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 0x9074b6020e56f55ba65877c7c357c1501e1722d8edaafec009218a1127ec6ea5. 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/8556bb71-296d-41d8-96a6-889e4d52e835.json and https://artists.proofprofile.net/proofs/artist/8556bb71-296d-41d8-96a6-889e4d52e835.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 0x1ed8b1f4be6a7ee4f38303dbf97fbedd18742e11d91d16f847e5760d013fa85e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHZ32193104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7f4af84d7710fc7c05b77c36f6b2109ff2bb559838d91b67dbb5479e6fe97e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHZ32193105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f12dfaa5d4139779d5b11bae4837777bcc94ae5d312f6ad1cfaaab6da4ccba. 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/QZHZ32193106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c9a39f43d9f553467b5576a68a26d3318a6bd88b71769d212c84af167e07ac. 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/QZHZ32193107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb17591235cafbf17b7f6a1d245ecc6bedd4690839d1cc61aaa701577a67e81. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHZ32193108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d35040e0705ae5c5212df3efe7e1b4bb3083f2c285da1b3e8aee62b9400bd90. 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/QZHZ32193110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e536780d4da149b38e7d4bf65b4f5b0f93280e2b91e67d6099fdfbe9237901. 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/QZHZ32193109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf118c56f3f0d02566629eb5703b2afcaac142bc5235f4e29779dbb086a08ce6f. 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/QZHZ32193111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1c49fb19c48f2828d42b4c25b131af575022ef85e6f091e1342c50015dac8b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHZ32193112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99847b3e0cbf8e235f1f87768d1b6e5608062c4757250c7c6b7cf9c5332a45e4. 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/QZHZ32193113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41155cb6532ce7130e3d3cb329fa43baae6a8b45e08a031ec27507e4267b4a7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZRP52106772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7255dff0ac6f70f724920db986d8677b046d2d2c2d5bea03a82062340305b3f1. 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/QZK6L2355028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b963eb860d40401a4b720590a20fa14da39fca4620039f54d5d147d20ac10e. 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/QZRP52107847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf6a73df53de587a929c394181af8f557f5614e274ed39c2824032c826edd62. 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/QZFYX2246959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19082e49a003cde4a68c50edb6840bc979f1eec6f6e614324dec4a9b73163ef4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZRP52107848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42e4425298557018d95c58a164248842884cb4650036a9e47f047e07154eb9b. 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/QZFYX2246960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3697558141372139581755373bddc5993a9c5276a4d9258ad6f1e833b60e8687. 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/QZFYX2246961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41155cb6532ce7130e3d3cb329fa43baae6a8b45e08a031ec27507e4267b4a7. 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/QZRP52106772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1177f0e375c8d4e2c11eebfcae1c514d8c63dac2b14bfc2eab6ac38bc95ad72. 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/QZFYX2246963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca2224d7abe2d5d2dc31467acd6e8477b4adaa04c80af32ae6f4c627cfa1d8d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZFYX2246962.
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