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 0x208d3cff0e80f0c6750ba4a93e192e86b1fd47c844f44c31f28958a09219a4c3. 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/dc1031bb-bc22-4b9d-b5c2-9d8432a86413.json and https://artists.proofprofile.net/proofs/artist/dc1031bb-bc22-4b9d-b5c2-9d8432a86413.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0xd797dc4099e0663241d133be7c6a06f346acf9156fec485d70a076110840c07b","isrc":"DEN962232407","name":"Gigue 6.6 - Summer Tales Arrangement","registered_at":"2026-06-09T05:58:43Z","spotify_id":"4rpVD2wDsPiLYFIFhpvIj3","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 0xd797dc4099e0663241d133be7c6a06f346acf9156fec485d70a076110840c07b. 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/4rpVD2wDsPiLYFIFhpvIj3.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/4rpVD2wDsPiLYFIFhpvIj3.
The Echoes of Women - International Women's Day 2024
{"copyright_id":"0xf91ff38d5a658ce6022eaaa7523162c79825d800012783a27498e6f8942d0d1d","isrc":"DEN962102900","name":"White Flowers Take Their Bath","registered_at":"2026-06-09T15:42:27Z","spotify_id":"5noOiloFrEgff2DTdGaOwm","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91ff38d5a658ce6022eaaa7523162c79825d800012783a27498e6f8942d0d1d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5noOiloFrEgff2DTdGaOwm.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/5noOiloFrEgff2DTdGaOwm.
Holst: In The Bleak Midwinter (Arr. Amy Crankshaw for Solo Cello and Strings)
{"copyright_id":"0xf91ff38d5a658ce6022eaaa7523162c79825d800012783a27498e6f8942d0d1d","isrc":"DEN962102900","name":"White Flowers Take Their Bath","registered_at":"2026-06-09T15:42:27Z","spotify_id":"0n3HaBsGQ1LwtFMpfOqAWI","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91ff38d5a658ce6022eaaa7523162c79825d800012783a27498e6f8942d0d1d. 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/0n3HaBsGQ1LwtFMpfOqAWI.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/0n3HaBsGQ1LwtFMpfOqAWI.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efb040b921578a24dc930df9a9ff770ef52f0a187cb919ee54da632cd718e4b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T20:26:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6uGqGgYfQRpFIoR4Ko4LJU.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/6uGqGgYfQRpFIoR4Ko4LJU.
{"copyright_id":"0x6a8a39d22d26df0afc3d1587a4d47830a5a853e50142993f554882df9020c2bb","isrc":"DEN962200250","name":"Plan & Elevation: IV. The Orangery","registered_at":"2026-06-20T02:59:32Z","spotify_id":"09Ximwuz3QHrZb0VYs2HSR","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8a39d22d26df0afc3d1587a4d47830a5a853e50142993f554882df9020c2bb. 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/09Ximwuz3QHrZb0VYs2HSR.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/09Ximwuz3QHrZb0VYs2HSR.
{"copyright_id":"0x790e86a23c8dbb92b9e9e43cc8a4b685aa00c515a35e631c9beb49fb50bd098c","isrc":"DEN962200260","name":"Plan & Elevation: V. The Beech Tree","registered_at":"2026-06-09T15:45:00Z","spotify_id":"60cerSA8G8dcXI0X3sKJvG","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790e86a23c8dbb92b9e9e43cc8a4b685aa00c515a35e631c9beb49fb50bd098c. 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/60cerSA8G8dcXI0X3sKJvG.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/60cerSA8G8dcXI0X3sKJvG.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599291222c2b04007b5f4628fa5d6c02f6a704b977a9f79f9aaba9490fc5c7ce. 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/6MyFal8h8ZENjR8fXlViPT.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/6MyFal8h8ZENjR8fXlViPT.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512bfa2250dd93b6cf55210a82e7e6ad93126503b270226ed4c7e701f0cb51c5. 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/6xU4Yc6RuKG8LaI2zbYmok.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/6xU4Yc6RuKG8LaI2zbYmok.
O vis eternitatis (Arr. Tormod Tvete Vik for Solo Violin and Strings)
{"copyright_id":"0x270fa875b1e928cf4ef9bd22e7fb7c1e60cb9f8a9682381ddec576af20d6506b","isrc":"DEN962102960","name":"O vis eternitatis (Arr. Tormod Tvete Vik for Solo Violin and Strings)","registered_at":"2026-06-22T22:22:20Z","spotify_id":"00t6U8HFg0gMaLGd9XWmr0","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270fa875b1e928cf4ef9bd22e7fb7c1e60cb9f8a9682381ddec576af20d6506b. 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/00t6U8HFg0gMaLGd9XWmr0.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/00t6U8HFg0gMaLGd9XWmr0.
{"copyright_id":"0x554dfe9e4710c9f6ecc2504849068af85337b56b4d6c5468909876b3f17d7786","isrc":"DEN962102970","name":"Halo (Solo Violin and Strings Version)","registered_at":"2026-06-09T15:42:33Z","spotify_id":"4VFzewUgc8FjH5J7AptyCx","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554dfe9e4710c9f6ecc2504849068af85337b56b4d6c5468909876b3f17d7786. 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/4VFzewUgc8FjH5J7AptyCx.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/4VFzewUgc8FjH5J7AptyCx.
Bær (Arr. Knoth for Solo Violin and Strings)
{"copyright_id":"0xd3fe9d4c019d21629625ede9be2037308be9f213505a42119fcccd99dfd3df44","isrc":"DEN962102990","name":"Bær (Arr. Knoth for Solo Violin and Strings)","registered_at":"2026-06-20T02:57:21Z","spotify_id":"6y5JE32dsdtJbvpew7TDga","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fe9d4c019d21629625ede9be2037308be9f213505a42119fcccd99dfd3df44. 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/6y5JE32dsdtJbvpew7TDga.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/6y5JE32dsdtJbvpew7TDga.
Reverie (Arr. Knoth for Solo Violin, Strings and Electronics)
{"copyright_id":"0xc2dc47c0e91ff77de9af297103a98c42dad7c0844d74c7523b78954586adde31","isrc":"DEN962103000","name":"Reverie (Arr. Knoth for Solo Violin, Strings and Electronics)","registered_at":"2026-06-21T20:02:16Z","spotify_id":"1fJyNWVGtrS4Pn4TBqsxut","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dc47c0e91ff77de9af297103a98c42dad7c0844d74c7523b78954586adde31. 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/1fJyNWVGtrS4Pn4TBqsxut.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/1fJyNWVGtrS4Pn4TBqsxut.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94b569895f4c7dfb8d0a91ccc855d61a65a7de4250fc0a03acabce8afbf6700. 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/2FVFxpap9I7pRO8s9u61oZ.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/2FVFxpap9I7pRO8s9u61oZ.
Hammers (Arr. Knoth for Solo Violin, Piano, Strings & Electronics)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599291222c2b04007b5f4628fa5d6c02f6a704b977a9f79f9aaba9490fc5c7ce. 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/6JNPNujDSpskBzMzN7lXTI.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/6JNPNujDSpskBzMzN7lXTI.