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 0x5e4467805163ae4767b638b23777b78b58c5f647fdfadbeca64199c31ebe6f46. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1f08e89-d9e8-454b-99a2-45509a1addf7.json and https://artists.proofprofile.net/proofs/artist/c1f08e89-d9e8-454b-99a2-45509a1addf7.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 0x2f1e5bbde85c7daed550cf159854448d817ab7c5b749a39757d45eb36402aa7d. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DKUM71700307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edc02a1fd54ca927e74e0376af2dc43a9d5f9049c0fd0010cb14d1597ed8c3c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DKUM71700343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4985b329e376557c46d58f0729da60b14e73436cec03a86f1a4f3acdfbca8e1a. 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/DKUM71700344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a1c7c25e9f15b60cdd6046eee0c0e57f8d483b665b096b013eef4b2dbc5953. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DKUM71700345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7baa43b6f716f5d698cef2f827312737e7932b472f5ebb4c6d31d3fa798c4257. 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/DKUM71700346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4ddb4a403d03591c2b227eb755f85e5cfdc105f7ecd5919caf12a64bfd698e. 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/DKUM71700347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615bc56f1999cde4ceaec589d9278a42a4f2d07b4856ebd1092482a1f1c6e492. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DKUM71700348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca25cd695e66cf7992ea9f82e1717bcd80607c4149d27bf8be1ebfc3f997a8f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DKUM71700349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc5b7112a54c46956943bdf489c17cc2ca0d32d7740da2c8c903f840443f646. 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/DKUM71700350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348d826b1fc6c95c31cb494842f4b2483cae3bdb6902507ba851c91eb9467500. 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/DKUM71500229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d9539a3c30aed1f35e2c869d7b59188ec5d1546a91c5051cd6abc7239afb4f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DKUM71300410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66b5ae61ddd0c7a280a628867293068db7080782626859bbe0054bca2f4eedc. 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/DKUM71300100.
Så Ta'r Vi Cyklerne Frem - Hjælpemotor Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141cfd143b4abc7cde68620a17bb9b92ac652869b96da60bebe17427bf1e1a3a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DKUM71700351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfca0f31f9870097882f92d2879fc0887cfc01743273b3466cd53cc094373237. 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/DKUM71700352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7088df9ef940f63766cf086a68bfe4adf43b5663c23e5aa30cd4d47cae29db4. 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/DKUM71700353.
Hvad Er Der Så Mer’? (De Allerbedste Med John Mogensen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66b5ae61ddd0c7a280a628867293068db7080782626859bbe0054bca2f4eedc. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DKUM71300100.