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 0x8884589b249edbfab02a593ef1c6e3d05c81add254ce647f501f5871cbdfd232. 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/ea9f5a91-b8dd-44c0-9645-2a4890533ff4.json and https://artists.proofprofile.net/proofs/artist/ea9f5a91-b8dd-44c0-9645-2a4890533ff4.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 0xa00956d041064d33671ab842cb1a67aaff0a8eb7754ec86944e96d3650ad542b. 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/QZZ8B2391566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f3c427103080710c3f527e51283ea12509f171072193db5b8512c2f2d6c717. 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/QZZ8B2391577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fca59e544e4cf47dfcbcdab71da88594df08d8a0d2f969291ed2f897d43f6b. 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/QZZ8B2391597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeaa634860c98ebc65441ca7f3d135727295b70d48186cb357196e0bc8f3d54a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZZ8B2391557.
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 0x0dfdfe46ecb332b3374a285dfe84d10ac4e90d76abd8bc0647a1cb86fedd7644. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZZEB2313861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c5ae73e4ad745ee79ec0eb5c85de815884651b1eb6974be250af69af20174b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZZ8B2391666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b6dd50b5c0b092ec7c6a17c8f99dda0c09d47151921e2337243e625f712dae. 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/QZZ8B2391574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d8abaa0dbf5c0d549cd476d8b8a5066ec3f1f9cf48559a47bb3ff5f6fc9fcb. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZZ8B2391603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9566cfab2110c2b8a8e6eca2e782399d104716bd9167457bb3d3bc58a41e08. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/QZZ8B2391639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec643697afaae66f75938bd81f51992085335e400e416db8d82321d8639c939a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZZ8B2391656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a56c592f08ed61f4d2eede40e2a839a38a97bf96f4a4a8ca7d2bdfa059eb54. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:40:41Z), 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/QZZ8B2472717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff42da936efe89f55ded9f310aea81fb7f4449a616645d4cafb8d9abcd1fc90. 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/QZ5FN2578768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc0b9735092f4606cfca4db679f70b15bd76bb60c34f50bc564682ad6023992. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZTV32567406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccbc49966e67b4ffeffa204e6bd5727564f6bafe21ed40f6b055cc71bc27cc8. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZZ8A2559351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680e2243bd16bd7a7f98466dd4901ca1333b7e31f3717fc7a544099c26713338. 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/QZZ8A2588056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6574e96120994d3b79e9c05eebd4075df775319f0d19f0ea4ef8ed95a00e2b. 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/QZZEB2423951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b7fd9efa0ad6a5e66d5d8ccfc1d82b638fa1343071f4a8a383171d29ecca42. 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/QZW9K2484581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6879775d1a943a1dc0c40975fde39c19be16c4af95b30d25c17ac4d5bddc8ca0. 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/QZWV32419690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6574e96120994d3b79e9c05eebd4075df775319f0d19f0ea4ef8ed95a00e2b. 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/QZZEB2423951.