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 0x822f0db4a71d790d8976d3959cfe80d85ec9170683530878dfeca74ad20ff955. 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/9be0f64c-0e2e-47c6-8a14-e66a14bfc23f.json and https://artists.proofprofile.net/proofs/artist/9be0f64c-0e2e-47c6-8a14-e66a14bfc23f.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 0xf1058aa9475e558ba822ebdba06ca698f8c94f7bdcc2e64c736b288340fd96c0. 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/USX9P0652841.
Cordoba to Kurdistan (Az Kordoba Beh Kordestan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b70867718393076853a42a1cce6edfd157ad4e4dc728f76584b7776e0f15c4. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USHM90847335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279a8b30437bdfe655600a718c2d9feda9853389000b3c6002dd286ae5dde24e. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USHM90847336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc908d6723c7f5ee61ab7d66bffd6134617f940c840d97c28abafd26b5056f8f2. 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/USHM90847337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424fdf5af7c18548d3205e88112271b38abafa0800c64afb31c2c16ad2a64216. 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/USX9P1006902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3fe3785cba5befea96c54cdfedcf71949356363f498574c1dfb9ee5b4fc614. 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/TCACM1654857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13b5da041b3c280609425a2f3ac54e21f1318316dd55a3273207eabfd28266a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZPXF2120432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ea7c71b7f173f61e5368ebad269ddbce0e0be0928026520026bd2a50230d16. 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/QZPXF2120382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cba09d38da448c5b03b5df057d8a4cc684b6cc2e2720930306d2353cffdf4f. 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/QZPXF2120431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bafaa9ef00317d45ac4e6b2f4a406ae591d2cf286f5dea82fe81368e489dbb. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QMFME1915616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6f246a957eddbf4af13604fc007fc2951a8e6a6c6f2cdb2574e2952f87aa1c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZPXF2120912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8a3b562531683ca888d8102b5c1f8b340d2ab34f6dcd8393af8d650acfa180. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZWFM2580397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba141bde80f58bcac616859e63fe0f57036adac9049bef6c2f9aa1c20915162. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZK6P2015588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd339ec280d25946d457f0250fbc40e51bcdc103e3f594d298cc96d8e2122ac7c. 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/TCAGO2274938.