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 0x0848910e58a7efa67184e73c2ea2767fe71f2e857e76df1c10fd9fa9b70161ee. 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/eed1c9cc-14d6-485f-a9fb-ac9867bf661d.json and https://artists.proofprofile.net/proofs/artist/eed1c9cc-14d6-485f-a9fb-ac9867bf661d.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 0xd062177eeecbd4905e30495f4379b47a21323f015c059977893e8981b29a1d3d. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZGLS2289950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a240dc84607123d8b66aa189566e2483a3be5aa174ab5cf4bf6c35b73c0497. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNJW2296721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1eb515d2c534d8c2f0f43531fa5de5b2765f3b832084d16552a1e16f0a2472. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:52:10Z), 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/QZ5AB2322529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5cceca5487cebf2c387df453d72937f8edd4d8e427a97e1c9e020e371acfed. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZGLM2380814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779b0d2c28c8601481b4c75b13e5624bd96769ab45beeeca2359ff8f36c8308c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNJZ2337344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd80348d98431cc3be107a9b521a040c0940bd0d5c092d406a6ebd32ad16286. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZTPX2381898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d8fe264873f37e1bfc7c336ed3a52722cba176360add67f5f3f57a16768b2f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZGLM2423525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc2b6882d018634036571bbe5671659feb6df9bd60c76bc8fe095f8e9af0728. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/BK2RU2400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75dbad49e4c85b3fdefb3dd8fe9500696b66b0e404b056bf3abd2f0b5fe7a514. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BK2RU2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f91e6cea20eb698597f8967de763b00728983cd3ba617fec7a491fe5da3c91. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:24:33Z), 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/BK2RU2400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c03bf57a923562ce9ac44bab3483a26c48a155a576516704163b2335624f021. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/BK2RU2400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fb50d65271f241d66be55e5fdcf3a5a9528d964517e35ac0f5aaf5f6c1d5bd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZW9K2470243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d21097564ac17a018ad0d5ff7fde21a59076ca5f7cdcd0fb9a4ca4190ef7e4. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/BK2RU2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37b4211b5dd8fa6bc7999594907b44d75bf2ca65f70525ce0ef739e91622957. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BK2RU2400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1793ae37cd82197e4a713c6ff1cc3d66d2f9c5dfd8d5802514a8abf393791a1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:06:27Z), 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/QZGLS2522120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fdad7f1825e47f01f921a8047e6947e99ddaba78aba850d06b683722ae371f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BK2RU2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d4d33db0062e201bda2ab43f75627738a11324797cfb62297a42012b1d1deb. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:00:43Z), 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/BK2RU2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9846e99f177fb694b96454ec0a27833c691db1056ce780a893ddd22d8bcc2d09. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZNJW2538444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc258521d9a0de5fb5c788daeebe09960581bb76031c1a250befbf767b3aba0d3. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZNJY2557768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c358c8ef3e115059ffa30d485773b38b42ea52603ad423b9ad4aa87c518804. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNJZ2590384.