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 0x26f09fabc2385650362a7331bee622cc16c4b80ad0fce2ef3fd98ad08c3ece0a. 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/53fd70cb-d458-43ee-94e5-3f5082008464.json and https://artists.proofprofile.net/proofs/artist/53fd70cb-d458-43ee-94e5-3f5082008464.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Where Or When: Babes in Arms: My Funny Valentine
Autumn Leaves: Les feuilles mortes (Autumn Leaves)
My Funny Valentine: Babes in Arms: My Funny Valentine
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 0xb11c289b0a53283592268e5d8bffd6cc186a1543b61bed94569f9235a5a97b2d. 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/3f3hT4I98nzIeqijasHcud.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/3f3hT4I98nzIeqijasHcud.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3569c9647033346c4bfb0aa042b0b32b183bc8b635fabb6f3e27bfb8369213d. 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/6521hcLRlw2XeqgODo5ZQl.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/6521hcLRlw2XeqgODo5ZQl.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb1d399b101e80b7b9b03600587b9eea044900b6817dc9708eeb69263ceacd4. 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/69safpm8SnZkhNZuy6SClk.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/69safpm8SnZkhNZuy6SClk.
{"copyright_id":"0x5b037fdd5eb6f063fa2ce3c6ad842d91da19b9cbe50f07c42a5919ef9ce52751","isrc":"ARF411101415","name":"We Are Family - Midnight Vibes Mix","registered_at":"2026-06-07T15:51:35Z","spotify_id":"4co3jueb8z6DDC3oro865S","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b037fdd5eb6f063fa2ce3c6ad842d91da19b9cbe50f07c42a5919ef9ce52751. 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/4co3jueb8z6DDC3oro865S.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/4co3jueb8z6DDC3oro865S.
{"copyright_id":"0xb3569c9647033346c4bfb0aa042b0b32b183bc8b635fabb6f3e27bfb8369213d","isrc":"ARF411100993","name":"We Are Family","registered_at":"2026-06-05T15:31:41Z","spotify_id":"6WhHi2QPMEqgCniPmoTGTS","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3569c9647033346c4bfb0aa042b0b32b183bc8b635fabb6f3e27bfb8369213d. 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/6WhHi2QPMEqgCniPmoTGTS.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/6WhHi2QPMEqgCniPmoTGTS.
{"copyright_id":"0x9d83768c7d91ba30758abbcc49a9da0f99906b817cbd4fc1fad0e6762d4f26ed","isrc":"ARF411001009","name":"Day Tripper","registered_at":"2026-06-07T01:02:54Z","spotify_id":"1FXHTivb4oHFjtjyAqxPse","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d83768c7d91ba30758abbcc49a9da0f99906b817cbd4fc1fad0e6762d4f26ed. 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/1FXHTivb4oHFjtjyAqxPse.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/1FXHTivb4oHFjtjyAqxPse.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb1d399b101e80b7b9b03600587b9eea044900b6817dc9708eeb69263ceacd4. 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/2P3I98Bo7GgVCsjxuXffJM.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/2P3I98Bo7GgVCsjxuXffJM.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11c289b0a53283592268e5d8bffd6cc186a1543b61bed94569f9235a5a97b2d. 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/0YjVqLASHxsWHuGW6DlnLs.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/0YjVqLASHxsWHuGW6DlnLs.
{"copyright_id":"0x5b037fdd5eb6f063fa2ce3c6ad842d91da19b9cbe50f07c42a5919ef9ce52751","isrc":"ARF411101415","name":"We Are Family - Midnight Vibes Mix","registered_at":"2026-06-07T15:51:35Z","spotify_id":"7ompRHisncghhmc7eAGW4r","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b037fdd5eb6f063fa2ce3c6ad842d91da19b9cbe50f07c42a5919ef9ce52751. 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/7ompRHisncghhmc7eAGW4r.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/7ompRHisncghhmc7eAGW4r.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70181451aaeeefb39ce118bf1d2f38f3bec3ca4773a4017bf1b4727745a06f9. 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/4WQMTTfZwAjdpOPdHoLJsO.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/4WQMTTfZwAjdpOPdHoLJsO.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70181451aaeeefb39ce118bf1d2f38f3bec3ca4773a4017bf1b4727745a06f9. 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/2D3SekktUSoXG47yn8OlXo.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/2D3SekktUSoXG47yn8OlXo.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11c289b0a53283592268e5d8bffd6cc186a1543b61bed94569f9235a5a97b2d. 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/66s3pz23pwVvmOeuXpAIak.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/66s3pz23pwVvmOeuXpAIak.
{"copyright_id":"0x9d83768c7d91ba30758abbcc49a9da0f99906b817cbd4fc1fad0e6762d4f26ed","isrc":"ARF411001009","name":"Day Tripper","registered_at":"2026-06-07T01:02:54Z","spotify_id":"4swJHiY4hGIi3UD7ZfBJ6N","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d83768c7d91ba30758abbcc49a9da0f99906b817cbd4fc1fad0e6762d4f26ed. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T20:34:01Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4swJHiY4hGIi3UD7ZfBJ6N.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/4swJHiY4hGIi3UD7ZfBJ6N.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11c289b0a53283592268e5d8bffd6cc186a1543b61bed94569f9235a5a97b2d. 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/7lxuz5pWY8awzqSth03gl8.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/7lxuz5pWY8awzqSth03gl8.
{"copyright_id":"0x3d49c55e6dbf2f5a63e6d87ba320f32722bcf8cee40905516dcef234b9f8ea57","isrc":"ARF411200389","name":"Get Back","registered_at":"2026-06-07T13:52:14Z","spotify_id":"7BFjqMWaT1hblDUyeQY0re","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d49c55e6dbf2f5a63e6d87ba320f32722bcf8cee40905516dcef234b9f8ea57. 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/7BFjqMWaT1hblDUyeQY0re.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/7BFjqMWaT1hblDUyeQY0re.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3569c9647033346c4bfb0aa042b0b32b183bc8b635fabb6f3e27bfb8369213d. 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/7ALRmA06sBu0OiMMhyEvvE.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/7ALRmA06sBu0OiMMhyEvvE.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3eeecdfcf95b893339af930428694b8abe2b26be9a52f06317048394864cb6. 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/3v9bR62Ri9EJpCcQy5KMil.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/3v9bR62Ri9EJpCcQy5KMil.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70181451aaeeefb39ce118bf1d2f38f3bec3ca4773a4017bf1b4727745a06f9. 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/1zf94Y8ujWLUjBWQtCzVNx.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/1zf94Y8ujWLUjBWQtCzVNx.