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 0x6ac6354ee07239329610470b122af51c0cca3a899644bc9d426cc0567785edb3. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8efe2787-00c7-4213-aace-b256ff6a207b.json and https://artists.proofprofile.net/proofs/artist/8efe2787-00c7-4213-aace-b256ff6a207b.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 0xb051098dd27f0bc1c4ec9de902f81b62265de0334e8d273c966057e7fb4bcff1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMMUK1600376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfdc2c048e71910c786a9c475f20e7b677d10a4ad33cca24708d418e29fe3b7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMMUK1600377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc29ce5563111b2f305f2c6d3beaaf2ece5cdb17c9c2e104355bdf4ab7d4c78. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMMUK1600379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dace3187e2fc58ad91da39c6b1898d5477241dbe5c20e66412920152c6f203. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMMUK1600380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdd2af584f2d17afca84fcabd37ff414cc7074445da74441a98106b7a375956. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMMUK1600382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2e1d15b46464ddb7437c3ed8572b128341f58edc88492dd3007f484f468ca3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMMUK1600384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb165b5e12351a0c64dfa48a5e2770a68aa22332f0e1c71a28d6c9595a4d247. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMMUK1600387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb43b4c1a16e05417b06437c1e67c217eab8b8bb3b3ce65aaa68cce16ac9dfdc. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QMMUK1600383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbfa4a6c4823fd5079dca253672d6cf6214e7d181681dcf6f970c6d57421969. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:32:13Z), 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/QMMUK1600388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b9352dd58b77bbf89d5c2c5ca6b3b7798221cd9678f5b4e3ed0e92efe1180a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHNB2353172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7bac21958a79a2ef6b1a815a7406e2ca56a6365364b46442087d95fee00a39. 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/QZPJ32110592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c50b16d1abab2d8c745da606eea4b2ac5a7ed9b8c7e6ae629454000a467bfc. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMMUK1900357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e479cc173f237433906235bb8a0f1245368b3872f489c8018c30c399f556fd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMMUK1900359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c50b16d1abab2d8c745da606eea4b2ac5a7ed9b8c7e6ae629454000a467bfc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMMUK1900357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9c4bee150dfb8068ab0945ac0e63d9de39ed045d2f45a8962ec9e7df2e281c. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM6MZ2287986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6efb06c81623eb1103ff02d1bb71b73ea92e54e35a76e93ccd705a1e536c4f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM6MZ2288043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0ea2fd42d3e486d64d1fc0eadf11cf3dd3def7ce3a3adeb37ed8470ac50014. 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/QZFZ71917886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bcb554113df907a467416181340615de610af4052f8c508c2ce35ec4e2a935. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAT2177483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67741b75086cd943a8eebe3ed412f04c30e6cae33e2029a116a479ca46f1c5f5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZES71925720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0ac2c17bc6c1478cc2e0c61c564d9c4a19aed524f26851917d957ce9670089. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6N22223008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367fc970a3f53bc1ed9de472d3da2d2e9997062cd0de6051d6dcf947ae53e709. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB82230188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc17dc0f12944ec5e8982de290a321c886a20d73db62e02ce7845fc763870047. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN42305505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bb228ca23d4a38a34ac39a00af7e43e56dcda383eba88df676117941f6f5a1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN42306765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5baa58c6f13e479a2f8d0d0794de02c6e95ebeb67adf9ee59d042e73394664bc. 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/QZHN42304616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c832d082faf8c9f7ab02c6ec8b5287f2f670f2b3f90fad007741df5aaf4c39. 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/QZK6K2250052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b9352dd58b77bbf89d5c2c5ca6b3b7798221cd9678f5b4e3ed0e92efe1180a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHNB2353172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7713b1c17635144e8f3fb58b874867989ed85214127b32cb2ad7934029902a9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6Q2346331.