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 0x5d50178f38dc4fb0ec9f3c8044dc1fb00574a779160b67c92c36667c039f7bb1. 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/dd39caf1-a543-422f-9202-9ec210da92f5.json and https://artists.proofprofile.net/proofs/artist/dd39caf1-a543-422f-9202-9ec210da92f5.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 0x4857d973cc57afe21d1e1e76e6be63647c9b4940378d1afebe70b234f784566a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZGLS2086034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe620122b669e12352b5f73cbede93941cb6d3da6df4fc59285f68ea9232ba4b0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNJX2136810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5b9c7ab3657ca34d07d3d06b33b6af0e74b812d4f6fbe95635e31a2083b50f. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZNJX2136812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9415a77f0777f428ddf254c2a5f003eba5e0033930ed03b7836b59ea8d1ca8d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZNJX2136814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0362a014f943271110aaf18a8a4aa62731c594f3ef705d564dc66f79c379643. 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/QZNJX2136815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac80107393b40313e868e682df7f0b95c8d247fc3757f1196c32f7bd636f431. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:59:29Z), 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/QZNJX2136819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e95aee2bcb7ca84ad88d438ae10c0b80fb2c3fe881ab2c156f43411f52a9b9f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZGLM2249270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf7d12114fac21e5c6b5d687f55e96f6f8b5b02755100cb1716f9b6ff519bfd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNJZ2123165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4857d973cc57afe21d1e1e76e6be63647c9b4940378d1afebe70b234f784566a. 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/QZGLS2086034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c6633a90440a6af71415429e52de6bcaa85d4bcade75f94c7e56195e1083a7. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/AEA2Z2489315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab73acbc2c639abe74a9611381d1fabe96288069c841a791335e869069c99b1. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/AEA2Z2489317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c6633a90440a6af71415429e52de6bcaa85d4bcade75f94c7e56195e1083a7. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/AEA2Z2489315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab73acbc2c639abe74a9611381d1fabe96288069c841a791335e869069c99b1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/AEA2Z2489317.