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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e3fe9baecd2d9d7e5bbd7a944d3d0e677b2fb3f43cd6517f5904b727cc58c1. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e89740f-46f1-4073-bcb5-757738d077ce.json and https://artists.proofprofile.net/proofs/artist/8e89740f-46f1-4073-bcb5-757738d077ce.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076394bddd4eef241f31a61ba6417872b25cbf5147b951cc8d2f469ac16e303a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRMUD2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d086a5afa218caf791e2f3f615a1f7c5c441f94794e294c22c8450bdac3908. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BRMUD2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2c9106316d5919cfe81b0180adc8b9d7883960e334f7d5639a396403e19672. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRMUD2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa225180e322ddcc5cae3dad42cec7f77298eb65cbfd6efa6fff55e33ef602765. 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/BRMUD2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a487614708a5783335558601490b5a044a5641889bc9f6a771574026edf7ad7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BRMUD2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0980756a54771606aaa8854d51c19fc403a518586ac7d36059b79bc36d6c988. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/BRMUD2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076394bddd4eef241f31a61ba6417872b25cbf5147b951cc8d2f469ac16e303a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRMUD2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f47607660f042f04a0ccd7f85b53fa6e7843ac64fec7df532bdadbbcc92287. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BRMUD2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56dc101eacab538ad51d8e271a3bd04b30112b9be4a0ae7470f8af49824fa04. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BRMUD2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aae0da1a20de7549a8e7552d2b507021b99d00e12e116d0417c3b5822bf8bd8. 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/BRMUD2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1476c205f1432516ba1ff2d36397fb7ce2ab92346791e00a7b63a284370517ed. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:22:51Z), 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/BRMUD2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b3fcc44288eb6d6319b3a038d9b322e6e1ac1910a40755792d604993afaf03. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T14:57:27Z), 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/BRMUD2100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79d2b01d1294785045db49844d59cae3303314b6362924c2558a2938d973302. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRMUD2100029.