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 0xd8a7cc89c73e679c561750da616402f91c68634b7701050e930fd9c08a4a110b. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db3254cb-2374-4285-842b-593da7ddcb00.json and https://artists.proofprofile.net/proofs/artist/db3254cb-2374-4285-842b-593da7ddcb00.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 0xc18a825ee983750229d34ee5eda1ec48fda9058c4f02eb565f92a716539e9871. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DELJ81806467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a5ee3332e84a68e128a5afdcd23dd05903be5835c571af6f8f233d3e6194d1. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/DELJ81806475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18190e9e5e3c523bf05aee7219110105114bdf02957deb4eff0edeca45471818. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DELJ81806478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af128e287918a2bb788158acb3d71e3bb282008edbcd6442567b79212bc069b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DELJ81806479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d79d989b673c5a9fe5924326f7cfd82d2daf556efa2e24aac4bdd74316f40bc. 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/DELJ81762577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe168fa9aeac0f9702ec37be312f56f211e87efea2d3b1935a3f48b3e3bb6cedc. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DELJ81762588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7c67512af789e8f0dacf0d94f1e18045911f26a96e5938b8b53a62bbc13df0. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DELJ81762593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b53d3798b81b8cfdd7a68614064bb4cf8dde7b8274ed42cb1a27603781cc77d. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/DELJ81613656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805d25ff058a17949f8da4648ad3c9f79ab801d76b35b226904e1a805e0aa54a. 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/DELJ81613660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72aad2a49bc53f86e8e8af757da9c556a713674e22156a15531640cc58306b2. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/DELJ81613665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae89525c169808d06401ab7d631d323a67c55c731173a9e48f9ffcdc1752a0d0. 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/DELJ81613668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fa789b70b1c9b3dbe9afe415ab3329640ef7e32eb7d509900f18d0a53f13ef. 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/TCACL1652612.
Crispy Clean (feat. Hustensaft Jüngling & Medikamenten Manfred)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128bc8fef67054dd327b6321ee041bc52aac1324f1451dbfe01b03fdfd33cc4e. 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/TCACA1452513.
Smoke Weed (feat. Hustensaft Jüngling & Medikamenten Manfred)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abb80372326ad2ebee1093e886f24065ed43fc08836d60b52117c679ac79491. 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/TCACP1675804.