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 0xdd297e0bc88859487a31261481bb82b57c50b0131b2dd7966ff96ea0033c1101. 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/8f20eb01-3e46-46e5-96ad-ce498ad4e518.json and https://artists.proofprofile.net/proofs/artist/8f20eb01-3e46-46e5-96ad-ce498ad4e518.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 0x557c144cfdcd31a175079266639588c5f009a6449a41ec3a6d6d9d4cf2fd35b0. 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/DKABA0108901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc6400ca41ef59969325ce28f242dcb28f6dcef905f857e9118e5135ef035d3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DKABA0108907.
Sangen om Luffe (1) - 2011 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7904020a1afdbb84b042ce132b3f44ee9fc01598db015a77b7bc80b2deec9bb9. Chain 2 (Bitcoin): anchored in block 957613 (2026-07-11T21:37:58Z), 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/DKABA1104132.
Vi er Nissebanden - 2011 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ba36a9612b030e1eb26444a5953bc68ce4a59a1df4e48cd8f86d3eedec48e0. 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/DKABA1104133.
Hundeslædesang - 2011 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0985f011ca9220bc97c48bc3c9d8b48c6f7c08dbaedca7136345f04ec4d98d0b. 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/DKABA1104134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817ffa1141a786315a994c1c7e26a3d54210bb8012c6fbde590a6aa2fe4af03c. 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/DKABA1104135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07aaa34df8e9c5fd66d4c233752381076a8d0dffa060bd10d0e98f6b46ca10b7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DKABA1104136.
Risengrøds rap - 2011 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8b4dadc35a92a4c2c873c23c31815a405e538d4ee9107501eb2d360e69eaa6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DKABA1104137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ffde7d34bfab5f9ce43c896d9dd709840d76d524ca033cb4f99071a7e0cb7b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DKABA1104138.
Legetøjsmaskinesang - 2011 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588498ae5c1c4609ae5d9a3d0b0cff5d11681c0f0d4a5892f7d2edf3b7422246. 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/DKABA1104139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f86c65d8d1c4b58fb3957f37f42312623a013e0ecef4b7004c7a72a2fb3116. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/DKABA1104142.
Nissebandens Bedste - Risengrød Til Alle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8b1aef1a82aea4a68409381188a44086330852b07aa9072a15d4f7c1f006f0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DKABA1104130.
Nu Er Det Jul (feat. Marianne van Toornburg)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309e50ecf55e97611b60a375ef95070d9826413c1d6f8a95eed3664809d52dc6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKABA1104128.