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 0x30f2c3197ea4ad69354de2495729330179af5fdb965103c1dcf07fa3ae2c3cd6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac15355d-71a0-40f9-9914-b4911aa86bdc.json and https://artists.proofprofile.net/proofs/artist/ac15355d-71a0-40f9-9914-b4911aa86bdc.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 0x36aefa876d758ab1cd3d420c2a823698a42a534fe55ac737a516f2a85642f3f6. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:47:32Z), 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/TCAFB2040892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb0d0e0ac8bd7807751db61b5e5adb07c9dfb4157ed993963e3698e6e69d37a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWY2115016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b8b74c85326e207bee08c753f7dd27fe7450c053475a3372f289b2753992f1. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/QZTAU2161644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c36d0718037c53b026b0faddaf8611e9066873e67935ff79ffe7775a031fc3. 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/QZK6L2326086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe594fba64a3f750f60379b0eb433cb6545f9e3cc3ab88b5328244e3ac09e0423. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAX2313280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedadd0948e94d47921efda4caa1fb68c6782f4c6670260842e2364b392c885d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:30:42Z), 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/QZTAX2313283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149ec7dcd2c62d462b53800fc9fbd36f0c57cbd6b1bb0cfea796ac1633837bc2. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTAX2313286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e5415c5ec847cead347b929deaf3fab3cebbe6e713f14cfcece12b8c2f7444. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DGA0H2428920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8307c3fa929da6b4c0b6f119b8616bf1f3f239540a5e830a81fe29acfe4e13. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:58:39Z), 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/DGA0L2448229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8864c3b138e65ac59ffe80111c2f01baf2d45fd36e2d61f4cbfc9ccafa9161. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FRX202541097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f136a53551a59ef6c20f7796ebe56d06a096b670031a1df0ce12180727ce8fb. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QT3F52582270.