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 0x87f00836ef4ac3ac094efd4c01dac7a4ecc931ec13be57e32ddebe9d159f5dac. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5295bec6-a403-4758-8586-bd76f307f2b1.json and https://artists.proofprofile.net/proofs/artist/5295bec6-a403-4758-8586-bd76f307f2b1.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 0xebc024ab0b46036e4615575863f408bdbd71893c08583e1bb690607c14e9d732. 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/GBRKQ2204524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4d590113c29d816fa45f33614b5d7f9cc678c2f663c4ba2f148852b26b7752. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GBWUL2257756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20aeb78507495e3148c33c6d099a3bbff5b6da157cab8d8f663b5dde27f1722b. 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/TCAGQ2296227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341ccf43bdb7893a5bb6fd98515dca2f5d21b45092006ccff5df4056d86462d0. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAGW2392591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5724c2ce6fcc245a4fb9bce7f718d6fceebfbf9a493769162b19b31c58283490. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:37:54Z), 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/TCAHK2335186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264fb92bb412a7498c6c3f874d27c0927e9ade3adc0eec6dd1dda08cf459deeb. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAHP2327516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5bebfe6d7efa08154685980d4d8be739468d069f2dd0362ce7f889f6fe2050. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAHS2342185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4d03b58776b4d3f4dfc8ecdbf4ad3a18eca7263efd2e257e22461961c2fd9d. 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/TCAIS2497377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd4604050709f24b328a232e9ebc2fd544cf7b5cbb94e64c6953adcb3caa318. 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/TCAJL2521248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169c56eaa53b1486f2484f4ba638d3ce2023fb2c5f6cf34a2484766331ec8324. 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/TCAJN2575232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e366549aeb5ba9fb8fde2ca6ebe20cac0744fbc7f1bbf214a4d26529c6a707. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/TCAJY2502727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2897f8685bf1b4aee01bd57037c4eae876bbc7bf550a48f72871de74930a27. 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/TCAJX2547122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895344c4efe79b0558330c0ccb59abfb7918242f5d80f8aec0c13c7f27465ce0. 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/USQX92400353.