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 0xcdeb5eeeb8e06919f8cb6f51c2fe8d255d8c9fccfff03f89803a3eba85c62297. Chain 2 (Bitcoin): anchored in block 954017 (2026-06-16T23:38:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3759d061-5924-4330-a5b0-33643e23df31.json and https://artists.proofprofile.net/proofs/artist/3759d061-5924-4330-a5b0-33643e23df31.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 0x1196ea5b8a5f3fd6d27191471ccd802423718e8bf6f852ad1e77ef7561b24553. 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/QM24S1844491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ceccd84df17c4d9e81417974c3604316445006f0ff2b29d168f42f065f05c8. 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/QM24S1844492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ee27b9403f19dcb8283604c903a0e90a3b947f48566abcb3cc239781a0d749. 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/QM24S1844497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc95d75635e373e9cc4d15a1da38c327bd4e17bb11c53ab65b0cf6f39c9eb70. 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/QM24S1923894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd342e8a53f77aa7eab13a387f2e4851476a10577ef9f47bf6a6a4ab072e86d7e. 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/QM24S1923898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442a03a851dc0613e92594a9a1c3facb49a388685f69607f3dcdf98a8452de2f. 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/QM24S1923907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc440cbe090fa791f948cb667972d3dea69ac9126a298d978b53525d623ec81. 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/CA5KR1906118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c18c2e9347c7ff9ee677b354e7c7dd7c6ea2e837e84fbc68433d1e3f6ce7272. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CA5KR1906126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9265293adcf6e52c84f16d8e38cfd9f4a064730a297071a7b0864c2060b3a8e3. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/CA5KR1906134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa391697f1501a5908b93ee14ad5a867aca03377e7bed8416adf81af1af368efc. 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/CA5KR1906117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534855338e5938c69eb8a944d2e923babe29f90650a5ecc39083997d098e01a7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CA5KR1906124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d97ec04f98a1a4d675d7f49458cbe857fcb2cc8e06fcec69c56aab3864f5c52. 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/CA5KR1906121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936540303d1f2458751a1f832085c8f97ec37fe4ec9707941cfaf6cd837e36f7. 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/CA5KR1906127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0438ce59861373182d69233da705595ab9f7c5042ef3ebc79dd568bacaa0ba2. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CA5KR1906122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63fbc790a781e83e709026b46c87756ac6cfe30284593ed63c4dfe172684521. 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/CA5KR1906116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf475834a18ce4be6cc99954aeb80d291fa4afd368a146bfcb5b0e14fcef3ac8b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CA5KR1906123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b02b5c4bcc40a96127f002c871b82c0cb850ae478f210b986fd1e9529de4232. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/CA5KR1906131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cce131ab6c7a97341e57676adb7214126c0198ede792032d468e09c91f0a593. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CA5KR1906129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6947e84258bc3c301afcb78b5ed782dc2289648acc42159049f6d7f646e3e847. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZANL1711123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd828261ca061561a0e5b2fb03e58be879f8ddcf7aa5111d34ab56dbebe3df5f2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZANL1711124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca3436322efc5ed7614d902245d26d35a57b3507980b50772d674b1eb62a7b9. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZANL1711129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63742e143ae029e9a028e9d200b630301472e5995ae9e76abba41561c604f668. 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/QZANL1711132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c105561aa2decde8551d8f1bf23096b724f6655e610fcb9be1e5356e8b5942a. 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/QM4DW1894554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6386f2b46d5ecdc6a3871f2c96b29920068e8402413e8a0e4b6ae35ae301c576. 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/QM4DW1894557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb67106534b5bb7e8206d5620bc30200ec89874efdd2ae8c226705f04a9b450. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QM24S1916094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343b14dbef27ca87c476fc4d1c1079ec68330ae128a3131f3ed1e417d392bfad. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/CA5KR1831813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b65673d85a8c161f4a4fdd5e6333ada03a5252d8b02b78209bceae4f77d514. 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/QM2PV1742330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8988b0ba14c2061d8e4a192f2444cc0343bece8fc9c39b064a943a2b364aa53. 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/QM2PV1742332.