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 0x095f74f8523489276ee2dd9402fa0c064ab38bb62759bdba40c049a1e1c8e9dd. 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/d58156b0-53f3-426d-8cbc-ad0124139ac3.json and https://artists.proofprofile.net/proofs/artist/d58156b0-53f3-426d-8cbc-ad0124139ac3.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 0x0717d27fc1a5ba33eb8d4da915e8f87e4fb4b976c3f0d5ab3f8e899b778ed2f4. 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/QZ5AB2393449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fa911017bd298bce64790407d9c5cd2faad0c673128ce5587671d5e785461e. 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/QZ5AB2393450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017fcc6b011d148339e0afb54c5253de33fd9433cb6ed819506e4e3bf9872f16. 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/QZNJZ2226901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1062075caa75a9179481f2f98fb1082e197e37d161a6351c375538ed10cde2f8. 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/QZNJZ2223418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce2e4a2c544bb69c4434f1746e82a2850315a92909a75e6ca237a8151033fea. 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/QZ5AB2393451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9819be0e33432616df0de1bbc120ac50435ea6f572cce32eac98b842bbadbc63. 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/QZ5AB2393452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf044bb78014b1d1708f0b497f34e59ee9fd26ab78e8b03a627e107cb4335bf1a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ5AB2393453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e838efe34c04cd34041c94de391a52a37c2417e23e04da66693583fb6432047. 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/QZHNB2217106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9e3cf2f6db75f953d980552aa450f277eff8f5cacfcff53146e77fe0f8993a. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:56:42Z), 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/QZMER2147123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124ff98cfc05ffa398598bfaef2aaf7f961eb36fc3cbf66869622a63d2794cd1. 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/QZHNC2182329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f09e73154684a934ba18bffa3592336aa5ffc79fa489b73571a9ae590cc7da4. 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/QZK6J2177947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b264ef9de59420053e1fe434646a933e698b8b041e1b3a5ff20c18d92b2da4. 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/QZMER2147124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d37b0b6e9b35f3249a6d55b3993ec60573a24fbf1d6cb2e55625ec5d589e6b2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZMER2147125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e445eba38799f5b0dc3bac9f463b80d738ba8c9b8dd8518784bd781099ed4a. 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/QZMER2147126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972e860678ef5c755ef4d2f894c65f7043f39962e8d6140b0c91cb03604f7b54. 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/QZMER2147127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e985fbcf611c8075920e181d2cc777b48e7e8a46ab59e2c6553c72679e5132. 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/QZMEM2110794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1315a358259012a33e91fee4c457c89c296316a525bb2bc2f4e632688d3943c5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:45:37Z), 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/QZMER2147129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b91a8f4fa6e7ca8b8f25b77ec387a6098d567d3fc2e3d9dc497a69878cba671. 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/QZTPX2350442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d311a0ac15241ce4e1dee710081752e67130683bd94eb03726c8446a4528ee3. 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/QZNJW2387998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e60416d49c9516d59a8a505c750c4065016f18016731bc49cdfe0285f3887b. 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/QZ5AB2353183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024429ee88cd0ac3f280c94c999db12d5515f69ea5238ae02c892f8ee3d19485. 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/QZAKB2312131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0094c3cc056e2de2360a22551bc1f3457f4b24ca7936a06ed48889ea581acef. 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/QZVFR2200223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e82ec472bd5c4b1881cdc8afbe121ee0527687ca8ae04b69cdf90afba57f75a. 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/QZMHL2231071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1062075caa75a9179481f2f98fb1082e197e37d161a6351c375538ed10cde2f8. 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/QZNJZ2223418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9d49c9c1b5c3f101f862aa6862513bb3eee624b60374b4557d3c6bd6484f85. 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/QZFZ42244980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd8bde6645f335150aeb76fc99326e51ef63db672d1f7efb0c9faf2ab253488. 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/GBKPL2035647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49290de51e565eb019e1c2d90fcb70a2c033507426af237bc3f76d03315aa26. 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/GBKPL2016561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6681935f71a87d8122e88fda00a13083ea3eeb43afa7d4f51852b5e52a9ae0c9. 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/QZK6M2178231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8337bd74b3c282f3c07856313456681ae8b31599b886c53fe8856b4aba83f91. 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/QZ93L1957160.