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 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 0x255dffa52cd2c32b12514aea7ad530955d5df8abc752e36ba29eff07fef0973f. 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/08d48ac8-fe40-48ca-9e85-bc5ea83b37e7.json and https://artists.proofprofile.net/proofs/artist/08d48ac8-fe40-48ca-9e85-bc5ea83b37e7.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 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 0x79336e919d691d4f82a13bb334d9e0d002c06a13a0b32b77d3208eedc4638c8c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GBJAJ2001255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f115d55c83d98696993b534709930ba406e4d6bcc430f8999c3abf79dcdd17. 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/CHA042200281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7426ed532e12e7653de55c136da4564e52e45494186adf5bc9119ec251e2bc3b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBJAJ2201181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c9c25f67641d9eb1a8db588dddf048c3cc4a5d9f9ba49f44738add8793069b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES94G2329004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ec5d0697de8c6d843821e905cf157a4c3c595921340cd7befb67700fd9c3fc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES94G2329006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbdbdaa600b40f17a716f2745fce1cea9dd20e473a93752109ebd56ccb487a9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBKQU2414534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3ac744adf8b4bc2ec1b444f30d5a7a23efe75b6a0216a237ffd04f2dd62ad2. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GBSCL2400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc577785c527f6477d42114cd8cb3380a9e085d226102bc0c82b99c9f91b3cdc. 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/GBSCL2400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c99824e4df4e51620ffbf399c805d727876b1a0071b00c4927634ba373a40b4. 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/GBLV62407609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf1d15c0018ad916faada6beea03f128cf5cb8a5c13e5cc691d9c9936edeed4. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/GBLV62408568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c99824e4df4e51620ffbf399c805d727876b1a0071b00c4927634ba373a40b4. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/GBLV62407609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459dd1177e650b3c2adc9ae6ddba57e48d974c97ceabd6a67ba036a46fffcb3d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBLV62408572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88a17c51ca3a94abb39965cb29897c406cc1fd7bd2e536d2aa0cf5344d171de. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBKQU2514056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47064d9417799ac092817f4535063389d32635a5fee461e5f678ddd6fc976985. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/GBKQU2551015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbc516f702e3c1a35cdbcca8a57af4e179536d99d6fc859daefc259bab543a8. 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/GBKQU2551016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93420de5f5bfc98d3bc221801d0b8739084209d9e48d50725f9eff45e5d706d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBKQU2551017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b72da8ed028437dd45e87e32387b0179e834aea9d860f275ae748ea46ef5c13. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEL712000169.