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 0xe417b1196000cc9c7466e5fcb798905f6ddb481d9558cb4e1d558858492e0414. 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/6a491104-eaf3-47c8-bc4e-a95facba2e89.json and https://artists.proofprofile.net/proofs/artist/6a491104-eaf3-47c8-bc4e-a95facba2e89.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 0x891ade4c94c56a78f04556e18ec9c005e686a85cc3e246e877befc9bfa107461. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/DGA082356714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbee9a96bde48453ec94276b9dd6af72734050f38704cbcb7275b6bb1ab3949b. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/DGA082356715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf2c930179493516e0cb7a132b50f11df8ca643c9a46f2a640489f9a8667eff. 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/DGA082356716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf7991140de2fb6ff766cc063121d8362dcd98b41101fae801ca7164dd3c907. 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/DGA082356717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf678eeed9107950444d32fab6da8bb5fb6c2de2f5c375b88b23f466429079cbc. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/DGA082356718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77986d2fce0afe416df62ef05982a2e349a2134ed67a7d3238dd6e6e772716f7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DGA082356719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b4d3baba0d6e8b907c22627cd73af90d21f77a69fef7ca5661ebedfdbda3a7. 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/DGA082356721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee07f9713c93a1ab9fcb60cf3e24a28ca4d3d28134c95d1b16a782641c6010f. 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/FRX872457707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd256ca7572df923b3941b9d1488e7d1b65f8c5d829b81effba6d45e724ff306. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRX872457708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f6a2f308e7cc34068fc793612780d32e37cf1f14a4bb4ecff86591b570b263. 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/FRX872457712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb79e273ec05b111fe082ce8ea1d278d7a3339108a3072c1399960f881037d0c. 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/ITX5H2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635f7ca0a67508a00d1f8dfe15e50794f04eecc5dc0ab06a3f5ad208a487ca4b. 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/ITX5H2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa299d3d762ca234321d2a2d2a2a78954e30a4813807df071f2f84a673d28b4a9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ITX5H2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6104cd3eafad5b8c97511583cd018ff60e9a63e258d8de693e13c920aa7ead. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ITX5H2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fa830e6dd92f325ed125addc200d53d2facbb144570ef1c9335676db0e300c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ITX5H2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5823369edff501806c6bcdf407fc53c1a1e9835ec5ea2b674992034a829a41. 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/ITX5H2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ca205ce5f0902c32f8178a3ec5b8097e53a64dbc52bc62eb3f40ed9cfa2418. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ITX5H2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0841eaeb0f095a555cb9020b5c790d5cec5339d471a44486b3c56b15d3e4f493. 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/ITX5H2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8c9feaebc7369e31c1a772cf2bfc5ec2789a127cef020036db9ba6cd6f5224. 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/CH6541824975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73773bb998a854423645eac1b5bc5c8bdcffdbc7baf6623404e8bc4bc2d6819b. 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/TCAJJ2508070.