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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59b346a0b67fce582dba4b72b4c457cbaa6dc56d5646e91cd849c1af8bd5b75. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e88c6cc2-c8b2-49d5-8f21-2e97719d0955.json and https://artists.proofprofile.net/proofs/artist/e88c6cc2-c8b2-49d5-8f21-2e97719d0955.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vintage World Nº 50 - EPs Collectors "La Violetera" (Bolero)
Vintage World Nº 70 - EPs Collectors, "Exitos De Siempre"
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818d382b34a3e641905a0b6747ddc9bfa3abc093c5827987adf7c06f5c3d8139. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:23:22Z), 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/USV351311546.
ALBERTO DE LUQUE - FOREVER WORLD HITS (PARAGUAYAN)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ad1ebb03f7d2bd200960b98fe5a0d3b4d2942fd38b175df0d4ed9a8dc8baac. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES18B1805273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ede16f65d162ce4ce79c1678660e71dcfc3db066d335c0a13e1590759b1173. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:51:25Z), 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/ES18B1805275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ad087bfde67d121e1b838fbc4894fc6dcc3f16378c84ce1f98554f9d479490. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/ES18B1805276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87eaf6603d1a1d95959f7a3e4f8fc5d30aa464b128f5fa814f2d7357acb5913b. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:13:03Z), 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/ES18B1902269.
Homenaje á Alberto de Luque: Ritmos Latinos & Canciones Románticas
José Asunción Flores - Centenario del creador de la Guarania
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04aa427883d296254d06df4ac3c8de5f12d7b3aed50c2687eaf113dc0469178a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES18B1805603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d11a910396fd1f5636e7d830c8914341fe51c8437c6b003e94563bd04fa4614. 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/PYE762100489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f10f13a986942ad92ba39d6910af4f2521b530404a17c35a7eb0853f9e573ad. 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/ES18B1805593.
Paraguay - Sus mejores canciones e intérpretes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353348e34099a46fbc1b62386b17195d5e587c45a2b806496f82087964f8e525. 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/PYC842200957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9395e627f6169d58c308ff9a5b318d862c475acca737ed193318cd675838008b. 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/QZGLS2450007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34fc2371f9841600d75641a07cb65a19ea1c1db8713e36bd5301d1e6c8c52c3. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ES18B1805594.
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 0x66050c48f4bafc34063a2cfbe6686764fad2f9609c54b8dd6771059368997aae. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USCGH2135721.