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 0xf7113db9cc8581d99ad291156aeb92ab1ba48658fc47414fe512f9c529588a6a. 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/0765974d-6ffa-4cd8-8c50-5339b21ad383.json and https://artists.proofprofile.net/proofs/artist/0765974d-6ffa-4cd8-8c50-5339b21ad383.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 0xad80dfe813328f70f47a726eb36e66368549a51d8fd86c6f17ebff777b0f1266. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/NZYB01800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5037c07fdcf471f8133d4b5714f08ef1a546782594ce5a13d61affac4e692fc. 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/NZYB02000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73af8ec8d1cd29e50e5d4a5d247abded685740cfc368cf27cde7e2dd5acb6a4. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:57:42Z), 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/NZBY02200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffab58d7f97adb7eb946bc39f2a74216a1e3d8502bb1cfa904ac69ada495882a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/NZBY02200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232bb8d2cacc3385fb12e22f059bed6ae24d122a708fb27a9c2d449a7ced42c1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NZBY02300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24f7f8be76f2eb1b20e2cb4637ee1f0a9d8e5aa0f8ea29ec1a0c8f9f92d8585. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NZBY02300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c88b03823811f10ceed68f1aacc3c2f58240de52f18a592d1aba04de517c6da. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NZBY02300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb99ac6e218848dca8e17e80a4146146a9a88ef04ba1c50dfe5e2070b5d75118. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NZBY02300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fbb462fd445c9602571460c0fcbeae3bbd7a6d58fcc276d12aa2d5e0786e1f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NZBY02300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0644dd0c2d58565966e713e11360c2bed86d99bbc37daa49291af7ba5b2886b0. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/NZBY02300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75f1a1b210edc6150ef50e5aea1e54bbdc127d5a85fd7411bdd3c82ab15dfbc. 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/NZAM02402072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501dc80ebdb9dfc9f2f84702de4ae7c44517de61c88e4d110905d793f0d6c801. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/NZAM02402073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac95c387eeb117a280ab1ee776bf3a235a96b47dba97e15ea36d0bc5ab9db8a. 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/NZAM02402074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fee17d1b6666f16a3a370e469b0d03ace2c9f7a1c51f2300a375ebf7383ce8. 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/NZAM02402075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adf79c70fc94cd6c71993e9a2ad93ec24927c795d485a474d28b69fab97d3fd. 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/NZAM02402076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e0111b5a11029a68cd67cb145c35084c00674c4f84f510f7922eadb1f1923a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/NZAM02402077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27929745c71567ba9e6d99f20ab11d87b7d751f410081594738f60340e46c269. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NZAM02402078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0cfd75156035acbf3edee2cd18ff75d4760cf4cb19578614b22d75318ca98d. 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/NZAM02402079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7faf25332ea94cd431d7427cf0837bf3978cebe321304b5255a1e81973dcd31. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/NZAM02402080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6f79fbdc79fa7b63a6a5be7f5b17aa3228fe342121ab75d650844d6f4fdaed. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/NZAM02402081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646aa76bc320fb41badc3b48d4e8e312c1137c08e5ff128547a0a640d6aa9e47. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NZAM02402082.