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 0xea9b10919c8f7ae2f0fb8f4ad395a3711e14e089e61330dde95656d5b1832f59. 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/04e32f41-a9bc-4116-95d3-c695d443aeed.json and https://artists.proofprofile.net/proofs/artist/04e32f41-a9bc-4116-95d3-c695d443aeed.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8834f8e0242fa54cf620f8653c1f441317a239034b7dd26b5d46a9ea1c74f93e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:19:49Z), 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/QM6P41902133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cd44743fd0135e803f35ced3d9f67b5bc635a210269a61f8362523dbcbcf56. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6P41902134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e02b3af200dba200fe8cec94b4a18afc8ea1fe090fba29e6db783bd40611b4. 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/QM6P41902136.
Selección: Clavelito, Hoy Estoy Aquí, Me Voy Me Voy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d56c4bdff3e075d265ee892b1e7c75a071603c935471aa1597ba86f06f3db95. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:04:26Z), 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/QM6P41902142.
Selección: Tarijeñita, Cuando Me Vaya Cuando Me Ausente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b55d054e6d495156e858d255bf9c1a4d3806ee3f49e3e0d89060f99839d940. Chain 2 (Bitcoin): anchored in block 957629 (2026-07-11T23:44:46Z), 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/QM6P41902145.
Selección: Has Visto Morir el Sol, al Ausentarme de Tí
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4f1df306d60877ad299a4d87bfe89520dcd7522dacf93a8e43ed61f862b950. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6P41902151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12304aa35dee2b62a9d69d370de07f4695c600eb6d016ba5e766cbecc8bf6e5b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:45:52Z), 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/QMFMG1585898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2a91924fd82fea87e1e4287b441c8dbc15722f16b37d9202b9fccb763c0265. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM6MZ1961667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71abcfa5412188277dab763664bbe90c2b5614f9a6d385a2a9eb3e968d5ae0b. Chain 2 (Bitcoin): anchored in block 957633 (2026-07-12T00:19:47Z), 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/QM6MZ1961787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b77d03232beaedd392610383e9a13cfef397ecb9b9a0070d1d8cd056f59372. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM6MZ1945873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ec4fa30e3d106fc75b71f8000b6b485742772b1913c8ba652c05b4897e60c3. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QM6MZ1945882.