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 0x8db1c0c05ade4da8d428a03b1b286050bed00b2e6b8670ce6cf25ad773abc8cf. 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/f54b1da6-775e-4b83-8304-7ec9b263f1fd.json and https://artists.proofprofile.net/proofs/artist/f54b1da6-775e-4b83-8304-7ec9b263f1fd.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 0xb9e96c51c08240eb3b0131ac415bdff2f52045c888bcf825a37072ec1be01398. 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/QZTAX2243151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8c9131363af9bfff6363235e0b232d09e2edea0cef0472b177f09fb6e03d59. 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/TCAGU2387713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd70f6724a24b16818504a8f542cf462196262304bd2e26a2daa781758ed3c1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ662432576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b98104595ddd52372d18a732d11de1d2acc7bc7184189a8d58509d83fa525ce. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN72446247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185ec9798fb45deffe0f0f07c1718f0b09796f258b0cd90c17775eaad8351385. 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/QZHN72446248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde570aa7e59a032b3578cbf30cfbb7023de5f16f4d5a959afdea9d152565dfd1. 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/QZHN72446249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9221cd8ec04662ab05fa912d598023cb7dea6f302854b1927c2db0596771740. 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/QZHN72446253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37c0cbe8a06c2de4d0511bd23d664885ab7df10795d575960be7bcb4d62ba85. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:06:45Z), 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/QZHN72446254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119894d7c797197169b4743e0291b5c31dcba78cd0dda050584f2f5241f0071c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:15:48Z), 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/QZHN72446256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c0a29e5259f185a4d7d3876fb912839f50942969f270a69b9c05e238d66892. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZHN72446257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6884b7f43dd9d83850b48e01181cd4a0b942bd7a503a4106b2a690a1bf889bf6. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHN72446260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe637ad97b80bbb0c7a0eb4f60e1a4a76e8c00224bead68b1f68bbd92e8825288. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:50:46Z), 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/QZWFR2411737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d8c593bcf24f656c0e0d69e639faf6fb860c46b83b200d0feb71d711773bb8. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZWFR2411740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4bcd56a878017ad7ff8f97a11a12a1b169d0686b37bd1de8b28c252926afff. Chain 2 (Bitcoin): anchored in block 957523 (2026-07-11T04:55:40Z), 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/QZWFR2411742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be58aa4ec0e29c17b7a7682d2f34ced569e91aea8c0143e7f63f907bd3ae4ff. 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/QZWFR2411743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa145dad030610bb603b9483bed2bddaebc139a16b58fab285e9855d1e1d20791. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZWFR2411748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc75f8ebc823a3dad9a513fd68c69372dbff47883653bf16bbb61d0f0e5c0f0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7W2487042.