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 0x98cc40914836736ddf13c86b7fb4664ee212bad33f1520341c43e0609fc6ad15. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d0e1818-34f1-4d59-bb0d-f0589beb4eaa.json and https://artists.proofprofile.net/proofs/artist/7d0e1818-34f1-4d59-bb0d-f0589beb4eaa.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 0xb56dacb1ed6f859dc08ff779b01952b0db14acd2cb82866cdc347633e05895c1. 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/GBBZV7553142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9470d4e3b3ba180199d945ebdafbcca0e2cdc0b3ba9de629b7a731ccb17ce1c4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBBZV7553143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e609f00810851ceedfa413a1c5614e41240f3df23cf9702070ff422b9f8a759. 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/GBBZV7553144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58aa937b632543eaff23abc4c2dd5c0addaeb4605d675b9edc8ea2582abfe67. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GBBZV7553145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d068e19ab50ce58e5b3508c849d1afd633083b7a75f90f74f0fb4fc2e9967b. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GBBZV7553146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522bb63c78c00bec5e78776acfac83ce463834cec624a4c0e5df1f166000e3d5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBBZV7553147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21af39211f801abb3b2e480a7420ba1721388d7618a305b648e5761e26df30b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBBZV7553148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587710ab8deabc8483d58375f862f86f46b639d47d3941cceee7bf383a544e7e. 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/GBBZV7553149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b33f32612cb9677bcd1c9c752b65841a4daa27655baae4a92e4953b6c126aa5. 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/GBBZV7553150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f15aa3cbca71e08e606f694798427c170b0b066828931990269a35f4debbbb. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/GBBZV7553151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb129b2beed2c7c2e6d73adbaa8f1d3883cde7766ca86b75258064d8144018e0d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBBZV7553152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167720e71b57d8d9e13df3dda54340e16e4d6b22dabcffe0b0cf4cb813528b0c. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/GBBZV7553153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bc528fcd2779572da09d953c886e8ba995365cf6de9548b54a7bdc024945e7. 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/GBBZV7553154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4b88dca9e24e70e18e7273e88568f396ac71ba5b9418a14b71f8bcda76e049. 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/GBBZV7453120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffaa269ec23ac6071dcba241a0c8144090df13090300f6ad67924ae32fe77d56. 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/GBBZV7453122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fef5bd65e2443089554572b86c4b0d7ec9b5c3d836c4dea38c7e4cb337eb5dc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBBZV7553132.