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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7246eac70a6e142ca4865d72fe1133e05865b6a18ba5912e9dedddb425839023. 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/80a4b15b-7dab-40a0-9e6a-3981ff0ef0e4.json and https://artists.proofprofile.net/proofs/artist/80a4b15b-7dab-40a0-9e6a-3981ff0ef0e4.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fd6f3b0c36ce7c4556578788ccd8fcc44a6f51a1105cea472d1cdf49d02907. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZES72417695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c173f8a2f0d844d566c52ac8f4cde61c172550d650f5d2ed5770f8d5a9232fe. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:57:28Z), 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/QZHN32434370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc921f61ee4630ae47a6e3c9cee83cfda3815badbbd6ef599555a9a31d8182067. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:44:28Z), 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/QZK6N2474938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7144e6059f27663df721ea5a13252fec2d577f5a8a4ea1a5f815bba3d5dadace. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZMEQ2547152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce86fd1a42dba627218ad5a190bec323d4ccbed124dc0d48bcd5fa8cbffc9d29. 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/QZTAY2581780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276785eb8dfa4a04ea37ea1e3eb16dc37ea60a14b7f2bca1b1485389964020a4. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:47:40Z), 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/QZZ792559476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd11e6e37c451d80cbf6f58d54a8bd2eb0be6a1be6bb7bde59fa4fc4465b98e. 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/PLH441800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f2550aaf6daab6e14aa76c8cc0836dee579a795203bc5e6443598ccba27da5. 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/PLH441700073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d479337bd64a6786c42458fb2cb381279f6a9f52213a3dbe894a3a1e3142a81. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLH441700100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2b829365ca8c1ef0ac1efd7d915f71853989c65982e179380d2a589c76f09c. 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/PLH441800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2602968f4e878eb16ee6863917443660ef484b34f19ae8bfb55800c21bd1dd. 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/PLH441700060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc38d06e548656fc08ef6b12daff5caf804efbd55328e051070c3f86221d9ec. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLH441700067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835c1a114b0a33d130b536c6b279846cfc3f2189a3d61ff7216a8322fca103c1. 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/PLM862400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1538aa0516f99cadc06b5dcb860a4f641dd8adc7efcaf640f755fe96a3d55b. 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/PLV402401801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344033dc5c7cb1aa6df6bc43e48225939b513c838411077c55ecebd084d21c7e. 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/PLF242210735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9b3e8d9893fac1fc50bc5649c818dcca8b935310ef80fda05e5020ee828eec. 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/QZTB22355144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94d502dd59159a415748db035e389ad9a6d05b8d464db0f7791a9262121b6b2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTB22355146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3b2a2620a3619cf4727407fb19ae86096f23ddeb701c7a1e25aefdc3dfa8d4. 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/QZTB22355148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07ab897b21818b2c13b6e551fe7af3ce17f8258f33c9a50a46592b80ef23628. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:44:45Z), 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/PLH441800002.
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 0x26c8479204ca45240b0a7a5f2a11fa56ac2cdbea6732a377920884114fbe9959. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/PLH441800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f513b7b1d33630274876947b252968bf6c853cf7eede5f37b5d7567dd6c9a74. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/PLH441800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0a0c13f38ca8953ab27e1e6b2358486216a3ffa1650c3b94e656804936d047. 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/PLH441700098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65891c5679ccb1c2acc3213a732cb8d57b2c66ce2d4ec3b4aa11c4ba144e3e98. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PLH441800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702b2705048869bfae6289c32f695ff8105a2e8221d0c3e0fc1f471d16e44324. 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/PLH441800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8809efae20813f12da79c69111ec7c093e3fd0681383333d2033cbc16157d3d. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QZTB22355145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe504b93bba2f2d53bf20c1891804b5546198bffacd3eff0ae0843fe55243eb2b. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZTB22355147.