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 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 0x9381dbe4f12d198c82a51fa192ade04a366391050f4a29d7f5ff8cf9fe2c689f. 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/9b33f7e4-8163-4fc6-a62e-8f666f91cc21.json and https://artists.proofprofile.net/proofs/artist/9b33f7e4-8163-4fc6-a62e-8f666f91cc21.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 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 0x6a6e60fb4959cc26606294690a51441aa65876c6694a5697d97043dfe72ed055. 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/FRX872465368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c6468b1970414592103769fca45ecc8aaac7020e3ff13a0831cf61ca2af144. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/GBSMU3926253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fe2244ca081adc4ebe604b5c931a16157221b3099bd5d0b621af0605db98f2. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/GBSMU3926254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6540a2f3eb4b01ea4b7588e158e8c6629bd533ef50efb6d4e1769b54e313e37. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/GBSMU3926257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7472f9f4aee5b8dd77ff15d06634e2107bb4bdf8a71f0910c023c0b7de2dfe3e. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBSMU3926262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a60886497a8b253ce10be536daf6065ba9d06300b52cf71bbad167aded7732. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GBSMU3926264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e1b72f5e784abb075114c6c947a898afdd1f13e1e921da90aa210bafeb1795. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IDA661700465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725768d88f45731dbd7051c5c3787ea8c899009f497262f42e868d19b713bd70. 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/IDA661700466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1d7c3009d49e69e4edf2d9923c58affce343d0096a22648614ea4e6baf0dab. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/IDA661700470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485703c30b5d0f870740b900afef22e45a7cbb807c1bd50938a1418a6748c1ed. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/IDA661700471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab17c980c9bc8e055c17e2f18e0243e849172cad073a87983596a70b753b4212. 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/IDA661700507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd46ef841a9642af7ba7014800859985edf5ed34bc3ea6a3a398805f2908c21b. 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/IDA661700508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2617c5f57a1f965b5def7e3cf77ce13816e424a8ccc493a6255b41103eeafa0f. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/IDA661700510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56684bcb59e17557627a74b3a065476817a35be0c6adb16c0cd7e3aeb384ff56. 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/IDA661700517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107dd83900a3f660abcd06e21b694c05dd00b7716f3cfd031f5110fb086e46d5. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/IDA661700518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd724df4651d383c7cbc8353de46fb1ee43f223fedf2538e92bafd16610b4e21. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/TCACK1530613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a56fc0674eea23ec9811ffd7211a2462481b96fa235f3c1747426b9dea50c18. 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/TCACK1530616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d091fcbca6ce77857e2b7266bc66a67ceb228408956df1c759a54db3e4cf709. 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/TCACK1530620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889131296c012de05a2d216020c2667d8e171bb75bae961b459aaebdc3c44413. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/TCADR1893819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43f3f8b89b9d1a0caeebfb6f0c01e7f613dceca818b0217ffab5882de928503. 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/IDA661700068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29887f2447c13dca5ee5d66b49babfd0a6cb3938a164af24a11d118713fda03. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/IDA661700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bebc5515e4c7c40f57a9be6cd5826428bb1626771a2d108d9b1ed3ca219cbc6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/IDA661700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bea60e12120a8a84aa1845bb93f964d451b5fe4625ab8cd64b1516ab78b8757. 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/IDA661700497.