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 0xea7a639c2505b8699e852cf109fa27690dbee458b2c5a54a145dd18a41de031c. 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/eb9b1874-5a3f-4aef-bb06-66cff2a737df.json and https://artists.proofprofile.net/proofs/artist/eb9b1874-5a3f-4aef-bb06-66cff2a737df.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 0x29ddf74703d5f4d8ac6225dd3d4cf92f39b7a207060faf00049e6047651208d4. 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/TCADQ1832987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3643d83b5a14b568e793b9b0a0425c5c02ffc31ce1793585267f6d90cdcf6a. 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/QZHN42077948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d27237ac4e1fb9665180c5c52bd19619e314269bf34df1d10b8a3a27586eca5. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZHN42077947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb449a38df44d3d4b8c082281f4e1576ec4c1092d24bc0a9e1447fe371942f71. 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/QZHN42077944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aba0f15b992dbaafa365f58e35954b3d7daa7f504c86c3b42eaf796b3a01abb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN42077949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e6ef3368d4938664fd8f3e732c27aa400e451283f4bdd7af63415d36655730. 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/QZNWZ2473798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4501a3c01df28f98d8762c6a28f6a66fc4ceedee79ca271f1fe187b729b540. 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/TCAHX2485174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db833ffd5fe965a5375d5d80681732e8ff77ce259ff21fd372d612f2bd963ea. 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/TCAEZ2037580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72db5dfaeb26179f5c4cb516c51c8ce74d3cae2e22249122a003fbc5a12a1c0. 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/TCADU1833613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d3a1cc41845566d0c571c74cbe445851f7556d3d271f4bc76bf13b34abad8f. 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/TCADU1833620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc16fba5b3dc391d3a42cf8224a07061f102e63b38a1942982a56b74a7c8682. 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/TCADU1833627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f8ebd078c286d1d2d9d6706e5b08e1e24afe59a2398973d7c3e7813ae0e7eb. 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/TCADU1833628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde71e445f6aa597e270e70a35baf29611d4cbac8f6f6513bc9b52bd81d729b7d. 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/TCADU1833629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3b7a52340837a626f7236515dfab216b957af6666a8f80b6647891efeb41b7. 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/TCADU1833634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b88e2a3a8bc0aebc006309f400d9a318edfb7ebcab41b6f726afd464a3129d. 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/TCADU1833636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334a3e709c112b93ec158901b6dfa5e7467a635386a35e488df9fa85be6a9741. 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/TCADU1833638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a469969f69e3ac83114b748c18c167ffda26b65441d0846d285dea0a5a25db5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAFL2179090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27100772ca98c5df79f2619bde559f489cfe5e46c6a68300b6574d3c54acd078. 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/TCAEN1958540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2ef09a6a4731ce1142d89e1184acf61189f0a63999ef1da6ecfb03f564e352. 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/TCAEN1958564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f54a3763f97bc091116b9047013a5ad114d55cea7c9af5da892fd006b8758b3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZHN42077945.
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