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 0xa0101feb616743b15c2340ca445bfac9b75080dc76167ef8979aea89a137b7d1. 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/ddcd20a9-3e9a-436b-bba6-22f31420a10e.json and https://artists.proofprofile.net/proofs/artist/ddcd20a9-3e9a-436b-bba6-22f31420a10e.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 0xbecf3d9ba07beff0d85e3db5d80f4d1dfae399196d148b361f999e123adc4c3f. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/HKC992425304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7673cb33943608aa38f6b12b2c58119478189617d05f86e84f0f9c77c786bf3c. 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/FR59R2457705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1292c07942b67defa05400a8fb4c71afb9a506882f588df08acbb54d4a400b. 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/HKG731681842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002d5bae06f4fad212bd92b29c10bee2ae66d58eb36c827a68490f52da84b1b1. 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/FR10S2437156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296d1996d8b8684c99135c926a869e7825634122ab52cf145de994c8e2db09fc. 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/DGA0R2303659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91860afb60eef8bc1479fa92e6e3fe997ed1a8d5c8f43fc7b3f73169ec81f4f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HKG732422029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7be52009e9ae866bc051edcaeb661fcf07d02b29101550a53562b6eeaef96e. 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/TWDL72307093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20815ac46dd536e52c2833f15df9e6de5c4fc1fd95e53fe9e2f1c536ddbcc641. 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/DGA082336801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d5318e8a6a96f4f144c0e56bda3d6a706652cf1156a3f5d88f62631c24b5cd. 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/HKG732322350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eaf6b42b302cbbe3de86a96990ba56a69fc97aaa0b4ddef2284250d4eb1855c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HKG732305652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3d9e84e1b436c5232ab864d80ac7a861b3e64c4586c5ef2cb4e49e1a2ee7ae. 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/CNZ632201587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdf8c1b5bbb4e78135d4a5c6e93a0128fe69d1647568616feae7de56bbd5ff9. 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/HKG732290658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35895141d629134a2850f4928ac1e95f65e92d3f80f2eb781208a728f5ae5991. 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/HKG732279788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3a2067efad066615cce48165d23f1ef0057807c12771064110f121e18e6f9f. 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/HKG732262847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70c0bf7c75c23526580e11a1c324767ca1c584cc09e2b4594e9e836556cec1a. 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/KJMPF4786995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68e665617407107d81191d37037f80c857f7f650e850f8f1646d26af8c7570d. 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/QT3T42505211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8fd918438ce10d2eccae4e75c1689037944ec4d29f0126145c391bb2a5140e. 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/DGA0L2401003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ed47c18469f89d3a64454a68c66cd22499b4dd6f5cd5039d5b2ecaf1822f38. 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/HKD012367294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1292c07942b67defa05400a8fb4c71afb9a506882f588df08acbb54d4a400b. 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/HKG731681842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b915765a3f7d84a3f4f774150ec9ceadd730d32937e039c617f534e80b9ea7d. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/HKD012493113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72eedd00aa479623fc0a86b6a25c37ae344f0248c2b1f01e089bdcc64d3491ae. 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/HKG732365936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa4dc8ef5a5c2c87aee0ef77ebec7615e456ec9772032f863b92d2b199bdf74. 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/HKG732365937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a46ec3cd9911f3474638326b394b329533dfb9c8e10627e0d6cf17aed32f98. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKG731603126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e79bd74fab7dc0aebc3fadc1f4c16665988aadaec0987baf25bf4729c6c7c8. 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/HKD012376657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66ee6d00ab82b7ea41ec568ef8dfa270ce31cb7857d4d79b225ae44a1127aeb. 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/HKG732322452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632459e2f7d4db17ed23384e517dad4c40702f2a9622b86bc0e7205937afbf26. 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/HKG732305665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eaf6b42b302cbbe3de86a96990ba56a69fc97aaa0b4ddef2284250d4eb1855c. 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/HKG732305652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c4a77a2570f965a75da83f7a3f15e60dc8fb424aa40ea39b2abfafe2461cd0. 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/HKG732293413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdf8c1b5bbb4e78135d4a5c6e93a0128fe69d1647568616feae7de56bbd5ff9. 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/HKG732290658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4001ed713fb2f801f9dd7e805bf58b6fe0d855d56a5495842e07cb1e6949600. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HKG732279728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c3f61e823ff7744bc3e87fb03e734d8f050ac796c54c22e56f2164872ee7fd. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/HKG732273053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3a2067efad066615cce48165d23f1ef0057807c12771064110f121e18e6f9f. 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/HKG732262847.