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 0xeab4d727160eb999b7f3dda7a7835d88b3a1dfd5c2b976a8f1d476bcca931732. 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/7ac9265e-c6e2-47c5-8e31-04c6184a4bfe.json and https://artists.proofprofile.net/proofs/artist/7ac9265e-c6e2-47c5-8e31-04c6184a4bfe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0xe8e4546dc7ebed56dee328c9f6672cd79a3f253955336ceaa8441c747eb4f4ed","isrc":"USAT20902287","name":"Green Onions","registered_at":"2026-06-04T05:42:06Z","spotify_id":"6KKcey1w86oP0qxN8frbfD","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 0xe8e4546dc7ebed56dee328c9f6672cd79a3f253955336ceaa8441c747eb4f4ed. 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/6KKcey1w86oP0qxN8frbfD.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/6KKcey1w86oP0qxN8frbfD.
Live at the Monterey International Pop Festival
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86401242087e939029a1cdd21b7507ef62ac5607c64b4fbe45d327a746cb56e5. 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/1pVaFVuoK8r8G0QPgeIDAW.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/1pVaFVuoK8r8G0QPgeIDAW.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145cdc6df6dbbf7624ce0992123e72bc555d933c9f1d848d5bb1bc24624d5f59. 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/2fhLSpE7wlrqdt3Yi0W0Vd.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/2fhLSpE7wlrqdt3Yi0W0Vd.
{"copyright_id":"0x5e4322a6f94d35e09c1faced7836f6ee2f9fbd35ea5e3c9e51e7b0cad229f036","isrc":"QM4TW1949589","name":"Philly Dog","registered_at":"2026-06-18T23:53:39Z","spotify_id":"1cHIHTExDFGCg66uRwPeF4","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4322a6f94d35e09c1faced7836f6ee2f9fbd35ea5e3c9e51e7b0cad229f036. 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/1cHIHTExDFGCg66uRwPeF4.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/1cHIHTExDFGCg66uRwPeF4.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0ba01531f428fb4ec49531005b11b915f7c25461067d657e654a738a66b29a. 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/7CPqMAfDsXexc1SD5y5VgC.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/7CPqMAfDsXexc1SD5y5VgC.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1644c0d42f20d53a6fc2957b818a09803dbd637dce70f5ae117ff3ede758c829. 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/6oAwx9zE04MsMcfLVNvp2g.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/6oAwx9zE04MsMcfLVNvp2g.
I've Been Loving You Too Long (To Stop Now)
{"copyright_id":"0xa317b7508ba8efd7ca60b22281c3579b8c99bc97bee166743135e94964a3e73a","isrc":"QM4TW1949592","name":"I've Been Loving You Too Long (To Stop Now)","registered_at":"2026-06-08T07:31:59Z","spotify_id":"0FirKNAWeS1qKO49WEgSag","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa317b7508ba8efd7ca60b22281c3579b8c99bc97bee166743135e94964a3e73a. 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/0FirKNAWeS1qKO49WEgSag.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/0FirKNAWeS1qKO49WEgSag.
{"copyright_id":"0xe03f709d0763d0dbffcfb056704a2644c0e30cfe54fc7e496c50b885181577de","isrc":"QM4TW1949593","name":"(I Can't Get No) Satisfaction","registered_at":"2026-06-18T23:50:53Z","spotify_id":"1vcoWGUxHPVcXTAgLZblXP","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03f709d0763d0dbffcfb056704a2644c0e30cfe54fc7e496c50b885181577de. 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/1vcoWGUxHPVcXTAgLZblXP.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/1vcoWGUxHPVcXTAgLZblXP.
{"copyright_id":"0xf0dcf23d14f20cf6ac2639003ce2e1bf5dac0a6507ea412831ab2eacd65347e1","isrc":"QM4TW1949594","name":"Try a Little Tenderness","registered_at":"2026-06-10T09:42:03Z","spotify_id":"7B4paW1JjzKgvsNT4Vy3Kn","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0dcf23d14f20cf6ac2639003ce2e1bf5dac0a6507ea412831ab2eacd65347e1. 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/7B4paW1JjzKgvsNT4Vy3Kn.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/7B4paW1JjzKgvsNT4Vy3Kn.
The Vietnam War - A Film By Ken Burns & Lynn Novick (The Soundtrack)
{"copyright_id":"0xe3e6ed4ef4387820da755da8a0ddb0bd56c2af444d9785479c1039d8a286ce18","isrc":"USAT20000736","name":"Green Onions","registered_at":"2026-06-01T05:46:50Z","spotify_id":"4fQMGlCawbTkH9yPPZ49kP","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e6ed4ef4387820da755da8a0ddb0bd56c2af444d9785479c1039d8a286ce18. 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/4fQMGlCawbTkH9yPPZ49kP.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/4fQMGlCawbTkH9yPPZ49kP.
{"copyright_id":"0xe3e6ed4ef4387820da755da8a0ddb0bd56c2af444d9785479c1039d8a286ce18","isrc":"USAT20000736","name":"Green Onions","registered_at":"2026-06-01T05:46:49Z","spotify_id":"1ZjCYYikQJDi3mEzFB2X3J","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e6ed4ef4387820da755da8a0ddb0bd56c2af444d9785479c1039d8a286ce18. 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/1ZjCYYikQJDi3mEzFB2X3J.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/1ZjCYYikQJDi3mEzFB2X3J.
{"copyright_id":"0xe3e6ed4ef4387820da755da8a0ddb0bd56c2af444d9785479c1039d8a286ce18","isrc":"USAT20000736","name":"Green Onions","registered_at":"2026-06-01T05:46:49Z","spotify_id":"6RHiSpyWeD7Y5vxKvSkIh4","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e6ed4ef4387820da755da8a0ddb0bd56c2af444d9785479c1039d8a286ce18. 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/6RHiSpyWeD7Y5vxKvSkIh4.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/6RHiSpyWeD7Y5vxKvSkIh4.
Legend (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e6ed4ef4387820da755da8a0ddb0bd56c2af444d9785479c1039d8a286ce18. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/15tppzhAP9jBx0mHHVMhN1.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/15tppzhAP9jBx0mHHVMhN1.
{"copyright_id":"0xe3e6ed4ef4387820da755da8a0ddb0bd56c2af444d9785479c1039d8a286ce18","isrc":"USAT20000736","name":"Green Onions","registered_at":"2026-06-01T05:46:50Z","spotify_id":"4snQmr9gMkm8rJMl9BjXbl","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e6ed4ef4387820da755da8a0ddb0bd56c2af444d9785479c1039d8a286ce18. 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/4snQmr9gMkm8rJMl9BjXbl.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/4snQmr9gMkm8rJMl9BjXbl.
Cosmo's Factory (40th Anniversary Edition)