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 0x3332ee538bc0e3a33a894a4e0bfd8c6a378fdd02badc3c1fb42dcfa254763bdb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3251128-a6a1-46c7-b0db-99aa82b05430.json and https://artists.proofprofile.net/proofs/artist/d3251128-a6a1-46c7-b0db-99aa82b05430.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 0xbe2044da67617f8edf1955adba0d0f61d242f710991c2ed0d7de9206b1560ad4. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZ5AB2099898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814e400bb01ac3fd0fd263683fa8287077361b5d56e580ceee21835a8ecd3b6f. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZGLM2002679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b16dcab3c6f61eec8c2b6401922a8b414f1a0715d0fd7c09e5a61610a90eb4. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZGLS2032720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2e880fc4ff3c2d15842ee6e0f10356e634240463488ffe7eaf8d073b9226b5. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZHZ62040888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f4b6619aa225f69dd5c583361346c32af911bcb1882a46c95b1dbb4d5f82b9. 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/QZHZ42150594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613d6ba28362e421a3dc26ec2ca28ce3430ff8971be1c3ee156af70ebe0f1119. 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/QZNJW2103642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc4fb5f56c42c93775881a52fdc2b68ee660e733a6b84f02ae87b3bfd86f1d6. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNJY2300804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fe2acd8c4e8dcf5e05a0340ea0887c059ae01b473c9c2cb3c034ee09bf76f9. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZTVM2391234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9792b798e8aa5ca8c39bdf8945520fc713d9ef4aeebca9a61a83091f1c2bb7af. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNJW2425492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5066b20b8cd1ab9d4b74aad8e1f73b200af9b804f8d39b484b2c325782dd0df. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNJW2455662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5aa1db4789a1a0e88fd2c2fc1b9d02ef55b2eaccdeea24c77b0b71f028e189. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:38:31Z), 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/QZNJY2489484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6444aa2134b36041653fbbc6f3958aa19bf3b9fb828ec857f6a4b1ce18c745. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNJZ2413219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07ea4084bf51db1b57455bcf3dd0afc7e0482e05034110c8858d58533a528ab. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNJY2489362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb801319571bcc18272f888b2f72a18f32f840066f058ce2df5fb2a6864ce55e. 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/QZNJZ2419192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d71e20a17ce07974b50554e62d2f9895dcac13e100d21f8101545e643c5a9a8. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZW9K2485730.