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 0xa2c0bf271004fbfc66cada7d1681282337bbeefaa2a8325d8bf1d564e8886be0. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20d556da-5d2e-42de-bed3-ce62426aa218.json and https://artists.proofprofile.net/proofs/artist/20d556da-5d2e-42de-bed3-ce62426aa218.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 0xf77ba99853f4cdfa274d8155e09b720f802fc5c1324f9f82623b362013e997bb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFYW2130128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f539a1e780bc1afc3f5552dc29d88f23e228e35a8f6ca666bcd2af5232caf3. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:34:29Z), 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/QZMEQ2132725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9469144ecedd046d7c6417fc126a7a7ef3dae7d2946cc96e79f14273e8bda7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWT2103370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2aa2217cae2f20faae720ce0bef7042a7bb10f1f00cec56807adc8ba7d20f8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZPLR2125555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14e99c9079ccc9b536e15e36a8837521c37f67dd310a527eea9db2802d794b5. 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/QZFZ42260141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69b181e97f5f9b6b0fae25c5a4c77a27215d8b1c85a87db657e5635cabdffd2. 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/QZK6Q2213289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf3422d9bc682aeecd4f7346b7efcdc21700e3df07f39e2de22231df4390b32. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZTAT2296803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43dd424078a34e4182c379337f5413e42860d8a851e7704c6adb70cf4cc1ddf. 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/CH6542317150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc980254bbffac988c3feff990e425f3fca33208aefe25f7b90ce0856054891. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FXQ952300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9c0c716bd9516d3c2f8fbd9431438f22d8c6dc954cdfaabd7063938af1eab4. 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/CH6542405032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d6d098dc783eb0587fee3db828464560be90e29d1eb131ea76c9a8ab922e6f. 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/CH6542356028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b68ab38219e24325ba1c20f46386d5489c4dfc5c2396d844de22d4df250d19. 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/QZWV32303499.