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 0xe377c6fcecc31f85292fcddb7bc88ca2872fcc998721064c49455ece8a5f96a1. 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/c1d9a31c-d718-486a-ac79-2243fd2e106a.json and https://artists.proofprofile.net/proofs/artist/c1d9a31c-d718-486a-ac79-2243fd2e106a.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 0x912999cc2fbe7c241d03c6764f6d4ff5caf8979ee0b3f349b2cb5f51f41451b1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAFL2101375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8518c42ecbf69835c32e78ed15b15661e6c9923f0ade3cb5a58ed5c67b6bb5b4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAFL2191501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15f3a6d66c756183f0d2c8aad79e4c520aabbfdcb567ccd3ad38cd1fdc7f844. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/TCAFT2169665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99b4751f1dc8590d5ee28d4889ec7e6ff7d399ae22f127eba7bb6f36bdb7e73. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/CA5KR2251219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ffb0409be92b48c4ef6ad16fa16b3c23d5174458587ba89f99de3c1a343f2f. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:03:45Z), 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/USA2P2241405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ed86f95be6a4ffa400f82c003071036eae7b6e1013e04de3534aa8fb287b1c. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:39:22Z), 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/USA2P2250862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b01f3f87ce59110f08c76ed2eb81c07bfeacd6be03e433b1b8f84d982e059f3. 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/USA2P2315474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ee968bea0ab8a59fa891fa24d58955b7f630cc3ce8cd0319fc712ab4b7a992. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TCAHI2324940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d31827efee18ddc02bd005ef7df2d6a67af5bf695ba32a35d703f177e1bac9d. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QMFME2357958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90b22b75d9d3872e51e5cae51cf6e89eedf515e9efa64430ac86caf1abb83f7. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:54:01Z), 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/TCAHS2350824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7edb26950ea4f62ee8fcd0cfc8685a3d9cd8ec1bf904f2598f658047f819208. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMBZ92410733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d55db736a574d0bac0b7ad9eaa3f243c19ece8aa35ed165026bca8c2483cfc0. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:40:43Z), 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/TCAIH2411387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b919ed454c8db0a9e7c3cf72b7400087d2d78b504f930f09d88fa9d8ae8699. 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/QM6P42495881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282ea599c2cbe3a7d81102b5a5df3c412d02abeb6d89022f88fd2a02917c0418. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QM6P42401639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cf7f3c6afc1d5a70aec7a309129ae898ea39eca2826945bc0bd0afcc49f8f2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMBZ92410730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d280aad05f675a71e0bd5fc1311fcc9040168af898745d0e98d95f70923edf8. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/TCAJM2507514.