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
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).
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992a2ce9bd1192e36a124e919cef2949bcd14e472f0d2032a3738f546843055c. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:21:20Z), 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/CZA232100554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979cefb2569146c09ce92467f152d7266b9eaa4530da46e5e2267f4d3ba5b88e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZA232100555.
Hulim Chemku AF (feat. Patrik Love ICY L)
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 0x35daf04a7dd51b358a38946adda3ac5abbc71407bdcf9d53237f945df0357ac0. 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/CZA232100559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3844517c1e70d1d29790748810b4ce9694abc1faa06106030ccddd79d8240adb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CZA232100560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c76b0aeea630a64015187abc3fae5c991ff17999fde34d7b7e1e084c718d35. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:35:28Z), 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/CZA232100561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f80135dce02f23bca62f5d9b0460199e8363ed4445e3db12d81342210ead117. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:26:19Z), 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/CZA232100562.
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 0x9f75b3f22a175f589c7a9e7bcc79fddeef87a1a403fe05259aba14d6956ca320. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/CZA232100556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13daa85dbbe726a7c7e006cd54fe3a1fa18b0142f145967a2bbdf76341a6e91a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CZA232100557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8d1849bceda6bea0b0538bc1bca8825b820f4a91ed5e4b71d6140ab0f06695. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CZA232201192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbfb364cc263c695bf42bd2f54641972ad1535884955d6ffdc278c9a1ad4839. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CZA232201193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58f3ba260c27ba17d4fc31dfb8302f4ca5b8abc4ff005a60dd0818a3c0cadcf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CZA232201195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1e523821ed3a4593c3cab1774566e85260c95e48e23f6dd68b7c2a9950d25f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/CZA232201194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40079c563c923599bf6864d5578047fe7a938526532daae513e0cbd2fd3a6739. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CZA232201191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5538fe63cb3832ab099d94d750ccc0a30c8ed612f34cab24df2d083c21e54a. 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/QZK6M2017164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174ffaf4407aa662268f8269d3e4e94d2558fec2d96c9bf9613d721fdcb6d02c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHN52002159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd88607bc2e07c6a3f07f37d63c155760f07a1e03343bbe22cfc657e7af2755. 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/QZHN82057850.
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.