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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d4ece69274d6cbc93e7a5adee4d058726376e2381b090f8b4ad7f1837426cb. 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/5d24ee5c-82a6-4b33-97c0-65e22aaaaa90.json and https://artists.proofprofile.net/proofs/artist/5d24ee5c-82a6-4b33-97c0-65e22aaaaa90.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675daeceda52022b58174bcc456a25738ab47b884266ffeb59e75fe817568080. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKUM72300747.
Lange, Lange, Lange (Emil Lange x Område 69)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c34457bc0e4775826849d7039bcb580c5f1934a2f06483a53ccc0a3298e9c9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DK2DY2300531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e651968165b87e68dee9797504f891bf9e96cb7ce83a75659a0f8ae822a5b80. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DKUM72400237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7144ed76eddb27e562af7f2ea426b06216190d275ee4d4b76c1e692354e5d61. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKUM72400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b3a1bccf6a2567b9f3299d8fb33103313576fa40676588c9609cae9cfd749c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DK6922400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b794c2331d6f81e0758518bd5994fe11474a81955b3bfadfc5b1f1dac0769f5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKUM72400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3371edbfb7809dffd88c7300e35c3e291863ad5e2de60ffe762ca2d7b2523c91. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKUM72300627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c1f1da92efe08b20f7c8701166e5891697641b6ccae18e98d3468a153234b1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DKUM72300585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c8f2f82b0172b719c0584f8e193011a0e50434fd3efdb89c122f36c19e6075. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US38Y2420993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6651a2d8737810e8c9283b104688f668d6c7781f3355febfe1e39ed7bc836893. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKUM72400431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3db3bbe2b53be34d3220192c1fa40d121c6fb528ed17143ccabda1214db4b68. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US38Y2507989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3ba059a67aeefb09fde0857764cbe9bea8cb69fee5068ae2043970b71318bb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US38Y2507990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e0bff0d2126957721df94f3fa60afd89a19c6fb793df6556eb2ec2fc3a3c0a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKK1H2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ae2d306c72f1934ff158fd8ac5e746936f7224de70db02d718c3e4bb0eb831. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US38Y2507992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf784db4ab64fc9244c71b7f788babd8c6998ebf3fd0b192ad45a6cd91179a38b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKK1H2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a9426768824a13b3c78348f43c3263d7e2319f2ca8ff3c890cc8143763dde0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DKK1H2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07579cd96dd6ff4a8d7c3667a31e0402609d2457dd9fd5d5603adb7d7317ce95. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US38Y2422639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062ff9a1fa4008b7ea54f2c3affa6198fd0ce520838653da1b62a51936e28abb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US38Y2406593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369dd312a7e02fdc1198ff2443983945fee1ccdddefc3b4b981ad8c7612097f5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US38Y2501133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6c8129d239608276764d39705e1c1f80e1ab28bc4c1dc74eca377a2f4f0be4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKUM72500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa077e26558ae820e5ca92aaa6020109fb9a4c21887cedabcb074554b4906d4fb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKUM72400552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd2f5b951e4e8efb15bec8dea86351ce84e51e64a21076e961466b2b126ef4b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DKUM72500229.