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 0xb8c1bbe2fd588f207c0925aac0eca33bcb792038d95acc79f0bf39addbd3c336. 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/12f99d2b-f380-4030-aba8-d2e098a8719e.json and https://artists.proofprofile.net/proofs/artist/12f99d2b-f380-4030-aba8-d2e098a8719e.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 0xe2c4f83dbb26ee755360726cb1338c73827745942842b4aedcf75ac4bf1b4c9e. 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/FRX202266363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ab9c207463f9b6f21a0060ca9131ee599c8f1c5792a5dad7b32518746c3551. 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/FR2X42463253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2c5cd92bdba4ee41e8a7cec4173c68aa86612286e95918030aeb13931ab618. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR2X42463255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d79afbe6523d31f47760df3d3fc59d4c09ff60bac1391760eedc4dc42c2cd6. 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/FR2X42463257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf9c5f78fc87473929169d2534e3a78b29ed8173e349d94d839ab99e2a83cb2. 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/FR2X42463260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b6cc962b3ef635491a58e16559af09790d888beeafd8b6cf9d4ae3a43e7413. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA082230823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64f50083bce91e9d110418f240073bb0e27476660d9cc5918aea60b73f4d2a5. 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/FR2X42463262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7d450bbaa918891feace0cafdd032c7d78699043cbad145120a9db4688f0b0. 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/FR2X42463264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5aceb0e73507bdd16716d3f998efc5fe5e74431a999b42c1d51b12be539ed6f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX872343904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5853f4696c37de862ada565188a0b2eed5d7a9a0094da91ef5272e9ff790dfdf. 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/FR2X42463266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5aceb0e73507bdd16716d3f998efc5fe5e74431a999b42c1d51b12be539ed6f. 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/FRX872343904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b6cc962b3ef635491a58e16559af09790d888beeafd8b6cf9d4ae3a43e7413. 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/DGA082230823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c4f83dbb26ee755360726cb1338c73827745942842b4aedcf75ac4bf1b4c9e. 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/FRX202266363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6a12f06135592340e2acfe949c66caf7caa493cde1ee500444972fd2830d2a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR2X42129891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1b93788a2477176c684f335592c5e9d2aae85f97a54322d411adbb3beff90d. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/IDA142002206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1a02bcceab71829eec04d41f98ddd70e8486b20c880b39b7fcfa100cd09bc7. 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/IDA142002207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdc0720a4297b7b4757adca5435a5f4fabb1fa712fca25d0137cccacc31044a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/IDA142002208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8165f346442def125010e4cc68ef43877c48a3802dccee2155f7ca3f48857e0c. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/IDA142002209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdc19cce003434725a09b24ac552ccd03aaecb49727fefadd85dd2f9bc60fce. 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/IDA142002210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33c4bdeea1e47e263aae3cd56f739f2e9a41ea4cc79d5a6dd26d17164ea216b. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/IDA142002211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314a1c4127eebc0fe75941ee3f5faa74915c15492b98c61e725e9fa1f4557315. 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/IDA142000590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8101ee3b5f1739659c2aa72ec92500c8d774bc384a990d39dfef9da125d40f47. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IDA141903074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa09c344dc31843d0fc5db5feea688b54a0e52ef3cd0407823b76e179915278. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IDA141902339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c253f1f085aec9c037211e7a960d287876844e7d6ec878e4ab8644e15ada05. 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/FRX452137172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa06a726c98317220f392f8cb7defe7604631e58c8853656106b698ac0b99b1. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FRX452137173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6148fbf29c4aab185bcdc0c3b14353edb50bd156899854f027c9f2e6e05e3141. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX452137175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43a4ac68fe8ee97ceaf4f6bc1ed553f5af017c9ad0be1307f5b1814a21fdb86. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRX452137176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c6299a48a915d8f66e5fa3a8e840bdc8ef1914f3ad9fe3cba6b3f4382d4be8. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FRX452137179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe255e7d78366dd0a801b8220c7b27bf53cabb7dabac57826292d035930cc6e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX452137180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f9a5e0abb23cc7143de8a1f401c2c052e4db65a188399ef0b98e83f5d07f66. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US3DF1970158.