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 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 0xcf7f3d69c758899fc68f74d07e36fbd08da24aa5f334c4067c58178bbd8d2c77. 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/db2fe7f5-58c3-47d3-b80e-cc4eb413b469.json and https://artists.proofprofile.net/proofs/artist/db2fe7f5-58c3-47d3-b80e-cc4eb413b469.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 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 0x4d5215a42ba7114a66b51a5c0be6237d5039b0c95f50bd146e2b11980f2c8df6. 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/FR6V80818695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ebdc5dc5ec69aa5f00d32f35e7b2b0a59f70a17f25ebb115bfab0bcd323ed8. 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/FR6V80818696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc9b0561ec5973bb78df61c05b14a977d3e3b93edf5c9f5c7b4bc4a7e5ff038. 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/FR6V80818697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5772bc8a4c503665a93ff43eec5eecd8398991f628918c8af53da58cad0fd7. 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/FR6V80818699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2a3347843be637ce8ef39f9b3c2022c0f687d36b7960569de89e96f2bad8e1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR6V80818700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438242701e728fbd65e7d213de801d05bbdb8f4dd964b22ad71cf0dc915e9bb9. 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/FR6V80818705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553e51a9a0618fe18bc061b6de556cbc5d03a0ec2e0329032e700a9657bbbdde. 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/FR6V80818707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd901c87e60f8ad686aa2ff9e81010b62d5a737e83d2c76f516d9450ad7b9dd31. 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/FR6V80818708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc944ff275de71c5bd46ac226c507431f0a12256ea5d3413f0ff390836f4eff0d. 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/FR6V80818710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf9784338a66bdc0631bd9e4d7de97a270231e5f28cbbc82a3dcf9009b8c6b6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR6V80820313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f7170fe8d9776b651755e06742682516d6573a4289de383bebab9a39c45fd8. 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/DEBL60933348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0507fbb844a1f97c510f96627c292a36c10a3df9a946c486f4a07a51602b3fe8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR6V80377460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b909721c58e8d459691935ae86af7d5ea34d07e00d2b35a4bae8e2b44b5e1e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR6V80377461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66eba56b436f48beaf536ea75a9ace8cd75bec1375fdf198c741bcd16f12069d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR6V80377464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62167e6f9717316d13655d0c8fb66a851c19907b03289d1e4f8a2e42862b3e2b. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:02:48Z), 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/FR6V80377471.
Chicano Rap's Best Productions (El Bandido)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee41dd82cd0041ee29e998b6a846ed94609febafcff9893f4675931e01e74f8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR2X42051418.
Long Beach in Tha House (Tha Blue Print)
They Wanna Kill Gangsta Rap (Tha Blue Print)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89dc181ad1329849a14a90b658ce8dd26e1ebbb445b21b7a623b6fe9e1c019a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR96X2136425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21ca6e80bade431fc6baedf95f065d31d258b2f9151ce2fc76fd57193db42ce. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX762170928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9924a74bc51cf20d8ea05369817d24fa6890ec6752b149caa413c7c54e59dc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRS182136823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204c41d97054fcbad9568c18cd2eb4fa44a7bed60a59db50ef315554665bde9f. 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/DGA092225483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5edf8f78513dacc89e6bcfa8c6ab4a770b124d6e7078937695c89a5113b898. 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/QZWDW2471814.