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 0x28f72ce3b32b55197e4ff641bf97cfc632a82a41b577c98f27c81e02ce5841e3. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f11ba691-ac00-4cb5-a6b3-d71fd268b5a2.json and https://artists.proofprofile.net/proofs/artist/f11ba691-ac00-4cb5-a6b3-d71fd268b5a2.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 0x9d3445abedcb9d409a72a311bd110a3e70a2a2c41eaeaf93fd734165394d4e64. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GX89G2342800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef040f332e13e9645e5e8b15c1cd2a79ebae018d7a3149d3e90859bfb16d870. 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/QZTAU2283581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af8ef2877f04ec652f77ff5ccea3abbd7f3553fcdd51b52248cea8c6468a88c. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:22:53Z), 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/GX89G2385055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f0c80dfe1257379d97b6d027a1709b146f26da1594c9c4e097c19c21285530. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZDA82359591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f34f1ef2ebde1d224873e7fba0f3785a321754cd506f0dc6ca2ad14c6c0154. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN62307304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c02de13d466aa408c2cf2cd75de959ab6ad9ef9f8de71cf0620ca3a5ed09370. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:10:17Z), 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/QZHNA2348454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbdf7d5309840c0ac89804d65f3f8a396b50a1c645e114bbce1efae37ae2724. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:51:56Z), 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/QZFYZ2361514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669f6dedf192fcdc5259ebd8d4fac4a8a726952d8f43cb1b19535e1c987f2785. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/GX8LE2389324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4088587dfb5c31d2e13fda233b86bac5dc443e4382b5ee535e9518a46d5f117. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZNWV2359841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683ffc2de3c1e0461e5a7480a55f380afe27198a1dd2c44120c62a2420dd6e1c. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZNWV2359849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a634bedcdce8d10ad5e6db2cbb4c61bbd9f4a19020cb795caa13e247d56470. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZTB72320710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbbf1df32782e0d3729e671a21338ae4fc211e3f16df59106573c074f09cd72. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:28:43Z), 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/QZNWT2420439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ca2400ca9b57cc609eaef2329277e11a724fe4920c863f8c03fa69c5d6668e. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZWFR2468831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76de053d54f94bdf0f1aa3d6e03832d1eedfd55519b4fe75c4f2b55a5f28e7c5. 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/QZZ7W2487717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2046a1f74c5f4ea7cbea6b9b65e06893d01883f7d24297e1bfdc56559261dfe2. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:34:00Z), 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/QT3F42413222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020f91aa9f6f4b243ddbdc3431982ade8217e30c75a49a08a04739a226a81fd3. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:07:27Z), 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/USUYG1724106.