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 0x1e1eb2adc3a6337e93aeef023838372b0353f22de8693b2407b339522e236162. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57de33ab-176c-48f1-b377-c6a88f4e80e0.json and https://artists.proofprofile.net/proofs/artist/57de33ab-176c-48f1-b377-c6a88f4e80e0.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 0xee6800d6f393b41c86772f04906ac3f9874da25f5f721209e880d3e5abff8abe. 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/QZHN52462482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f1d7cd686982b25c8df55fc76dcd6c07f8c56d64dd316c0521094c69c2ca77. 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/QZHN52462483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f0125d294b90eecf31221a56f374c4ce6aa49c1f18a4c59000b479a803ee7f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN52462484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54f6045c6f849cb8c8c56d0f31246f0f2312f33ec1afde4da14cc22758bd284. 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/QZES52435128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93369319e650d30973dae948666a94b0647c89a8a64918f5482042b7da454386. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTAZ2390283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d3e1080baec1a11a2a7a8300a7bf9b2dabc1663fbad855efd2aad66a8bb322. 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/QZNWS2391932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a313be320882960a3601dfffdfbe9a7b89dc8e3f49fd0def7421514d9832923. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZRP42204391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82554c32f0e31664808e76fdd89696172330adfd2c8354ec52d352c678f94d5a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA62230168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c13b09452a924525a82cac1b1aff1dcf74bc67b62801ccadaaa4607f63994ef. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDA62267375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a0683283db35c9bd47eb432440ecd586ec12aca643831325661cf360d3d60b. 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/QZDA62267376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82554c32f0e31664808e76fdd89696172330adfd2c8354ec52d352c678f94d5a. 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/QZDA62230168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f725da016f6ac996ac56a0e557b5ff3600d176f174f3b39ff7d9f5271a44bb. 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/QZZ7K2523924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823ed4c3d1714e813db2f74767700daa488c69738dc7430416a27a7240decbc2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN52545450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a717dd4a1df8da3582e57deff7c84878da2b573b86816bcafd0fe16182c8b21. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN92531987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a717dd4a1df8da3582e57deff7c84878da2b573b86816bcafd0fe16182c8b21. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN92531987.