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 0x466013a7ceeee980fffe765ceed0cfc80f07d0c49d7653d1f854fe0bc35139b5. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b7be581-3286-422b-99ae-9410d00bf8e4.json and https://artists.proofprofile.net/proofs/artist/0b7be581-3286-422b-99ae-9410d00bf8e4.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 0xa0960deec943e4e785d7460b0afe92e68e2adcc13529d0e96533eb2939c59d97. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:40:41Z), 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/QZTB82414718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22b1f23b77fd4f0507c4d343b2a390b7b2424c824acffaf8a531e6aef1849a1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTBC2431287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4bb1e6fa2daa4c66237f4d560172fcd028c8100d889692791be8e5f64d1138. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ62513201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77acae1da3066c250bf04b22ff0f8d2a61076fe120c0733e9da90671043bd5b2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ62580577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d19e1fcf77e76a58c6d56a6ac036f375b17453258d58a37fec06cd027fe986e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFZ62576096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5d4958bf05b6fc72be1454891fae6a3c3cc44df6192ccd0bd6ab68a643162e. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:59:35Z), 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/QZFZ62513214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38237db0de370c6c4c39846664ebed7cf0afbd5a9bc9ab4420e23cded6369d4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFZ62513202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9130073486d104ef0c3507aa3eda8e41d43cda08a1e4903cf731a6d127c55dbc. 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/QZFZ62558610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61903c61654b1bb5938e3eb0b1b3ae144b5e3152afcef39b410452815d8ca0a9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB82580360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf550bcb32db478ddbd2b8b8ccaff2a85fa9f49244f75c81abd64e269f97e69a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB82580369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5f84f214f70a24ba1fa6c076fde3ffd563deefbb656112775c3264e82d9f08. 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/QZTB82580371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33f6e150ab0ccdb2065462c7e7b4efc53851442e672b4f5ec176521a07bed33. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB82580328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5deae0232abe21975015746fae4af0b3af7715d2d5340a19af5603380708610. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:33:18Z), 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/QZTB82580372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe706fd8de3e7124c845902693ae5e622d2910049995e6ec18d16e9063c7eb88. 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/QZTB82580330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4c2a86fd4c2c2ba25a887e9b3080d717b226330c0a39706c137fca0103192d. 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/QZTB82580352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade2e7734c00a8e9af418eb25582c5139778981bb08aec2dee2d1b268d809c9c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB82580365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7c3b14c7c30bfa65d2297c76c414ada5a90e4d819bc89093cac5fa71c2ab85. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTB82578678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37b09c1277c2532a173df832b0e62dbf7c9bb6ff25b3aa573500252b5ef07fa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB82580354.