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 0xc2adaaa48413d5cd53132aa3fec7f3387512653a56053f854c8d6c95c40078d3. 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/d1d1256a-3246-41ab-b935-50af87a5a7e7.json and https://artists.proofprofile.net/proofs/artist/d1d1256a-3246-41ab-b935-50af87a5a7e7.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 0x57ad80eabe0a71c87209cb06b3d65ab65635846b354e3613e023978914f76b79. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAHH2314606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa12f45dd07b30c7e5b4001c5366ac47f6c6764cd9eaf1744e845cee7161f13c. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/TCAHH2314634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68698f290b6c68750f9519c90b468e169c88878c558cdf330c762ac7ba557e58. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAHH2314643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6b532593a58c53f6a12da7f0e90a9ed2b27b99889b563745370ef33749ef1e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAHH2314663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ae8e641672240858193fc39b60bbeb27b2f106ff7c5e74243c94486316f6bf. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAHH2314671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0651dbfa119b2553be9caf45b9b5cd81976e95cdaa8f90d7a0b99e58739d3a4d. 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/TCAHH2314678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c7aab7e684fb37ac4315b6c24608aec64cd82f63ef3fff2cd449a7499d8303. 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/TCAHH2314687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4373659b9fa47ffafc3c951a170b9b5a34256eb134bf8d365ed796f211b95627. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHH2314700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3782023a8369e1ce602065e2d7521640efe56b92237f5fe7f178ad89388c61. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAHI2369735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecd423efca511f622d32a885e857002abfdeb8720724bacd1d4241a7fdd9d02. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCAHI2369756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24b0c71225d58b926b1bdc09c46f722235d1739b691f8fb3f8b4a8b3732a645. 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/TCAHI2369790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c6277515856da1ba12272984763a3ef936e2ec7783f6814141b9150dc66e51. 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/TCAHI2369798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989f6939be250c26f7546066b87846fb18c686113b625379475825080ec5ec84. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAHI2369945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b2d91174db031cb2137e87b214532ba88b21548c88aef183708c395987f05e. 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/TCAHI2369963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3aafabde6b48ca5ea0c207fc1305c78dd7044c053c309351006625ea07718b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAHI2369974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8baa4317cdff8789cae82ab00eac3cab20ee3d6cf97d3d32804b066c3ec232. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAHI2373805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4272c1e36062811d0ce0855bd359f87d511e198121aaddc03aebc03ca1311bcb. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCAHJ2338917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e2bfe89af974e32d4b72442eec7e7bd21393c85a7151e9fef4d10c915fe30e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHJ2338932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584ecd22f797c32c99df666e593b9aff378cb9b73c0bedebed61a3d2165539fc. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAHJ2338956.
Seperti Yang Kau Ingini (Instrument Gitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ca75984a13b90a11de86930ebcbd4a88aaedac0307d1746d22674d1d58a0cc. 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/TCAHJ2338963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152a41e33459d318489bfa03227d5260b726908788966174e653da4e415c229d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAHJ2338982.
Tuhan Kau Gembala Kami (Instrument Gitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6dd98cbf0a61fbf5c552ce23b6eb608c4db685099a65513aa05cf7bca1dee2. 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/TCAHJ2338987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471f19d4a6e4842e056c67ecef62dc112e24bf752a1663e1284e1989d4dadda8. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAHR2352033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9e5f8d4712e7221c256fdea9d0761906ea6b536393b3e483fe75ff740a1a36. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAHR2352063.
Nothing Gonna Change (Guitar Instrument)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b2bf0fb70e96430ac31776bc2e3e32f7443c01a192bbbfb517dde02ef53624. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCAHL2384376.
Flying Deep in the Night (Guitar Instrument)