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 0x49164367529382f7b11bf4635b52ba15cb44861db4684b3c24b332dd083b37f5. 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/79f7e32c-22af-4d9c-b63d-1146bdfbb846.json and https://artists.proofprofile.net/proofs/artist/79f7e32c-22af-4d9c-b63d-1146bdfbb846.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 0x83b5000bdda90dbe671653c1fb7d7df4c4c41a6b9de0b035255d2ed94bf3f728. 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/IL1042101021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdee4f4d996911e981acfa46e53fb7f554ab7c3cacd1605e501cbf93350b0a68. 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/IL1042101022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5198ee0e7f41e0809aaab9d7f45779f52ad4efe5f9f46c5a7d7beaf6919c6799. 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/IL1042101023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2462906076bdb3f3744001853786a8056340943ac755c9c21cee4e0f72a73b9a. 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/IL1042101024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582a33e525cc53cc19492cb8c731ca43af485368c979e3199185457d49d87573. 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/IL1042101025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe930d28a00ed8cb865d4289247ac016959a68c1fda36d40adb41124d101fc72a. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T09:53:01Z), 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/IL1042101026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cca862a10597e6bda3607a7778d2a960c72368cbd758e25aa00caba1e61d56d. 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/IL1042101027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1be8c18e7dd6917bc4cdf92429154578dae870fb34155a660864dc8b73d10f. 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/IL1042101028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefce16cca4affcd76d04b76efaccef88e5b5d2bec92fe53d6de007169f8a5767. 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/IL1042101029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd046a05c6817b801bd437e195513e8ace5e3dfd7405cd311c66f2aefdfb6b6f8. 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/IL1042101031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b9e2cf2bbb85e3073cd98b020fbc578d30b6078047e80f0b950710bb490c74. 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/IL1042101001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4837e44ae8df7c14c13785bb81bb40a5d0fa689b6d8b6c1c66c893583c81c5e8. 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/IL1042101002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9897cb0f43b92f88ca4240b9abeb3fdace1f9ac574d4732aa0f88cc185e5873. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:37Z), 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/IL1042101006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc03cca2d3c3d9060a7ea998c46940518ba69b2514de9a9ca08d9dfe2415cf2. 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/IL1042101009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd4b707807a697d6e4735d093ebea38ed2e47d71e99aa282a295cf55b471191. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:59:25Z), 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/IL1042101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1df65fee0946217cd073281931d34d724f81ce05e8e11188db4ffcc4038f58. 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/IL1042101041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf345cd1b1620025155021d8e196a0c16c8a73dc5bd585b7190ff6210b301c0a3. 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/IL1042101043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758ebbc96295732bc9a5ef00130b51048c8e2e9f23b7f656b3bbc08f940e2ea1. 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/IL1042101045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdbda850296209a4c36e904a7010df6df1af0c8321bf0c51ae788971e98c9ee. 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/IL1042101048.