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 0xc2595adff967bea9fbfba26d2bc70c0a4116a1a91d8ea022fbccd241aa742ad3. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4cef7ff-ec69-4083-9ec9-de93b45076ef.json and https://artists.proofprofile.net/proofs/artist/e4cef7ff-ec69-4083-9ec9-de93b45076ef.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 0x74972a9421271e4dc6e117524e495ff984695ac2cd6a686bd7b3a98e4a539622. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ES7312300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6b311a89795df66882d0e610f171ef1c201050a0e504019dc7e93110e8cabd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES7312300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a8942b45adbba993715a7bc6f49b9d99940863185c93251244860ffdb90c20. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES7312300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfe9d2aa05dab13fdaf7ed61f80c0c2e6038827ef9d4bbfb59a7f39685bae48. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ES7312300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da2599f5b6b65954ab0af500714fa352bc151c367023bc0b41a8d15027311bc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES7310600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348a8f389a8058c4e0efee76649fe967106ad5654b13b401d72b74463c992b9f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES7310600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44774d65cee3fa83174f24c078652011d20fdac2c7eed191888a76fd42c6976. 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/ES7310600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cdbfa6803245fd4abe6771262322d681df38f303a9ab2aa3531adfbb73a111. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ES7310600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c7a11b2fb9f9db9ce2b0b4d59346b635b18aba08dfe4528185818005ab7711. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES7310600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223a94286490cb898f3b9111a533cffa3a6fb8dfa3558c956aac898d1c6cad26. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ES6720400443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650d970b739d7efd9d307e72cf01b4a1ad68c91af37b6db38967ffe67cc5c2f0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES6720400444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfdc96d5bf880a3128eeb0b009f026fb2f2d40567cb17aba1749e0abf9954a0. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ES6720400450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca36078395a7cec79159557af7e5e49170f388f608354a6fd0b695a3efddc9e. 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/ES6720100229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0697e09c38043e076b5b2410c455815bd1abb8daf893e226a64fd7d2750f8a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/ES6720100233.
Cumbia Jungla Sonora - Makala Original Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d33225911f79722ef55d710ee87896f397960fcdd5382dde50735f62b0cf4e3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLV61409978.