bb3b296385b45de3","isrc":"USSM17600875","name":"(Don't Fear) The Reaper - Single Version","registered_at":"2026-06-04T15:01:47Z","spotify_id":"6nXlrZryIeqgQZzw0ecgKY","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb47c22ac80de730eb07c8b3cb164f72bf61b02b3387ff2bb3b296385b45de3. 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/6nXlrZryIeqgQZzw0ecgKY.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/6nXlrZryIeqgQZzw0ecgKY.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168d05d15f57d9e788d7661db71b571c76ab18a1cdd131b7f2771233c1062e04. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2TYXdcMfgjBI3syMuWv1Kl.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/2TYXdcMfgjBI3syMuWv1Kl.