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 0x4b0514bd6e8d3c081af7bc981938d7de79a0b496b6b473a20ab9ddf99151d22c. 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/91092db0-6757-431d-84b9-825b9fbb3f1b.json and https://artists.proofprofile.net/proofs/artist/91092db0-6757-431d-84b9-825b9fbb3f1b.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 0x94f6b70183d51010cff079300060e1fa98a6a77b895ec24c4611e0fc523dedd9. 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/USL4R1930809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930f7f70101d6312e573af8914c417c0b5ce690405849e3af737777fafbc6eca. 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/USL4R1930810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6d251d27d4c229db249311a7ac1b845a685591c25bd686cf1010f2c19fa88a. 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/USL4R1930811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e36829f6c69fedb0c3c4d43bc6ede0595a48564bf96c74e8056bac8c0e0366. 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/USL4R1930812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734d08da608c16319f7b8964d92514d124b6f11026a527c5c0260c1f0bc2f989. 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/USL4R1930813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfddb801cf182c69e310d72e8419123c69c0df32903c45192c013436493eb28e. 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/USL4R1930814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72224dd42199c5d28161ba5b2ecaba05508cbf2ffdfdbe8298978c8607213cc. 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/USL4R1930815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9a10967f241e2ad1f8acc78c5c1bbeefe55c1e9ff2cb6e718020cc2a41237b. 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/USL4R1930816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19063df5a10d8758ea12f76de5aece81125f335245851321a9966b755e5fd803. 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/USL4R1930817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e97ef7f1834a8684c39bcef26dacde97e76d3cd3d0b072da1625c586b009851. 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/USL4R1930818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d88bd2703d42d02d86a7a3924280f66a9b292a5409ba4bbc490a530cf996b7. 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/USL4R1930819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84d5764f5d0480795337e53564542b5dee30e38b45a502583db8f68ab327f24. 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/USL4R1930820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb987276b0ae0eb054e71090a4da905dcbd72f0fd8a5eaddac8c2a7c4ec004d3e. 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/USL4R1930821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb505308b31e959f8d2465a4f1ddc8a4f4c63d23f5390ffac56eb00636b5f8b. 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/USL4R1930822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f2ffdaf3b2e789dc347fa065bf6a7fc076ac6a3c803a07b4ec7b4fe4b2bceb. 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/USL4R1930823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a42fb9d79e06357e0011873477aff20ec70da78b9f462454cdd8a276d2a042. 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/USL4R1930824.
Aquí Murió el Payaso (Versos Desdibujados)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371a8d0ca8009ceef06feea57bc9264bf7624a9a975a7909ccdeb50594003e45. 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/MX2832471714.