1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x1b7bc2e42c98c9820e5e9adc2359c7d391e47280b8c1f9c5215499653d5fd44a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12916e23-02b5-4c4a-afc1-c865e0af09c7.json and https://artists.proofprofile.net/proofs/artist/12916e23-02b5-4c4a-afc1-c865e0af09c7.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 → block OTSBitcoinBlock must exist at that height 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 0x12c8c877064a557eff0904fe0db42b0e0cace36012d160bbe053bd41b0810d6d. 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/USY280735476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40bdba4720f3f5785167c64c7d3307503c52cfdf86d147fbe12e0b2048b1169. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:18:43Z), 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/USY280735480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac3cbb4ffd75d7ca36c6b9af75b4506be92b06d976f6bbd059a844090446707. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USTG39919401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74120ac2f55925b3dcb84602744bedbdc62586c5c80922f014e2d0fe78c43ce. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USTG39919402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d505e4313f83e7307389306fc0f1ed8dacd07deebed04b20948dd248251894. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USTG39919404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edcc8eeafbe7509726778ee931009a3c170f9cc9b4b27b1e7f443b4e7c559bf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USTG39919405.
Between the Machines b/w After the Ladder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059227672e83e8980866e3fba184c0a2e16cb7f558cb107d8ce0bdca468549a2. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USTG30223204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e18634e3a229dcde78c24d68c4b11bac69d854e86548170436441e77cedcd6. 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/USTG30223205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68c9f15e858b1ceab00977847b570e6333af8dc8587a8792964838b685ef745. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLH980400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924327af3b043a154b2f17f57710429f9e35035a8dc84d93cc5705b39aadfabe. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USTG30627102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555e73e23eb330ea40fd27f7d64302179c267afdd628c5c8cee099f6254f654e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USTG30627103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8931f70b649c29ad0aea92406e25c01eaf9f6613681b732a2a1164ca33a3a43. 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/USY6C0915703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30762c600193aa91dc7167f8a9c0e66147664a44e1a229beee3640fd15718535. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/USY6C0915706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819047bb318013d9247cc13fd752464f45d4e86991f2f70b3088efe608109a17. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWBS2500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c6b83b1a13e3b5932add1a085e5bcce68ced4bfa7fbf1bf46a6548ffafba93. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWBS2500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd60acd8575f2910e122d74d3561e25c6fd22522d915893f11941c9a174056c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US33X0605005.