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 0x958c1543333c5eb194ed577c6fe1570fdf7f9519f07a66c73fb27c32a3e14049. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b22487c9-bb78-49c1-a800-b9397f06c593.json and https://artists.proofprofile.net/proofs/artist/b22487c9-bb78-49c1-a800-b9397f06c593.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 0xe89c964b2ba254f3e22b80be539a51c8d6b3461b697bb795181ee2c5f459204c. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:55:53Z), 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/QM4TW2128379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d5e79353e8a5893d55685ef9b8752d8e91e45cab655574c2719420483eeb58. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:53:02Z), 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/QM4TW2128525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c26f8675a00aa7710d8832a88f6268ac7dfd4526362ca2abd892c5a22d6c091. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QM4TW2128530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce9e79f22d7485662f8f335190780ff8ad56df468f0622d1499d612a2517a02. 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/QM4TW2128532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8218ced9ec3e164a00ec6712b783be1dc0d08fc39bf878115bb00e165e8cd4b5. 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/QM4TW2128533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485ce39711400517472ae509f986149d6128e63d6b2c572aa81b9ef8fbb38b33. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM4TW2128534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750d6b972034eb4656f618d9122669828c34ee5cad2f911a89fb3ff39686b019. 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/QM4TW2128535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed75fd36251493a1882a9fb64b8dafa882a09dc53ce3aa15434cd26cf670f96f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QM4TW2128536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f77d1a3b8bf3dd5cb0d467ed17c9292614740049fe865928ba49252bcded8da. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:01:48Z), 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/QM4TW2128537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078893f92ff7d3ecadce330d117d2efd699c91ab49a976f01c10d02aef6a4473. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QM4TW2128670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71352ac4eab9f39d8c9f32cc3edc5b032eed5148841725c9b3a6dac47ca11020. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:34:57Z), 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/QM4TW2128683.