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 0xd64404fc75c438e89fc5b1f1e17736930dfb168d75b2e6bec1ec2a257a45c6e4. 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/ad571818-b8ac-484d-a54e-a1aa2d315aee.json and https://artists.proofprofile.net/proofs/artist/ad571818-b8ac-484d-a54e-a1aa2d315aee.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 0xb2203b3e3b2ad487051b26255a2efd04627b75a6845d7d1024c75403d7ad593d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62163602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdde1cfbc3f8069f21c277ebf439f8349fad5bf803c4c73d095a5bd8b6afa895. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2407233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64029afb18fbfa0c83c66d232e6726bf630b62ef869fe57b69976cd516bc66ed. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2411558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c25325f3db10c23a2625f8beb7dfbd81b56251cfee5e5d1938e5c54b02e5a7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3DF2401113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9b4566fd48888505da315eea7f6dead9aafb919e801993cc425555ee925e35. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USQX92401209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86d2b83db89f78df55277de261de4c873c259101f3bff5f8a6c3a8367bf433f. 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/QZ9QQ2300985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e06078384f8b723be7553e245a2d34092e8853b14a7d3ef7b73d770e96f564. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2322031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0236959a2c5d7cab0addc70e198a83fba5f8321455b2ab45ae75679f9da142f9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2317925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c732145b3c0ba04ea828408bb515a44851be6951b769c0f2834b24f36a80470. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2312880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a5ca9ea1e2835f0cfb78c60eba45c0c9244635c28779aed0e6acd7cf8db684. 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/QZTGS2200225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d7989239cc6acc5172570f750c767e609775b70be0e033008012716e0a2254. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZQMB2102927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0415d19af24e97ab47ba5b1ec87c71101d9ad69235f0bf2a91468deaf1221078. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDXS2201881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8f151ab1430edcc3aff6f33abb5daf888aabee422d8576c02d919ec32dcceb. 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/QZDQH2253331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f47da736f3c6ef47943d23a9940fbff91f5975c1a144db7cfa0a4ff29282e6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USWL12200233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff0dd43071bdc323009d22750233362b5355ba579b0cb1a47405d6309a801c6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDXS2200716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bfba59c520b32f6654419f6588cab89680a6f8175d591974ebe84d594f3e03. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDXS2104807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263a7843539657fef648aa035f1562b36286c2f8c2a0a81f0d0257d116786a71. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ9QQ2400089.