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 0xc5d4e1bb9b45123cb59ae81e166f0cf8109c2643b9f36f73f406beab76f38416. 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/5e0bf807-0c92-4eac-9215-4fa2ea5abf16.json and https://artists.proofprofile.net/proofs/artist/5e0bf807-0c92-4eac-9215-4fa2ea5abf16.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 0x0025fa49ea9833bea45e009354762cd4bd27efdd0ebd9405998ee03ae98a59ae. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:08:43Z), 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/SE6I32102086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360fd29520dacc703a5be303bc7d4e2e732218574881a3bb5890176ccf8f7aea. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE6I32102052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb1012712cf90bb3d6be72a9505251bbf3fdb2521931fba59dfe5291ab21811. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/SE6I32101880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21340c7685ac366649f374f598245532a554ae2f5cdcffbaf1ede6cf4b96a35. 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/SE6I32102092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3656a622f230163aff42334a898e61610a1851a59c0305e78942e82c1e0e824f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:52:13Z), 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/SE6I32102093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d6e5f8a7669212a1e1554657a8b4a85fa19a73364812638d49ab3dc056c734. 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/SE6I32102087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3ce001a5d4086953fe519a756999dc5a30468470bbde968a859e1d8c613360. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/SE6I32102089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be3bff072517a44c70f06e4ed8eb5832d0d31380cf0b2b389bff5405a3d7613. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/SE6I32102091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c4814983d19a86d1193228c1f495774537326bbc46e096d4cda4ac7062e1df. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:35:59Z), 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/SE6I32102094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26239b403987fb701bf342b4fe1b9fca503a07cbd3fba70c2ace241e5af72530. 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/PYB301800066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69669864d88b2754bc6badb0174e88dbc6edad8d850579b992369b551dba8a2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PYB301800047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ad589b1be2c5885a737972ff853eb6365d30d75f3c5abe054cfa097cc68a77. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:15:29Z), 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/PYB301800041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e0e9ac944f2ab4dddd4b83cb0321d9cdaf784e7f85cd72672193a6fc0e3e9e. 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/PYB301800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b64723d69165d763d23aabbb01a462970f87f375ab09d6e6fb9ecc741b3cc0c. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/PYB301800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265fca903d2d882de1ae3ec5c5cf6d66b2e7cbd1312a630e1e50db3fe6290e6d. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QM6N21465693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970c36bcc9f03a1c53189687e3b83760d0bd872a99511480ffd6d4ef7198c09b. 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/QM6N21465697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9675d48d07e5d46224e6e3ccf1fee7a63c73cf5e9e9d27ad8bb72e7da0bc0185. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM6N21465704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e8bdb1b9615d6c41f6bf91c6d12d39ace36b83503151326c4d285f62019f7a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:59:11Z), 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/QZDFP2160404.