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 0x661e5542244ac7465bcb119ca90db46f6729896150cfcfc1483b28219e575035. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5fb8df93-a3dd-4fc4-8441-3a69132ddb3e.json and https://artists.proofprofile.net/proofs/artist/5fb8df93-a3dd-4fc4-8441-3a69132ddb3e.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 0x255504eed470ddb6ad6985bd256a8c1b2bd393ac24c1b120a8c3d5c25c7f26b8. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZFYY2319683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d161f147ea84bc572e13e992ca85282c7954d3d07cd7f640a98a910cfa5a2e3. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:40:12Z), 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/QZFYY2319679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe602ade634e8b630d51ae5d7ebab05e8577bdf97c8d97699c95f183b302fb033. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:34:20Z), 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/QZFYY2319686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264acdad5316c6c223d4c4fa553e77c9394b58e1b04a34b10fc6583606d6a66d. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZFYY2319681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3127a5b4ee93457f74fbe6b3015cb671dc9d9365dcf632b27757e83692067f01. 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/QZFYY2319671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44853c9f829aa2b0c34144f02f4cc2c8a3e40578108cfaee530a7b07e2b2150. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZFYY2319675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e8588f514c13ed312909f8f417a7979e63e0ccdca829386a94e7f885514e55. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:26:22Z), 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/QZFYY2319673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ac42b33594d93243c49c6440d43327d2ed2863d5b3c6a953bc9d8cf4d13bab. 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/QZFYY2319684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c90e7ee7b0ab89f4e468880e97a1be3d031eb1a4d542dc767e782bf0f42101. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:43:55Z), 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/QZFYY2319678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8450fc881515ede660960095fb3985e721475324f50aec56e740787e41308c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZFYY2319674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae2302957accf93185b6ab30c94ba9cc58676ecbec6a1278cfbbf064bae74c9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFYY2319670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66594062fe397268893092d2d59259405bcd5e2bb251e465702a28eab9195915. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:38:48Z), 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/QZFYY2319685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7f99319626fe39ae8b52907752c718ad2e32c1aaf4aed2f0f559c148fa7a99. 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/QZFYY2319680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3656bed66f905fc40ea4c6332655087674db59f102ab2399bae24c067d0488d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFYY2319672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ac4d61a68eb7c3f5610075482050a0cf5e9f240edf512b13bc38948cef91e4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:51:19Z), 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/QZFYY2319676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8400fc4ae8f396568c0eb6cbc725040e64f59589870fdafa4b90e9da1c54c9fd. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZFYY2319682.