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 0xff518c597599fc6a2b5a9b914a94d86350cf80ed9f85d9a53076b5245bfa88cf. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd44d7c3-b419-458f-9b5a-74aebe6cea50.json and https://artists.proofprofile.net/proofs/artist/cd44d7c3-b419-458f-9b5a-74aebe6cea50.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hulim Chemku AF (feat. Patrik Love ICY L)
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 0x02844382de4b46bf268cc43c6fbdfd06f99ac565446b1525d97f92aa608463fc. 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/CZA232100558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1b3916c2e84d339913f9d54dbc7fc5cc6184d12fc3f0d33ed488827c26f7c8. 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/CZM901800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d1f418307df92e99d4a6d5e2672346cc90f14afc230bea5f306dabbf5d2a84. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CZM901800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2957e93dcb13896d56322fb3d01f136ec9c773c0aa62accb3d18dcb83fe6879. 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/CZM901800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26120cb4de18e59bd77390c513da2fa8154b8c9c4486e909f15f9b042ecb28a. 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/CZM901800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ec417e4186c836d9af6c2c2e1195b2a3a04d71490706eec78014bd1352f80f. 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/CZM901800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844f079e359a69381dc72bfe6867345e812f11796dcd2f6844ba71e6adb5ee7f. 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/CZM901800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b5cf7f3e747fde45ba40882dc39c1af2ba8b82bbcb13d2ed8d9d2a574dff3a. 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/CZM901800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf9e1294d65443666f8fd4948933e0ed7a52ef021e17e4c167204f286b4c34b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZM901800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1995f86bc0f8adb2570edbe44a47b4bc1dc36defd960058ac6cf01036d00f9d4. 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/CZM901800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56c03b06d019a23f3062d30ec76cea11ff1f31696bf669a2b736a1efb114cd7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CZM901800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064925d0dcfc93efab1eeef1171e4112e85d95dae438b77593b9aa071c0d69b9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZM901800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5625e985ea61967b2a5f8c36dee850a7cadcde95fda89f24a9959933891898c. 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/CZM901800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fb70cfc6618d4ea9b818710033040bd291b05890e6186e9c0bb2bdc2b05c93. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZM901800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61d87277efff7bec46e47132fc66827b686d39410170c0220cc43f8f89fc540. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CZM901800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a451e134ab0bac39f94f866916f65bfd88a0513b6a55e2fcbdacdf076377e8. 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/CZM901800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cfb01ef099f8cf7cd52b84bc5e9a4f461bcb1a3ab590250dfd805e5b87132e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZM901800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326583ec44a686de5ea440ba232c66432ad6fc45c64363d847ff72541d3ed613. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CZM901700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08bea959d15e057d70f1c2123a52fa9b919867796e0788b581ce4cf911913b4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZM901800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afedb9c30b8eafcccb5832121de5e877425141a59d9912cee442e3c18b05155. 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/CZM901800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24d520d2569f1680deb85822f6fa7391c04cfe10a97ee3072c56785a2e37c7a. 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/CZM901800035.