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 0xd375e8979fd0ec594af881b8ce7ee31e0cfe2a2c7675fd9e4e8050e38bfde723. 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/193a81ff-68dd-4012-aaf2-027d15c60b75.json and https://artists.proofprofile.net/proofs/artist/193a81ff-68dd-4012-aaf2-027d15c60b75.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 0x5cb430bc2e0bdf7af273c62833b6ef0bc65377722670ef1b641594533b9200dc. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/ARM8E1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37670735a153a8e86666df1a4780146ada997701622840fb73639ba923271e0f. 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/ARM8E1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d20e64c5bdcc678e2bcc30f5d342c7c640ccfbf4242a88966af42a4a6b67ee. 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/ARM8E1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16d8fde8c0d18c4e94c55a53d029bf8ce0fbaeb1b3013a54fc97665b5b9f8de. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/ARM8E2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2568a8dfc8c7df1aed8fea3fd96677d580306cea847e9c88bc71c685a555da0. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/ARM8E2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8004e1db7536364ad2bfbba331053f3c2e4929db50d6117a29f7c658295a16dd. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/ARM8E2200002.
Nada Nos Podrá Vencer (feat. Chelo Zimbabwe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ac23ebd4bcdb2b7ab6538c16437ffdd14a2970ec7716e35e44bfab9f7e96e7. 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/ARM8E2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0857d4464426cde5e1255f67145f36dd47a164f759588bb5ff3b4af350947d. 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/ARM8E2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81440732861021864104f03ccf3539b2535fc29c798e2674affb4cd61d733eb8. 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/ARM8E2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5adb770aa25bbbc76680bbfe8639dfbaff87b689a1c75c6de084b233faa1b2. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/ARM8E2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3e1ef87cf1217e5de31dd1933fc42f861da686e132d3039b08d8cfb1aaaf5f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRIQY2300001.