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 0xe9fa1a5a5e68bd9fedf5dc67de8134f46bc6e96711fd875c7f1343063c88278c. 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/a3715b43-81e1-42c5-adba-a6ca872c5be4.json and https://artists.proofprofile.net/proofs/artist/a3715b43-81e1-42c5-adba-a6ca872c5be4.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 0xf42de3ac889d72d9f6175874e21d79e94cb8b7852fcd860823a0113e81e80bbf. 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/JPTF00703101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdc33cd3405232a1e99196495e9d4128884161802614f210cf7e97c6b57aef8. 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/JPTF00712001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d10bebbe762b088489eb75f0c06d95a659f665a8597d2492fcb5c4e29950872. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/JPPO02001213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8b4b69845fb8226c6a7020a65da5f7f532b3f80c0ab86a2004be5111413175. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPTF01215601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c1aa1663d38046720af7d24f3dd7ecfe9363a7ac1620b872d4be1654d11c45. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPPO01904984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc1f07556dfb7e88024fcbcd1efe580177e4c408b077cea3576d0c23c8ca0a5. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/JPTF01208201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4551b40e7e2178cf5ff14b9e3feea0f0ab9e80831166ab37ccdcae94444b4d5. 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/JPTF01501405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedd9bb72d64b366d5db46fa0869e1a4ae076c22e40b9db8bc4684de8da07fa4. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/JPTF01507602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5c55c55df62ad79f625bd265e257971139e919b74ce54e1877bd80faee2f0c. 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/JPTF00506601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1017f3b79ba7f961b88e465b41504d60241cec2be37e2aeaa6dfdeebebe073f. 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/JPPO02202314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0657d38f2b903d1d33da579079954014d326766ef7abbaa4b265767e89efb5e. 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/JPTF00805101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa035de3e483427ff5b69c6c449d7bff12efeeda2d200fbdca439bdf59749aa01. 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/JPTF00901901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcef31120091722eb42f4a21e2876de9c54fae4179bf378e94f441c616d54315. 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/JPTF01810603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb618709309b4d786d32a5b68becef3acbc6178db0fdf7c4c3812ec71c7d766b5. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/JPTF01507606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b7b66033765cf3bd1945ddcdd927e37ef6b1fa58c1a1846d573b8208137637. 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/JPTF00603610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba6e337b4dc532ea2ca21d9a606833e1eb248931bc6bb4c33bd77d2dedc95df. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JPTF01208203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72143a77f7d416a07c95c584a76725d122240b3b4671be5c605ab2546425c8bc. 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/JPPO02105127.