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 0xce1c73861bf04c58702699bd3ef1c2e4504263413d7b64dedb2a2959a3933049. 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/ee5257b2-eba0-4c34-be64-0709b6a6743e.json and https://artists.proofprofile.net/proofs/artist/ee5257b2-eba0-4c34-be64-0709b6a6743e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Super Éxitos de la Música Infantil: Baila y Canta Juegos y Canciones Infantiles para Niños
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 0xe7d310766d40990fb6b6be6fffbbb15c9bad71514a13f7e58c41c8ea8bfb6846. 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/ES03S1501177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61173455b5e0757f057a8ecaf46561eb02df73a100d6ea4113cb3f68f83e9b04. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/ES03S1501180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa460e957d6a35315028e7093166683047e14cfb0bdf52a38edf45ead0ec1a808. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/ES03S1501181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3fcc704ded84975c2fc57846a6b563c2360ad4942f31c0209279d63b314c6a. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/ES03S1501182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4272c36643bf392987d9fea28386ad4befd0e333c2cd7ce1728d566d1e36585b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES03S1501184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28d767140116814e80f0952b8dd1a9869a60a0eee4277d2d56a35e766298667. 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/ES03S1501185.
Estaba el Señor Don Gato Sentadito en Su Tejado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f947932835858ee07ab6a957ed4805b5e415b8ffa070be28570ef1194682fa3. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/ES03S1501186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039ea008c572970c182d73f829e90da8a6b31c19a0ba56b6419b7c41ac183eee. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES03S1501188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c955d9b634e87db7e1228a4b7c4c6d2782471541338d054ebda7f8768ddef8. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ES03S1501190.