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 0x381724885369edb7f043d9497d1397c313fc040f474acdbbd3e8b53c8090dd0a. 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/d3a79be7-4f60-42c0-a143-db3d89ed52d9.json and https://artists.proofprofile.net/proofs/artist/d3a79be7-4f60-42c0-a143-db3d89ed52d9.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 0x664afbe7000221b356b93fcfbdf4d2a0606b56d38134953931806d2013d4c0f3. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ITJ501707669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d52c206bffaad7c24d8f57e6f42f3beab10f582c0b1d9b9d09d12161bec79c. 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/QZES62435384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a957eafb6a11c479c2952dab17ced918717fde30a4a7847265d78597dca5a3b. 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/QZES62435385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff3593bc9fa1d9352558e340021d8cfb48f724a645558bfc216ac1db16bc8eb. 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/QZES62435386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02596654c5c64628a476aa9aa7fcb1dfcce5f8dd85c5dc702ce26c1e6fdfffec. 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/QZWFE2352426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac1524e10a4e30bc3518b8ee5657e8492fc6fc71e2f8f409456565c25ad6b9d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES62435387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37734cc916f893e6d1e857fc94cbee6e00180f00af7918521a1cfe6941cea318. 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/QZES62435388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc646ce0b10f88ff20c690c6be6b43c532daa1f6b2e5cbbe4ba061912afaedec9. 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/QZES62435390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cfe5fea2be1f1eb2c5c95877ba3297f38a705615380a1c71e6ed742eef238f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZES62435389.
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 0x09d14d536d94bad1174d210c5dbff9e5f669e6b4106188856e32843a0720304d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFK2431038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a6ded15403193f6db39f54875ecfba20e323eeaef70dd8572649fcc4be3cee. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:40:00Z), 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/QZNWQ2552201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4d41a09e1782a39993ab7d57e8de1a7b8333b40ef01d345ae967b9dc0b1f67. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWQ2552202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91889416cc82ce32ac407e725114fc1d22955e8df9441671c12a3a54939e71f1. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:22Z), 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/QZZ7W2435721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ae02895e56f192a07ebebe7b1357876feffb5b20de43d14a7d05cd3101f8f2. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZNWQ2552203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5568dbe7ee52550240a9fbc1d288dfad07078fab8f89f8c0dfb4d259df2da878. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6H2518306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf728992ffc38c4b13bfe674c74d5587c59c01715f59e7026dedac886a1e08e86. 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/QZNWQ2552205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae7923c68ce29c9a59366e66a5a191e8c5fa254f0a749cd38f99b8dd3c4decd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWQ2552208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0305a7b05c9a98af6c4e85e9896cd01044b659b699ea030a032c1f7c1d44cb9e. 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/IT2G32100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda39ee1a97a8192c296311fa68765800ad630fde8708560ef42717e3cc989ae2. 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/ITRSE1600482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f981ab80b3454815ef0c7a9695f1d7cec3397c4ad56fc018aef8d2f14c4840. 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/ITDF61704005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed2ebfb071f4b08ffa52f679d45bfb5c15584ff37bf034637febfeb1aedd11c. 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/ITDF61701006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd8624e823417630acbfba2fce145ed996fbb63549729127f6c99a6fe81608f. 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/IT2G32300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410bacd297b763cc81bc38d3203a171d9e7d14874e3fab422883044f53f443fc. 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/ITRSE1600704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9143b4b41f44a23babd7a65de47a386ec5a26c48ab69a108fb254c7bee4b0e. 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/FR26V1623901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccc59c0aefbdc807697ed5a6cb814e9f51a1de74dc7bc6e086b9167e0bc0187. 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/TCAIS2480585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824074edb5d0aa9c62fb5b5aba26e3e007d94be9a943331f10b99ff8a2171d87. 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/CH6541617020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e89995525a6c743502c605cc20e56fa7b93853baf22cf4faa4c0235dd3c754. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ITY862100220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f47881c0fd8acc0fc8df53f175ef2ac4cfb2e575c1c314242c0281cfe81e61. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/TCAIS2483458.