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 0x59661e2e7ad06683090526aa069009278b839496b46be1653599e208528c291b. 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/5dce2a09-e8d9-4d99-bd02-552015168046.json and https://artists.proofprofile.net/proofs/artist/5dce2a09-e8d9-4d99-bd02-552015168046.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 0xf668f8a89ff45622a7209807cae886e9872f15c271eacbd4183eaa7fe4765b8e. 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/7N2q0xl7YJ6EB8iHatfwPo.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/7N2q0xl7YJ6EB8iHatfwPo.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad84fa74119a3a245523f9b2d9d4b80e2ea40c1a96fa89363eb6a149a1717cc4. 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/3dzMSEy7d8NEdfeLqe2zdW.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/3dzMSEy7d8NEdfeLqe2zdW.
{"copyright_id":"0xbe1bdb8b1a6b79c631d983b1437b02e62f6f91e9232c7d7cc5f4125cc5b9629d","isrc":"BXR761600005","name":"Prendedor de Varal","registered_at":"2026-06-08T01:48:26Z","spotify_id":"5LC8QleW2cUXU8ShsaVDFr","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1bdb8b1a6b79c631d983b1437b02e62f6f91e9232c7d7cc5f4125cc5b9629d. 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/5LC8QleW2cUXU8ShsaVDFr.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/5LC8QleW2cUXU8ShsaVDFr.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca5af62f44e7b48168ddf6ba6223ddb3c0f321955895127a24189da1ca5295d. 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/1oke7Jkp9afNQzTUD5iHZZ.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/1oke7Jkp9afNQzTUD5iHZZ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7426a393edeeccacd1346cdd00aa00639d086d7892d740eb5d721f8e34f904da. 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/1tDaVVZGsDSeT7b4MCPjaa.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/1tDaVVZGsDSeT7b4MCPjaa.
{"copyright_id":"0x36a1b3df65c5f23a38dbd9699d1ea1ca13abe336716fa81be009b65cd0d651fa","isrc":"ES71G1627470","name":"Louise Du Brésil","registered_at":"2026-06-07T11:45:44Z","spotify_id":"6Ef6r5wd9L1ldyTLY37Cve","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a1b3df65c5f23a38dbd9699d1ea1ca13abe336716fa81be009b65cd0d651fa. 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/6Ef6r5wd9L1ldyTLY37Cve.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/6Ef6r5wd9L1ldyTLY37Cve.
{"copyright_id":"0x91523d1fd3c2cfaa032fff1f1eafb350ee4384e5d9dc71370013a107291067b6","isrc":"BXR761600009","name":"Sem Nome, Mas Com Endereço","registered_at":"2026-06-04T11:36:36Z","spotify_id":"6xh9JILM2rzAtRynrTAAhe","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91523d1fd3c2cfaa032fff1f1eafb350ee4384e5d9dc71370013a107291067b6. 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/6xh9JILM2rzAtRynrTAAhe.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/6xh9JILM2rzAtRynrTAAhe.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8f01f7643595527ffbc2b8baa5b5387e7794413c9161d60b5706470de40dfb. 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/74d129hlgS0hebrVKwqCZG.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/74d129hlgS0hebrVKwqCZG.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789ab0bf04dfcb3cc589ba2a4417f988e09eeb8988a216e78185a1b386a738c5. 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/285D2BJTyUYQy1KC6oI4pG.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/285D2BJTyUYQy1KC6oI4pG.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9e24e269bba938b65cee8a7283bfa00a6cb1593c04b1eeba448ce4c3f56495. 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/0G7AtVdCLQAGrGjRbLvCeK.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/0G7AtVdCLQAGrGjRbLvCeK.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9f319c44e91ee05912fcf4ccbf74b76fc8ed7d8223a84b720cd8fc66e78530. 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/2arxf0qwSpidhAVwJ7v9gV.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/2arxf0qwSpidhAVwJ7v9gV.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98a485aee53283592628034287f91a9358d3db452ddcf561ae97532d9dd887c. 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/3H12RMifECwqJvxAb8Ljp3.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/3H12RMifECwqJvxAb8Ljp3.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb691c5419bb4281953fbd7dd03bc89723f24fb7ea46911f5a11a8b48ce50caa5. 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/1vrZkMnH8avpqJDEiXmPwJ.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/1vrZkMnH8avpqJDEiXmPwJ.
29 Prêmio da Música Brasileira - Homenagem a Luiz Melodia (ao Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d345962e634b1493044f58237322d30d544d6c79c9d9f0564c027aa3d7d145. 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/6GsCTKDoAqjiMCeQoWszj4.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/6GsCTKDoAqjiMCeQoWszj4.