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 0x81d7f7e0b0fb3b52b7875e9f62ab2e4c0258b8c3b832620b0b4ba7475d0ee468. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d24803a-19fe-4037-985a-8f61114d9d33.json and https://artists.proofprofile.net/proofs/artist/9d24803a-19fe-4037-985a-8f61114d9d33.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 0x68c78bd6b08ba0eda9252ce30bc07bfffba2782c240e6949199e24e1a14a3021. 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/QZTAX2312047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd807996ac6d4f9dfcce554abafeb226a406bf2f5f5e00c63b5108fd868b7ed. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZTB92459198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2346a2861223d441d223c98b6e99c1bb6716842e02b1146396110d9c4e226877. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZTB92459201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fa8ce45cb6a60e72d241021a1618d8f53003cba0a4fde711e58afbd609222b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB92459202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4012762eab64f52e2ecc30df9ade856092507b23a643a636e540054644e08704. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB92459203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c3fc6db9b5156a8efc218542d3943bd552ce89e44ace39e0cd1d54fe0e5059. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZTB92459199.
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 0x02cb9eeaf3b89b083af96ed0937c5f7cdda672e15a81e1418dd03fc33cfae439. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZTB92459200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908b00d6c791f54147cc01b41f770932b10095b0a6fb0796679f1ada3bf2e9bc. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QT3EZ2449523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e12ef125b437da65eaa37817cd3860f6544ba33c65be5cd001905965006667f. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QT3EZ2449524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59288a115609d54ce3db7b659766c12e0b528b0f894367b4bee5c8112c392a4c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QT3EZ2449525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5a92117d6dbc0dc7c24135581f385ba94a9de919a35d54c2aa4b3da6e8fbd2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QT3EZ2449526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128b9bc4584eb7b0c2e15466afc9546352cf1f369adf684ba60f967a59f641e1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QT3EZ2449528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b39b42d366b1c0d228a93122b6d2e8f4427b35c71f8082496eac9954192e520. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QT3EZ2449530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd78913e929f4df918e8732e293e632a1c83114343cf3426ef970e5fcd92c35. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QT3EZ2449532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34b7df6de41cc71deb167d690561d84144d7ec02384b395ddc33d37f2f54555. 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/QT3EZ2449533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32487241f054d91c63c478e1504a87c21cda76fde89b6b400503e1a56ac8db4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QT3EZ2449534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122df0c9c25f14a6cb6e48ab8f70ff9d820db0476353b990466ef39e14975f25. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QT3EZ2449527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab1386cdf630c94a657fce3a8afc442e1a1db56c7c8999cb5e3375a53cabe52. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QT3EZ2449529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abfbbf40d5c7ef0e4e028d5100e14d9eb59e15d92093e040482f48fef2d2020. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QT3EZ2449531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e642dea9fad9d88b38fedca3682e337a2e49465358b98689cb1b0c50dea0ee. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMDA72426571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a486334a205dab74c0691c07f220e871719fe6ff3c57dae56acdec821399a29. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMDA72429869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe875a8557970b49845237ae18c803eaac39db1fd7c5fb46c7af550038bc13ab. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMDA72429892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45f7d8a3fe560993fabdd4d833d4a373be5c635c3c9128fb249f6dce1e1f37c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QMDA72454597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d8c800cb0a6224d6b1b083b27429664544089a72cc019381b68fbf5d9068d1. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QMDA72454611.