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 0x2fe4396b246e4a89505a3a3e04395c17c6d4c3d26a3d5f59af85e0ab625f9b3f. 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/9e2fd6c8-ff61-464c-98ff-a10efe5e9ff8.json and https://artists.proofprofile.net/proofs/artist/9e2fd6c8-ff61-464c-98ff-a10efe5e9ff8.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 0xb91b1b4fba48f26bd9fa5f3694c85061744ab195c509787eef3c1137af6a835f. 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/QZAKB2428162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7d4a1f5142ad88e9ead16b592c5a2f490e78bc26d926eeda224dee05b84ab1. 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/QZAKB2402785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ada333e33ae965a23c42801b574304652eb03ede257b50fd16bc82d3b0df44c. 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/QZAKB2353834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ba3096718ff01a71dc7ed80f9ec1391448507ec52c19da12d3912c849c1cbe. 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/QZAKB2351563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeac77f43baea8537c04a7aca74cd7f83dc54d42f7da551a98150c35eb095eb1. 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/QZAKB2329415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13d1f2b4257c8dc1030d52094219ce68dbea84daa13237c4e31f5d4985ac1fc. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZAKB2329416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0307cfa437822d78b26c43bba08289e9e147f286afdfcff5f77e117f9e7e36e. 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/QZAKB2320220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3705dd4a229377b2117a817eacbe35595fe46f7c0659d9afb381c7656986fd5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZAKB2320222.
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 0x0955c7979b3d5f4b3593b8bd89892c48e290c3955b277252b1fec50e903f5ac6. 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/QZAKB2308003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acbb5bad9734349bad6d3eff91d60f38485fe48a7721808167c0395327e90c3. 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/QZAKB2308004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ffd2c0f5b51e9d390fdf88c7979d141cb1cdbb5da3972358d0ad4d628675de. 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/QZAKB2208449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868bc5c57df3ffde57946de8e1fd941872286aa0379a8c525ed052371cd90609. 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/QZAKB2208450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92c83b5bda21afc01220e2d5ed2de92a9c4955bf2aa68b10eab3b486f033cae. 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/QZAKB2208451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30182528e5e549100ab50e05f41dd1328a3b33828e1ea502629850eb62c28df2. 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/QZAKB2205808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75b5bfa2af9d198232ad485f6c5bc41d6cb5a3bf81a98ab2b6f65c1b46eb264. 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/QZAKB2205810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf0912bcf354c7da980c25c216dbd2a4e5684a90151df09e188056c2f1cf2e7. 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/QZAKB2200561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b720551370f6c0cb3a5bd987f8cf17bb3104feb721c5fb297a0ae71019fb1c. 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/QZAKB2200562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ecdb90cbe9200a0aaabf8de13fe294a5f313598f7b97ccffccd53db406a13d. 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/QZAKB2200563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa141b167c18a20fd3bcfb852b6c097073ea72c74bf0bf98afcc006802f0988. 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/QZAKB2173259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec0206b84922cb8722df0dd024b67fd3f43ebbe2df728a3fba52158e19b5b1c. 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/QZAKB2173260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad964d382eaf08d3d7b4571152a9e22031cfd91d43035635f8be38f7bcca615. 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/QZAKB2172624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e0825132a2ea37fcdbeaa56e049004c34fd6e92dd939716157e38b82d2107d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZAKB2172623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b61856fbd1b49d103ded818f95f42f0f69bbd345116cb3bc190b245c122204b. 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/QZAKB2168335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5077f0c3586dc4c2273f6fa6dea20cc84dc2ff10d7f87b0064aef8b75d9250c2. 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/QZAKB2168336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa413c8a0e9204f9f807c0537be2220a3b2989188866bdac7f3d6239d3df1ca2e. 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/QZAKB2167626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e2d0ace201255db87c3d7e5c2e429cbe60d6844d4728e1d777e284be5000f2. 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/QZAKB2167627.