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 0x81faab585039b4243f9ddf4858e91831d3ae7068bd35af25526bee156cb35601. 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/42c5d117-e4d4-4bb7-aec2-0cb7ed05c889.json and https://artists.proofprofile.net/proofs/artist/42c5d117-e4d4-4bb7-aec2-0cb7ed05c889.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 0xd4fb4b579e6d904059a21ac317f7611b92a26cf55b516d83ce8d410f0f04e508. 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/SEUM71400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb94e22d535af36b079d307ca80b08c93fbf4696fc70a5013650e72f1c714a72. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SEUM71400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1621f3d42a6d7c8c728e33bee011d80806cde35f8b1b4e464e8a659e00a30df7. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/SEUM71400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d0f60b9121e2e475dbdf7b3411cea9a84861015c0b73c419a53660aa682d51. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SEUM71400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cba84602fe7060aa9a83d84f04f8d47ffee91950fb8644f6822b0cb3f8fe8b. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:45:32Z), 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/SEUM71400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02d5458e12ded2c80bd4e58efdc86cede1bb24103189a945921fa25676b6b38. 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/SEUM71600674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680e117612b92f1705946a58076dc86c4d6ef71cb95339e93d2f654a6e3367d0. 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/SEUM71600675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b27f6049bc7e15852e478e701352b71510cbee189dcb1087998fe08bf1efd98. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/SEUM71600676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a063d2f8305545f36aa32e35508d3e18ee9e9ffffc7e702fafe53c1beb90c4. 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/SEUM71600678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f09c9750be24413e2afc1b78c97614493069a7ced4ccc31b521d314f6d06c2a. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/SEUM71600679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cf86abd47b1f7b79749ea8576668ae7eaf9b6ae1998091ed523fe20fe695ea. 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/NL4NL2001514.