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 0x5f8afac44e70b1404233d435d43e2689c9f3d8a21993343759c3e83e12643751. 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/938e3249-4e53-43eb-bd35-d263b2436d67.json and https://artists.proofprofile.net/proofs/artist/938e3249-4e53-43eb-bd35-d263b2436d67.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 0xb7ad5fa9f564dd954143cb7ce3964d59f93a46d163c701f3d05f806fab317cdc. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:23:49Z), 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/ROMBA1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fefff4b2bbfc012e11cd4b2c5b9383c9285520acefce9b51c67291797af9459. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:22:30Z), 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/ROCMA0901877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ad5fa9f564dd954143cb7ce3964d59f93a46d163c701f3d05f806fab317cdc. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ROMBA1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc80fae39ff0e35f557297380f3dcce7a5621b7aec53a267ca37832db0f6483. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ROMBA1400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4aa81a978ff006a8f8107429feb85033a186ce2b6c61bcd9384c31b06d27688. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/ROMBA1400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a3f44e90dae2c70514cd71ad7456a001a63af90da8b433c5e2a970866d0519. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ROMBA1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405cf700137c1355d31390a0578ae93b9d609bbd8432c855af3f8f4d9cc348a9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:10Z), 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/PLA281800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8acae2241b2aeaeb359ea24cae6a87200c396f26ea3a4f410940d99a2f17425. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/PLO381502944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc974c4b6b2fd49f4ef37f978d6173620e3a97820001e9453c0ca48ccf9a6914a. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAIK2447460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef4a03ccfccc588b633a09f61506d3098b9b98c35155e77cdf5f8608f7c149a. 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/TCAJC2406604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a3f44e90dae2c70514cd71ad7456a001a63af90da8b433c5e2a970866d0519. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ROMBA1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9716399feb29a6f2910966140838877203ed737915c56ed010fa024df438ea. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJK2539293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0f00439dd520199343a407bbd10e0f6346dcc22eccd5189b82924d34919524. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJL2541881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e16af446001c3ed4db541a8c59bc41245b6e81d231f03bb9ffaa2d53010d94f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ROMBA1500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450cfe93d4375339fa6d4807336f2c829432b832113f40c7f43b9586943829ee. 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/TCAJN2534833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a62dadba70d8e52b22ce8600fcc3527418f99d541e27a4f4d01f3bacb2449c5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ROBIM2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcf976de08db52a5660bca680895f99c42ed15dbc07d1218337e94845a49576. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJP2518051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e59a4fb57d12879b25aec3ffdf9d59bcb02e7a8ded014499c19388a9691fdb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJP2536535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a22a70cef1a2f518b8809ad9a3feda2627e3b1ae9333f566c03d494b10056da. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:05:47Z), 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/TCAJW2596591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ca5f42da5a8db79ec1b48249d07e73f38dc589f1bb6b10cb7d1e2065d7cd5c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJZ2545180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e5e00f7acf94cceaef4350f158d2b5f85eed9d7d497ef6b1fc7666de7dc61e. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:28:16Z), 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/TCAJU2526023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3c7a076e9e80d236c1b166e672931526e495a4a21cf7f2edb9c254ddadc7cb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QT65W2574140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c7b2bf3078f64c780f3ba7dd2bab471e0b168e02b015f2ea8192fbc7c45864. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT65Y2588772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660f23f56b90b15a1e56ad6e9ec26019a02be21325fdfb0a21e401c989c6626d. 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/PLH751800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660f23f56b90b15a1e56ad6e9ec26019a02be21325fdfb0a21e401c989c6626d. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/PLH751800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660f23f56b90b15a1e56ad6e9ec26019a02be21325fdfb0a21e401c989c6626d. 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/PLH751800016.