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 0x1b3a42c22c2044e1216a0771b2003af666b4527bc5e879cd1fec5bc8e0669be7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7f86bd6-3c24-4c23-b25f-98ebc1ae724c.json and https://artists.proofprofile.net/proofs/artist/f7f86bd6-3c24-4c23-b25f-98ebc1ae724c.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 0xda020255d731104b04473c15e366804c498b6c51176870ce8a5e1878f303f2aa. 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/CA5KR1521512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5014058054a113347de1023b74bf497e52eed04d7a99ce7f06f695e940fd1382. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:59:35Z), 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/GBKQU1621361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2849d360f963d0d6ef9c2cb620f78dc15e492dc1c89568e95cc88ff57210e7ce. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:28:41Z), 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/QZS1Z1632796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eba0e363e79997ef28363f15fb96832cb08be212869e9441017b1d0c64b39f5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:01:45Z), 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/QZDA62393383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc7dc27b3d4d5f1c3ba3b5148d52f688808dbf0c7337e8022a5491b5dc3aa33. 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/QZDA62393386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe2ace795fb1f1d1356dadaadc6fb7cd2fdb6028e620fcf3a99603bd85615dc. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZDA62393387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e32b3414097e440b4213778acc424d52ca06f36231dc3e6d0c959e8ff546295. 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/QZES62372115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89a4f8f190db5e23a654d952cd0dbf12b03f8da1df90006f298c66da910f266. 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/QZES62372123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af7b53f9ec6f6681f664d44cb2f9ea6a5cc772f9b247bc231d69ce436ad6082. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/UKFZL1901002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d87bedc96788ad41fed72f9b7fcba7b5a5e53534c929b864cf4661f582f678c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UKFZL1901005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1303e425c78ffabeee5a972de3a286bd552e83dbce03b186c25fa0dee597d3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZH5E2193928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a8d9b29c2b16ab84029e994318e3e37ae71d27fff5360bafa1e992a27ddc06. 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/QZRPB2133224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de2bb84e6ee40a8967322c3dab9ac4978be11c58f997c9afef5a3d82b20f4f5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:00:07Z), 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/QZHN32367610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fb23d52c702d5d8c6ed12973e9debe77ddd6983a6c2685283b288a9fbe0df7. 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/QZQAY2304278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fc0e376712b00081c2293519853b7d67135f523f22db5b7525025295169da8. 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/QM8DG2145301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83676e04ca024864b32054c38184d246a41da49b64beffa67993ffc72b10da0b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZS7J2348018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83676e04ca024864b32054c38184d246a41da49b64beffa67993ffc72b10da0b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZS7J2348018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdba2c6c5d52b4a90397bdcf10bd2f62412b2b559a04ef7cd174119d78367f3. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZS1Z1628280.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6017ef533612799859713af185717cab39098d5657c68ae7709e2ac38b0e6ae. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZ5FN1729995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fe8d0c752a4e4bc7cf61a4da8c4e8d5ed6306e303aa983929dcc5be4ae8eed. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USLZJ1790190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad6c8ae0dc039c9932c85d4a1bdd3366c593adaae7cb181fc8ce6a01c0e6116. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZTLA2417084.