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 0x266ed9a64ddaf4a507f57ee58c8b03a3d17460c100f13f24c3e02be863747fd3. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97aca266-746b-4cf3-9d10-efa40cb2925d.json and https://artists.proofprofile.net/proofs/artist/97aca266-746b-4cf3-9d10-efa40cb2925d.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 0x5b22511260c426980d995d8ce545d076356b54824a4c3c3060594f4b1e5917b2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USSM10027689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062ad667fec5820ca7daa28ce8e8c704272a119447000a15409f29dda4774f52. 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/GBAJH0600601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c64ddd0f709c69a8fe09d3cd766667984a823cc2d1ba7d56d0502208932b781. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USF068925440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36db5a4c6cf3dfbd345c0a8bb07ffa02b62b7c0154c3e7d2d111ebef3b5b135e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BEN582300430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b92259ef6ea01f9e9746a6d79a6eacd9ed6f6723f54657662b03ae8c1a5968f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAHW0000195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c5234a9b353caffe097c56f9e879d3848e7033ced2ccd5eb6e07817e6f23d4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEA818500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f325c40e6613e2040dd317a756b8b88df3c6a9b3227e14f2aed3ede5528230f. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:09:04Z), 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/QM4TX2250160.
Modigliani (Lost In Your Eyes) - I Dream Of Jeanne Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733d6c986a68ac7c0a1e42324120db44e5f25a0576aadf1e0526527a8d5c4849. 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/USRE10100209.
Machina (feat. Mariana Saldaña) - Dark Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd000f050969d767d5f710a9d933a6ccbc82988f21ac488674c52555a2d5094db. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DED622200138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2939fbf885e3b8ef077ef818992b866cc24a125fd4e973b9a96004e969784758. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/UKXM42000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a07942866d1108e6881992aa06958321617bb8c43974ea0ecc87c4cb713af34. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEMM42101123.