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 0x8275c2e4efb4c94bcadc547f49505435bf4958112dfee28559f7860a5968b9db. 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/7a76d0d8-6a6d-440d-93b1-322c7a7f931a.json and https://artists.proofprofile.net/proofs/artist/7a76d0d8-6a6d-440d-93b1-322c7a7f931a.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 0x7c8b7461d39baa16e2c7b19bcbcdcda8cedefb3afb4fc310d8c91cae9ecdb801. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN52151253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47de69be9f2009a6a160a938ae3ee2d8374b8430b97de875b92c55205f00a5d. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZHN52151254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151d8fe29521479d8956501c94a23a61b15b7c34c3a59b5d557c4e527b2b733a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN52151256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07592421d3702ccead05432edba180ad7f7471d3b74f63f6a0f15cefd601a714. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN52151258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19deee2a1942365b0bd100e372bfdb32ea083bfe81a7f66baf8d506bfe0fa08. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZHN52151262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19652d82b9b6b43ac91fce54aca1437846d42284d3eb0eece6011e3b83b828c9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN52151268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd182417acfbd906c7c4a0247709e29718f56f20c465f7e47b99f8102eadd8517. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN52176769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e167e13a6fda1ee455da2bc13cc10aaaaaeb40dd7ddd35d2a09e7deba0259a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHN62134857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2db3f6fdf0de6ebaaeb468579c0345824fb957cb376a92f76a32efd7d3b5a1. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/QZHN62135948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f942c8a55e861de99528971cfd2e009ff84b9eea898395da641a8f58b173678. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZHNB2150420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5485d1138889862931095467243e21b3eace84a40dd35a904b15a431fe0ca4a2. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QZK6H2146723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d43cc53b7086cab210ffa8fcd51934ec4395f4bb22861baf91b3f946788430. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZMEM2186932.
I know I messed up sometimes, but I dont care
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5485d1138889862931095467243e21b3eace84a40dd35a904b15a431fe0ca4a2. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZK6H2146723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2db3f6fdf0de6ebaaeb468579c0345824fb957cb376a92f76a32efd7d3b5a1. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZHN62135948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ba295aff11ca17a8f866524f7b938cc1784fe81736daa09c62f79d42b3c543. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/QZNWW2155697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf864c8d169088bd47868c0c72708524d9320addf99ba84ccefc7ff8d73823b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZFYX2281779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb427f1ea20c3fbb4b7a854e4ec3d74abe023958529694f5d8a8ac849e3f29d5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFYX2281781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7106985895e46ea9dba077707acbf323d9ba4bd77524e58f5cd6afbedf59ff25. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZHNC2227643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769a3456fec930f775a1f0d6de16a5be2562d6319b68525ca0fbd2fd33d49418. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6Q2279000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac7b88298c9aa034bc4f1ed89ac40cf09f7b3d22c171d17c6c9a03476a5c87b. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZNWQ2285059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb45ca37c6174d6d7958dfbdf73a30b2a7b443307b267ee874442c5947523c74. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZES82383447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903b63d28c5c9e0d71b9a27ce265ac335e64144c0e9bbad90f6a8985cc754253. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6G2392353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fab65b4207c112ace3f56e179b422ddba96427c72bd0ad12cb43edf89d5c85e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZTAX2310314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e2371d013c6635dc8ea645144f5eb5be4aeec5155d930ea1d7b4745a366769. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHN92194824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f1c94452969a28c2dddd2fd797a15df62be042e98d76049b07b09e98bc3769. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFR2410099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefad90846be94f48f185f0cff65709313d8196adc260673918b05a658596210. 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/QZK6M2528613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309a2ba74c8137e25d4f43998fc64b8c956f9ad6bd92dc47bbfb1b9531bf5882. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWZ2591616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1758aeeaa2db756d4674bdb8a5d7c0a17ca6b48eda2f8c376b0dd31cbaf54680. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZWFV2580204.