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 0x5dae401ccf2d5ba0004ed8bb581e72f56a051564cda7a5b3d3bb2dad2f093669. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75ce81c7-5a96-4d5f-b3c8-b7fffdba20cd.json and https://artists.proofprofile.net/proofs/artist/75ce81c7-5a96-4d5f-b3c8-b7fffdba20cd.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 0x10e0a4e5a22ea793cc71a79d7bf082afa5c47fba9f122c64b30873b35627bbbd. 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/TCAHY2459783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834d2c0627bc6f2da7286efd20976037ca9ea1fa5aff0f0740128f8c061371b6. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/TCAHY2465903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea98f41fe1dfb6f619513ae932133acaeca57a031109434cdb83db5d08ef790. 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/TCAHY2465966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c62c818b6ab4d4844098a957213f663d6ca4c466e2f2643d3009a93258162f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCAHY2456864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f406824695707ef7e30a9a1782428bdeba690d0c7684832bf30d149a857050. 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/TCAHY2456871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc9351cfc83b6f51bc73a982a8657ab7bd437b1bbeb8dca4196fe658ca321bc. 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/TCAHY2456876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c1e8923ee9c7eb8cfc1faad66328932d40eb8acdd0bb4f4cc570ed1fc9ae83. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAHY2456895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadff6f6ba04997f550df6e3d7e89a7ddb400766210c0bb490c11b5488ff6497. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCAHY2456900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35493a4c87a4535cd6b0a405b06a35b46cb00c2acf59af35e98cf0d866ee9fcf. 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/TCAHY2456903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c64456d634eeda3050dac80ecaad5b451f3315f2820772636488c2647c947c0. 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/TCAHY2456923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6babebdd066b58371842dcbac6800c89455961e7933d76abf8783e5e34d2fa. 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/TCAHY2466381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6317a13be9d0ab9d2b473d94b661038f91c147ec484b2d7956d8b923daa6af31. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAHY2466416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dda731d0b1a019891034d9a63f9c142d2fc122be37d35bbbbbf91bfbb56f004. 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/TCAHY2466496.