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 0x45409a0132d6f510105649822fa758f6517db4a7f974e354cd8a559659d0c0b2. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acfd5328-9969-4875-9336-527209dbcde0.json and https://artists.proofprofile.net/proofs/artist/acfd5328-9969-4875-9336-527209dbcde0.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 0xe4ce814e551d94ad4d4f420a2316b68c7f5baafaa119202959a34858f2badea9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPZ921606396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb22b24e9db32df8ff299f5792af0001aa2cea6614d14521735f9321f811b82. 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/JPZ921511837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54af1fa46b7bc598cf5766bdb1bfdc0bb4a42a7dceb4200bc1e0a38df50b4aac. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/JPZ921504954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46f5d89ffd5fd9842c9b164aeac1be0e7ff64cacf207184362cd547a2acbe3d. 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/JPZ921504955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024f654e20d3ec47e0ddf768afc655300a00b677b5c725c84d93e355481476a5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPZ921504957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2fa64e73c49cb4b968ad2c67596324f7792d4998653d7c0258a53ff9ff013a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JPZ921504958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0867248e4c981b02553f195d3f706ffc735f47ac2a0f8209952f68d957c78cb. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/JPZ921504961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ce814e551d94ad4d4f420a2316b68c7f5baafaa119202959a34858f2badea9. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JPZ921606396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa326bd555932d304aab7657c67afc6253901817845fa0adab45e60b04553a991. 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/JPTK01206330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b42e0b5e5462e570e2b6cd2f02157b48b7db299ca7c42d945817c984a016f7. 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/JPTK01206340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45dc5c30e4fa78ae68e52d43dac1af3f3207e05c6b6221fe6269236e9a034c57. 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/JPTK01206350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0739b8b13ce57d1ebf73f9d4dde6570c1bfa912cd0113c66f72095ac147d1b8. 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/JPTK01206360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8034f839fe7a712acc2fe5ef748f448dcd74ebf5d875392bcf21e08c86bc94. 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/JPTK01206370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac890742b39b46ec9f7d197796d422cd618b1b7a2bbbd73035a02a2c107d3248. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPTK01206380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709f6b68415b1839611394e7262adec4e16a4d78820b1e2110b00396241f0af3. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/JPTK01206390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0415316dd9f5da8f68b237d57a9dea64537f8a8eae2234519ee8018f14c0dac3. 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/JPTK01206400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8c2e990d6362e40d6da98f2136506a1924d0c8348f22d4dd0ef758cadfaa51. 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/JPTK01206410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eea9ff43353f5319a384c85dbc2cb3f6d2fdcb1dfe78bcdef58b59d49fff2fe. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/JPTK01206420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dac231c81c04fc2e0090dc22f7c493433118693334567e248b547135523685. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/JPTK01206430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6000745d541bc6b40b2bc5367d09fd6cb97484ba1c2adeb49eb2725192ad86d4. 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/JPTK01206440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571c69436847deffba6c04942148456f5c6bf4d8760f2589339b160ceb0101b4. 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/JPTK01206450.