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 0x1dad3c47badce54d08ac1a76483c6059a30ba804fd13d159cd1937f070e35434. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9969cf5f-c986-4ef0-b125-567cc39982c2.json and https://artists.proofprofile.net/proofs/artist/9969cf5f-c986-4ef0-b125-567cc39982c2.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 0x83ccb161d2505fa12af297a1436592950cdc55b92ca1ae34938af2018a4002e2. 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/DKXJ21900701.
Rigforevigt (feat. Louis Valuta, ATL PETE & Baby Bino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc146b3c0c8d59a7016dc74472b003f76c618aa737f113ec6b240796d3d7b7098. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DK4YA1717001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd1df97469875758418cfc9ad53bccbdb752dc0272632f0fc839ef22c50813d. 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/DK4YA1717003.
Almindelit (feat. Baby Bino, ATL PETE & Louis Valuta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c6ccfe71b87953b48f97aab0a023de7567b244fa985ec3ca4cc1c2ae51764e. 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/DK4YA1717005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9bda4915a45a2b3f16b44d18a70655b9462b4d3bd415c11208cc1037a0a12c. 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/DKUM71900271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7a8e77b705b7c5a1844f6dde4af24483f4e31448aa26bf87a849e31811397c. 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/GBLPF0237509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfc043e7e8c42b0b0ccc9d76feb74ec2a2b3e806fdc1de0f9efe705a076d503. 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/DKUM71800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65aa039cb2d62a31e51e5d516e2121aa4b8ca64b8f61ba4959f74b1e248fd6c. 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/DKUM71800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fcb5683bfa57f5ae0a53b63d7b13b342ae903da13d60145d828c33df524e7c. 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/DKUM71800125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5fa53a05c351683b8f1eb46aa93eb01370df2a0e974e6f2c4418c4bafeda07. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DKUM71800203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c756a30f6aebaeed8d445b7df9db3e76b00809c7377b53c40fc0ca3effd43ef. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DKUM71800189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95c88725cffc90f74d3f9c62dbd3875f153239eba67be870f39edee0a76d4e6. 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/DKUM71800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e385c5063c660a9568f28b747bc3aa305d404ff3c2971ce281359d045d6ab3f. 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/DKUM71800205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4d442ca9ab164ab3a64bd731bf685fb00e6424732fbe4ed7e1bd77e8a2cf3d. 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/DKUM71800206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59693c805e4d5a51aad057809b3c454fdc3d2419957e94ce7c461f8e7c1f873. 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/DKUM71800208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92891cd10a9b3f90dbdc3133b206f185023c62e924d18982b812c4e7f32b072. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DKN381900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6519fcc964ae9bb43ff172875e982eec1e869db77347edfd848f05fbbd564f3. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DKN381900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e38205eea8f53ae6e04a84a647a9560d31c88f5a769db19f6f0f75f6b6d04b. 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/DKN381900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc753f6ef462860a0c7e99f644df0edf4e98dca0e3f321e0ec987daf39357f763. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DKN381900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd67ae820453b878db2928465f1c2ef09322e28e527fd32a8fdbc3e1516dfb25. 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/DKN381900105.