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 0xd5d40d517742a0205021bb83297b8c9727be8a8ce4bc3ed72d4e02b82201d168. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d87abf8c-0a83-4dae-98b1-90544942dcc8.json and https://artists.proofprofile.net/proofs/artist/d87abf8c-0a83-4dae-98b1-90544942dcc8.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 0x3eb0b083fe2cafd08de6d099c1a4f5af320df98bfddf0ee0f57c00d61fc20260. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QMFME2316696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe328e530fd2e8dc0671e5dfdf62064b0c22adcb2f794277c48932a51019eb352. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QMDA72416163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91b073a3c813affdd80b239fd9aa35d30a434a379dffbd0e63d732eeee12899. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QM6P42581834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fe6df7bd2c11e02a6b32f61d110e6daaa355eba65fd9ca9741a7c7b0d040f4. 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/QMFME2515551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7086335179769f9c91381f35666d21364574b1876cd727e4f24d754503168c87. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:56:21Z), 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/QMDA62571688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91b073a3c813affdd80b239fd9aa35d30a434a379dffbd0e63d732eeee12899. 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/QM6P42581834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3487ead24cf8889ccd9049d60739cd5e5a6c6db13d3fce4d7ba8c7813b4d713. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:51:28Z), 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/QMFMF2454197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe328e530fd2e8dc0671e5dfdf62064b0c22adcb2f794277c48932a51019eb352. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:35:31Z), 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/QMDA72416163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedceacb5eff3c5f3435a4cb777705b98e26b36a26448482b5fe8adc546810d07. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:48:18Z), 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/QMFME2515573.