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 0x28cf0e155eb901add674427c068919e07e5840b3abbf373a87e2bf9893985c36. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b77198a-5bc4-4109-8645-7b9f4d213ade.json and https://artists.proofprofile.net/proofs/artist/8b77198a-5bc4-4109-8645-7b9f4d213ade.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 0xb1936bdbcdcd38fdc7267fed5a2f3410e1fc1f714a55521874acc906d4d3cbeb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBKPL1784294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d353fb98b5bbab7506d44095ff52503e15851f69555c80d61c304bd728b8f5. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/UKN7E1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a1abb3b3e95f2252c8cc523d712d95803672da4259299db1682517a6fc44cd. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/UKN7E1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009cc855cc799c1b9b387fb9e2a9ed9a584e14114e53efbb7b71d74ec0e8876d. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T02:35:28Z), 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/UKN7E1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce7e40ce1f96f0c3ef7784e51a1852b4512039d8302739d6a270cb0b2aed1e3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UKN7E1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1daaa87fddefc317ca116ced880689474efcf1b8383d625b8b08a8a9d32f843. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:21:45Z), 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/UKN7E1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2f209ceb272ff9c31d83add598e5b6cbac78dfc0db09840bf2cf1a702ac1f9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/UKN7E1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb436076bbba7e470e09e124bdc0421e236375a6a31452dc50503cc00cabf9d54. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/UKN7E1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74968dc7e2fcebb69ddd33cb6eedbb449c97430cfcf684d60288c92cc4e2eab6. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/UKN7E1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc084042ec785356f9549b50c8fc0ce27c4a8252df129a3d434a2ac5ac4128ff9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:11:38Z), 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/UKN7E1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae92fd7345c18e37e7a4e72c35a30b6407770206d17f273576dc293752d25fe. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/UKN7E1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6674cdd641c2513388aa7efafcd1db4a74c9d08b3ee7142f2bd257a92cda4f8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/UKN7E1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578fa25e0b7b668a9b18cd65c2caa421a2ce8bb755e95738603fb485e21180be. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:36:07Z), 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/UKW3Z2400538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf82a0911cb2885c154861f26ed7eadd1e5da18596b352cc309740fcfd8b7e0. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/UKW3Z2400540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c3609483589df626609d8018c363b956fa8e29cbba94e91be37353293dba67. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/UKW3Z2400542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7134cb5885c2951efbab5658622ddd56b60e5fd2700529b721996bf3306e7e71. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/UKW3Z2400543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe87749aded033135a819b4a55a0c8efcb0786f43de7e1aa7de7e25518608f1. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/UKW3Z2400544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871c16cfeaa27f9a00c529d7f27e3ca6e11e85a0b568bf8a413635bcc700fb6d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/UKW3Z2400545.