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 0x8ffe3d6291deea9ac72ad256948225d36ababb8adc9275b444eee585c184ac87. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d996c04a-5af7-4549-b606-9bc60dd70347.json and https://artists.proofprofile.net/proofs/artist/d996c04a-5af7-4549-b606-9bc60dd70347.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 0x38ee77f5d368fa449f782a691134fbf605e2584ff00c98b8f41c1ad958cddf29. 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/HKUM72400238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a087112dc4131b2a26750efd59a0ee059dc6bad792b49b50c0c61759f60d162. 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/HKUM72300437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e7089a06520ac99c04a5d80f9ee49a462c119c36074bd52fc744b824f465c0. 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/HKUM72300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4109808937a12aced0e05ce43ace09b5195b91ea570f9eb6c7049b4cde51bf. 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/HKUM72000322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628b92482d9cb4ee9b4c1a3400844414bf20ac2da4a74935cad7bae14aeed834. 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/HKUM72200276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afeabaeb6c2aa9e86d8e014730fe9090b7e073e979bb0391ca6793bcdab9e7c. 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/HKUM72100510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1625c4cc88fa17e741b4362caf5c6bf9941184db1d9e0af2c11789b7cc9cb024. 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/HKUM72200413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1467148871e7620119373cbbe038c5d16ebc03b11312d2422e3da9b0ae91d24c. 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/HKUM72200598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e7089a06520ac99c04a5d80f9ee49a462c119c36074bd52fc744b824f465c0. 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/HKUM72300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8caa5783d08bdd979b7c6c12407733155582d4e5e529f1fe79f17d35b942e3ed. 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/HKUM72200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590ba24d40649d1fcf01a0b8b9d3c221ed01026a0d623001f18f6f85e0c151e6. 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/HKUM72300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1203d50af40188f9d020dc1de36407b8044a2b81a99c202ed5cf50b8360d8e. 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/HKUM72300378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6f3e71d767733205ae44fd27976bd335601149296583a2e310294b0ca23d0e. 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/HKUM72300408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb371484e9ee4afaa7a9f72f44b763858b38cd774862cd29efa2a56ee019a094. 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/HKUM72400235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a087112dc4131b2a26750efd59a0ee059dc6bad792b49b50c0c61759f60d162. 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/HKUM72300437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54499a7ae26ad9f3759119c8c6c9b470fe4a0f8297996d06ccad364238d4a82. 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/HKUM72400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88491ae33d2e96bdf0ae7e886aeae47686de76f7b1af98d373d1f234bf511438. 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/HKUM72400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64597645018726bf75b21fb7fc9bcfe381f4280099fc4198d9c2d5b009369719. 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/HKUM72300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ee77f5d368fa449f782a691134fbf605e2584ff00c98b8f41c1ad958cddf29. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/HKUM72400238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21aac40c0cda8724197c1d43664548b2661a33a6bd26abfd2af094037cb73b8. 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/HKUM72400237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d54925190fc418fad1dd47af00b98a5b2d5155e975d90f0da4bb364d23e0852. 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/HKUM72400239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c40866db32ffbd6119bc9a44c92decd59f5d8aed550faa13651b4c16b923371. 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/HKUM72000168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170c8a06da3018667db403c273e7abea1f2823ab916ce6da2d3ec2e260f735a7. 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/HKUM72000169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0eb236b536b716fd9a5b287cd716fcf0990d25ec10fb8ebf0c25f823031869. 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/HKUM72000170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c043bff70cff52214c65a98a69879e2e71cf584b3ae24520fe2eff9d871df85. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HKUM72000171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473b8392f453c464e312f65b6efed3c2647b025174eb3f63319885ed69ff0281. 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/HKUM72000172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e19119967f5b78112d6eda2c09e01c51029bd60731f4c2ff97d44468197bcba. 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/HKUM72000173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221d641cc50cc608c6995f9449d87aad037d8b161451276d0983f6aa98946eaa. 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/HKUM72200404.