1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c94ae4d785d05e006c0f70ff713b2c77964135fa18e97ccd217ceb5dc1ba0d8. 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/833d12d9-ca15-4481-9493-20cc705d11e2.json and https://artists.proofprofile.net/proofs/artist/833d12d9-ca15-4481-9493-20cc705d11e2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77ac4960c9a9fd4cfc80e362b7a19323c9fb24d8704f3d3edfe100418fb0038. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:00:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SMRUS0043287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5731509b420af0166c75e943e03fd2ed1c6fb3733e9441df913cd30e90558a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SMRUS0043290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a874dc0b60e02878dc77a86eebab13617dbff8a39326e3c9888cb2cb3f27159. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SMRUS0039720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2999cb580d1d1e954377bbd0d51b784f44b40dc07f6ccd94e918832bdd05ea3. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SMRUS0043299.
Лесная царевна (Версия 2015) [Бонус трек]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86442fde2e2a25ecd9cc5df7263581cd1b1b5163914d01c4e2cbeb20b59a30e. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SMRUS0043310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdb6b287f6b975ac9788b8a6eea588393dbe914ce0c2fe457aa470cfb3a58c8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SMRUS0061213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9f845e3411225b96419f0c7b96593416622d62f61b44bbb2b20e9643df64fc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SMRUS0067376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4573fb90c04a3621bec98adc642cf3b8b5ebe07710fe4a6e7783395270f79a8c. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:39:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SMRUS0072328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12f32870d492e2b2e5d39d1d8ecdcb0b6c31eef10b6a1d30cb669ef5099a49a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/RUAH62432623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe6ca18e638430ce4c9c30e36240810fc5e51b9330641ff38493599b68193ef. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:49:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/RUA1D2519484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52758f78424c3b4ecb40c4251b8ae89f0cd04f240d5414f3fcd5d486cfae9732. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:23:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/RUA1D2519485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6579ea2eb9abab62997b1d3f2889b9665be0f409b907af7a76b0166570810792. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/RUA1D2519486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea050f69271582a236294af8c11888bceba6eeb88338b43d494aef50a2c42ff1. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/RUA1D2519487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11adc8d11553c40f731e05dfc916525c98325156ac3272e860c1479f27a0cb9. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/RUA1D2519491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6830778f86e458873a31c94f589a1108c4cc0e86b1b2143e5d17236c719d9e49. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/RUA1D2519492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839954170273ff9fae5f36d1c9f9a0ea4a1765a40c1f7a95209466e36fc05f04. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/RUA1D2519494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10ea4673e342b6912d68a37434f8a653039ceab2206d3997b607c092d985e14. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:10:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/RUAGT2569703.