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 0x9138a607fb743cc47cc087b13489137b7362f1f722046b90edda03ce42b3861e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0f1c65c-cc5a-4e05-907d-b92d142a694a.json and https://artists.proofprofile.net/proofs/artist/d0f1c65c-cc5a-4e05-907d-b92d142a694a.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 0xb69fc77ecd8d444a41d69ae02ea57f9e9a03f07ab869fc41e95e5e9ff3ecbecd. 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/CA5KR2393001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0041af488b48acac5384c0c8ff846fea18bfcc16ae6316a427c2791d7323a1. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:10:27Z), 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/CA5KR2393002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1490910db2b808e3541c80b8a5560a812da7bb7e28f51d42b6c17e29c5f1f599. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CA5KR2393003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c6184f7e71aa54ad9e055a5ed96b43a7e150990f88ed7dab7074a870a1d2d2. 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/CA5KR2393004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f1600f2dd7817f6e84423b47be1f647495dc17f1e7913f4d8e82dabbd2bab3. 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/CA5KR2393005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc200bd2c2fbdc077d5de351a99f3d568c3bb4b5195643dc0ffbda5cd9551d995. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:57:06Z), 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/CA5KR2393006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fcdb323aac39d6bc9a10637f521eb19a1d7f57585c7cea8096d9036329c56e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CA5KR2393007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7176bc4356efe518074af9e3b203646701ffaaa66047072d09456655ba2f744a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:47:12Z), 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/CA5KR2393008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d740a942d732f9199088b87a8b2b8ea82a76ccd593b4fa5999172bd28a431d8. 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/CA5KR2393009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f69e5b825a98bec10966c42d64331602f758b733b1a5de41273da3f2fbf284d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CA5KR2393010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c54be45e489b2ea48afddd7f4070550b8c1d088feb98c0ba474b6632a7beb8. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:36:26Z), 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/CA5KR2393011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298f1cc5d488b2e73ff4c8cac62395575bb9bd6a1664467f7f710cfe02fc7b87. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:25Z), 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/CA5KR2393012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a53415c24aa349b0316ce48a9d0f89d84614e94e9859d0a0e842d46170d7ab. 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/CA5KR2393013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59f423b05de2e3d966510db74e6d1ccf25af79a49f2398ac8fc33c199c38050. 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/CA5KR2393014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8fda0e5c3e221f0c770674fcc5bd33426034fcf4f65cb69702c7693d66abcd. 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/CA5KR2393015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2de3691de6e6e8391007b86d7001018ddcb1aac49f4dcda059da34921a69c97. 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/CA5KR2393016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde89dc9ec072d68540e3445fb25444fc5fba957f82e0746ab6ea021ecf2313b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:52Z), 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/CA5KR2393017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e89a5cf8512310203b57d3d0bd8402a64ad0e25e7a8d001ae80a6e087907400. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/CA5KR2393018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0dd54550b79807354ddb3614f47c116e4b9a9416c38695c58595a6a4f7aebe2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CA5KR2393019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7621e73d8f78eecaaf5a81d559708b53622d9dd085470d32b63f3a0c740308a7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:14:14Z), 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/CA5KR2393020.