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 0xa3be12862e6387cea89a8e043693cb210ce619a98d3e9c794c3b2c86ace0093d. 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/7fa15527-e052-47f5-b48b-c00561afa26f.json and https://artists.proofprofile.net/proofs/artist/7fa15527-e052-47f5-b48b-c00561afa26f.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 0xc0e93e06a031cd7f3759401dd06a16549cdcacbae66f905ffee6f258ce0880e7. 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/USA2Z2001101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d69d4d22ef020b7ff244896437919eeb9c991d5e03bccdf5fddc30a93c32b2. 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/CAZ842300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5627aaf5e59951b274f62b7e7e413e5810428b7544964c612d781e0e14a342e7. 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/CAZ842300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd576b2f58456e948610823a59aec408abac23b2e454d48bcab1dfc8ca53de4d5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:11:06Z), 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/CAZ842300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d2188ed631fe52b16efc172d89edaba892cfe03d0d72d3b1a80f8e2e110c8d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:16Z), 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/CAZ842300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2ba26100b59b4d66575b7c32ba2ca3cd6d2be95f24e974ecd4c6e38ed6bfbe. 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/CAZ842300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59116af015c3ddb1311359310f4c17601757ab321d716fb14a22e1d08aceb2c. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:39:54Z), 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/CAZ842300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99558ed0e592d864d0ac9e74b65ffd1dbcdc2b2ece7f2e969358bbd289bce85. 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/CAZ842300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4021f386ff25d4145a87fde85d74a2471ff625469a0479ad9dcd0306c4f39565. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:23:15Z), 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/CAZ842400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675b1eca5c26b2b07c782fb7338613cc144e7271611339d9de30d127cbb73bd9. 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/CAZ842400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dc025f46f3c7961933b86c9df65d60a7c77be8525a77e74fd7ad14089e9d33. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/CAZ842400135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c030cf95ffb8a1af8d1afe045371f136984fc98a7303327b2d58d94006e776. 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/CAZ842400136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c1eff8fabe494b5ff281496d53436e1b862f6e581cb112397da2ee4163345c. 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/CAZ842400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a314869a41595e635ac1409003e8f79b9c17b7ab2ad8df5c15813550c3d28b. 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/CAZ842400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675b1eca5c26b2b07c782fb7338613cc144e7271611339d9de30d127cbb73bd9. 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/CAZ842400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9127ad9c8d8edebb94d2ed607713dbae556798083d22fbc2207dd415c3f6ed4. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/CAZ842400141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe892e0af969c7b938438da0e25c2deb4317bab95afc03d3e6fb8bd99ec3d0968. 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/CAZ842400142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9762fc24fc34d520a358d00d16b2935135891b7c2a134d17898ea1c50f0bcee7. 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/CAZ842400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69d3c001b7ae421811a3f315ffb3ed8eb0d04b3b6da94ce64ff89b88dace437. 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/CAZ842400144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e7eca0596506384fe7cfac015dbe419674903b2ec128404319c27f471c50a3. 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/CAZ842400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113c31637ca981edd3148f2a5455b0a085c3bb1015a98744c7066c0592476c36. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/CAZ842400146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e30c53f5d40d511d16f806323be4c874814093efcae689bb84c20d76aa11c7a. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/CAZ842400147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5febe6a3896c08142493561a7cbe657bcc416c42f384673b98bfcc6089077904. 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/CAZ842400148.