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 0xabbf4078693441440dd593144d9d459c428c9071572581357fa0aac748b38296. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9f22144-17b1-4489-8754-b78de7a68db0.json and https://artists.proofprofile.net/proofs/artist/d9f22144-17b1-4489-8754-b78de7a68db0.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 0xb44e42bd03608d28a35eb5e07c9f73f512ccf0521299f9cd8dbe4dadd6c00514. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZMHM2430131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb15a2d7f6b52f0065fb27c5bc082b899636bfd8846181ff3476c762647ef2e. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZMHP2425068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24acfc2dedb400cc6bc8a5df35c2e1c93c896d7ba780a3071b9a7963c9c22b45. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMHN2453260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7d08f248c208959eedcfc8c73b273a01f2b0c9435631d2092aff8a10f01204. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZMHL2468026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f64a03b63226a0124c4a6d0a7e24b33f3c1e26687135eafce2b582ff641fa51. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QZMHM2478348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf821d416f94cc5b5ffe9c619ce0273a3d58d9cfd138aa403d99e08491ff3a461. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:26:49Z), 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/QM42K2417915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41205a8e0207df61692c93f3ebd44f17561d20bd299cb5fcd3dcd83ce6fe8cf4. 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/QZS632443347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0338b9ca4800497c0deda51fa238e0bc15b811f77402b610398c65d040d6a97. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/QZMHP2436015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d857a96c58c13d56982f2238bc0d8436e9963c14a893cf90e9ada0011df10a. 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/QZS632458463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6006947799216cd2959587417aad357b4fabb937b0aac5483794186f89b923a0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM42K2407078.