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 0x134b1827b0049ea8ac80af5d1cf26f6807a524b7122cfe6fc4baf06fef19b69b. 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/5135cb52-1d18-4483-8e5d-d671900f8e4a.json and https://artists.proofprofile.net/proofs/artist/5135cb52-1d18-4483-8e5d-d671900f8e4a.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 0x993d2adc75b7429488764e1313310d6c82c2f0e5ed42bd18348222d237c90025. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DK4YA1502504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d8e4a396235700433f2685d52d3319936f491d0f7e29734f7c11efc60c6cfe. 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/DK4YA1502502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d8e4a396235700433f2685d52d3319936f491d0f7e29734f7c11efc60c6cfe. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DK4YA1502502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cb32c3746240d704f3d21b740fdbae4603ed87187264600660f951fd1e5381. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DK92S1602001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6604882452ef43dce470c713e9b0450b90a732e4c416af6a9af1b4ef5324fb0. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/DK92S1702101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454229c462e80b184ef9269582a48693ea548ea6b66cc863e835b1448542627f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DK92S1700701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8c43c0110bb44582fdd2c5e52c27d003e2ed535bdf3411834134d60f530cf8. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/DKUM71800754.
Elevator (feat. Jonathan Elkær & Wads.png)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6510e079e6a44514bdbaf106ef6a0fa39fbd3df130dc3c2279783a5e45616642. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DK4YA2019101.
Live Forever (Marcus.wav x Anthon Edwards x Thøger Dixgaard)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba076aacb23dccc9bd1710c04428084396727107b18a271c5c4011e33b62c00b. 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/DKQ272100128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50e8807ccba9839f37a5b09ad4c58995be357cf4b49a84471c8fe1a81c21ebc. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DKADG1800384.
Toppen Af Poppen 2018 synger Lis Sørensen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf89cd4b4d8da3b0d4c36da7d971317ef945f110ce9acc593955a56d197037a. 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/DKADG1800417.
Toppen Af Poppen 2018 synger Turboweekend
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9863f08175bfd39dcbf7f42b22b3872cea1be8e699f2b07cf75ce664d802c9f0. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DKADG1800439.
Toppen Af Poppen 2018 synger Pernille Rosendahl
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45ca8b23aa9f541de43277d0320019a474a4b6a585c966eeb7c8eb1f048e671. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DKADG1800395.
Toppen Af Poppen 2018 synger Annika Aakjær
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa05650cacc9edad104aaad4a82dc170fbd5cc9df5331fb080ef7dbc93127ea. 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/DKADG1800422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde81b20ea5b9c912a92aae707d04f4099b1ffca0679b67ba03753f0b73c43aa8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DK92S1805001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde81b20ea5b9c912a92aae707d04f4099b1ffca0679b67ba03753f0b73c43aa8. 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/DK92S1805001.
Toppen Af Poppen 2018 synger Claus Hempler
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3913a33ecf57a58d12458425961ba3568ac11999dbc7650fdbc8748ffa8a0d67. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DKADG1800403.