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 0x73ffe81a31b69b7693d3cabb34766ed5818477b0c6917c1b8108c79c1313d1ed. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e94850c6-d1ed-4fc5-8b95-97a1f780959e.json and https://artists.proofprofile.net/proofs/artist/e94850c6-d1ed-4fc5-8b95-97a1f780959e.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 0x98d351d80433012e415d9b6dcf01450e2c18186604a6d2b75e4af7ff57c6cb8d. 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/TWU712004282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd14a7b3df41120771da4f209794130d6c957cbd70d5c66db111dff03e1efa6. 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/TWU712004283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ecac0532644d18093feedd6d9cd50b33c2ff5d861ae1aa35a48ab62f30f983. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:08:48Z), 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/TWU712004284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5510dfaeeaedf8061b775d38a633e94fe856eea9696f897cf23ad80e7a6e607b. 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/TWU712004285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55646b9195431fc53d73fcb4edaad273fd1582cc8dcfb628d573239d5e97c8a9. 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/TWU712004289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0e007fd573817e02cbcbc19ef9726d95e93ebaa4f006a747fa54d1b0306a4e. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TWU712004286.
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 0x4798c2cc077d8013f1fd141cacb0f848c84169f9270eb9525ffb9db8d6661cae. 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/TWU712004287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb33287c38914e671f965b0d6e0a00188df3cfc2f55304af998ddbd3a212b34. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/TWU712004288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff853460422c4d1964636183a2cbadded63429898e2ac8ed3c73117e700752d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TWU712004290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe066746a346fe64a353447c67522313b3c64e13d3e733338484cf5c30bd1630e. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/MYWL32110001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21f12cefaf03ee3a213b2e0d8d44013e021c96429e96ca578fd766a9ec0eff7. 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/MYRK11710782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694ff600967a43d0260b9e5cc7604419019a9014a2ed5f402821da4d315ed042. 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/MYRK11710775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2e6473a5d48cd0871f383be4219f6aa2b13ad5c77e6525d42c58e692f43d66. 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/MYRK11710781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f43486e08f3e14d9889c2593039bbbf6d1a15504a7c359d79bba64df05e809. 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/MYRK11717071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa231e1778445c402fc438c7aa51e3e2c21c6b2246a6bf890b05f91fd66f6a2e8. 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/MYRK11717075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7eb5d102ce0f317b4f48cbcbdddc02ce19f613655a1d0afcafa50bbf8bc6d3. 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/MYRK11717076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd442b59abbafda68d4a33c1f95f129784835df01bc955a8f0f54d02877a761. 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/MYRK11717080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf6881c9ec5c94f7aa953f170e63338dcfae6260a11bf86947d522e49a4b244. 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/MYRK11717082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80f56beb9726282e88e4fc27da953dc9bebe882c7a4d7dc35478185e786f407. 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/MYRK11717084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded179fa2881d03aabe679b78d31a4179abecfeecac5a382fc9c2b05e6fef724. 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/MYSN12500050.