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 0xf6692ec2721f0c89ebcdcf2e4b6f08021a44808cc8ca75e910a83f2029917e05. 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/606b26cf-f753-4519-af47-052daf574088.json and https://artists.proofprofile.net/proofs/artist/606b26cf-f753-4519-af47-052daf574088.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 0x1353e3dc1c66154b7d83901fba368311bf587ac1d1232d01a1efa5607aae0fb6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TWA750800602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ffac896d9028cf8fc54c093bcfbeddc6ec4253facb9da2fe2256cb264b8e39. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/TWA750800604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfcedbc37ce7a0f0d663b9193a82c93018e27502a4dac09f91b9f74bdaaf4df. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TWA750800605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a94f7f652c17dfd078e0b86e1f6f8dad5b2c1fdda41f0e6a5e494a5f029c66b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:05:23Z), 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/TWA750800610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1900d3484b861bc16502f9ade00592261220bdcd60daac2bbdfe0861f99da26. 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/TWA750800601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1353e3dc1c66154b7d83901fba368311bf587ac1d1232d01a1efa5607aae0fb6. 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/TWA750800602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f792402b5f3bbe39922d00a6525caa891ff8a4b582ae94362ca04b8896f9afe. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TWA750800603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfcedbc37ce7a0f0d663b9193a82c93018e27502a4dac09f91b9f74bdaaf4df. 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/TWA750800605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4643af719ef13956ac16e268de9d5649c1db41640c1fca5633ecb44d5a6c6d. 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/TWA750800606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12549207fef27fb253281701b8bed258d0a84d53d76df352e669cbd57c60201d. 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/TWA750800607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c30db09658257fb12a659fe9a9ed2b9ebad7fd187ce7079d317acb2f56275e. 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/TWA750800608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efdb482c8ae4a97dc2074f75226479269c2b6637909f27273acb59f938c3027. 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/TWA750800609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a94f7f652c17dfd078e0b86e1f6f8dad5b2c1fdda41f0e6a5e494a5f029c66b. 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/TWA750800610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9fccef0d4e8e80c1c11fea444fac4b45c1e2a9bf0789e1ccb63cc44119930c. 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/TWA750800612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cfa4d339eb3eebd27956e776d356cea98b8af32252fba74f289571ae3e60da. 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/TWUM71000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6b004ec0df414d82c3363dff31d86d3ebc5be5626a523db54f1243be417b38. 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/TWA750901001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa34f63f7e3e83495431792013c52e47f2f201967205b7f22bd8be6a45fd4b96. 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/TWUM71000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c221407b9b2cff7b7f65c8488ef731348c8c1f9e4e7911fd91a29bce376f75. 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/TWUM71000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52b3b446a356af37e26211ccb705b91a98495c158a8ca0cf5aef94780e425ad. 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/TWUM71000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0388a22ff27d60dfdc6265b0ad1fe99409777589d3769c1fd46c583259a4d33a. 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/TWUM71000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac884e2bc4b1603a67c58f4be32a02d8f3222c592146e89e3cda06d7d32dc2a. 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/TWUM71000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bb2456f4aac55cd659cae94e4c8106c0db1745da01997e540322a53b51b3ee. 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/TWUM71000040.