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 0xcb6f3c5965d3c0937f9c91b82d6afe0a8a52a58ebcc5324efeb402500519adb9. 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/567b157c-10fa-4322-9cd6-61d05f0762f1.json and https://artists.proofprofile.net/proofs/artist/567b157c-10fa-4322-9cd6-61d05f0762f1.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 0x3265e1aeb2608851b38cbc7041ae73389bccac9e03a8395cd194666d81fcd401. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLC062384568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c41ea53aaeba9d31b1d06484b553853569f3ccb0d7302a563b3ee4cf4ce2c81. 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/PLC062112387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81963d17d11e6535673a9ecef6db65458d0dd2f2e3caaa9d06d5fd30cea52fb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLC062112612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cba68e4f9f7d5234d9c3f5c8d9ba89c51473a57fa023b551a412dbd17d2b9b. 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/PLC062112614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d957410a548906173bd5f5c4f52cef410ec449c9d1d1699d8dcefa8785fc735. 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/PLC061908586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0650a7b4286ece27f1f08d458da22f44ba2a9e91d556185f79a023c3e91800f1. 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/PLC061908478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dae8fca24e3f7c686dc8faf9852d6885a5a100cc4b6ef9d4e27eff709398310. 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/PLC062508596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa00037dce3285c8d204dbc94b4b483a2a665665e55c4650e554da12a40bcf5. 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/PLC062510452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3856d98049eed97202812b3de7fdf0f825fa77dd5dd8a6d9cd06ff562ae20cec. 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/PLC062443300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2367da355c304a33ea1fb757cac6ca63398073b76614f1c4d7ac22f34d116a89. 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/PLC062439735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4261b8c6d283073c7ad1b52ddd7cbec6d47d48afe5ff47c35b83c209373ac77d. 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/PLC062379856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa07f96a1accf2044e6bfae3ba885a81797afda6fd48c2a0927c7ef4a608ce6b. 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/PLC062234361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7daf11275e4e626c8314ee763a0cf2adfa2b9346e646d18b1629f6ab431a4b. 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/PLC062228060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fff38ef1c56c061a19ccea0e693e6bdeac17ca16050c2ef7ae3ce4087ee8f8. 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/PLC062225280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b44c545351da357259e6f7e51ee05960af58a297a8cbde287ee7148099406e0. 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/PLC062115558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c41ea53aaeba9d31b1d06484b553853569f3ccb0d7302a563b3ee4cf4ce2c81. 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/PLC062112387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb185e38573115b929a01ae8c078bba52ad2b7e681d300a7ec6afbfde6a740ebc. 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/PLC062011940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfaf67954545b80d2adbf25dd9e80714d48e01cee4aa5a7001ad3d6d113b3ee8. 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/PLC062011929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170c9c56693799e19b273feaf848394a26cb998416064d7d6a79daca8ecf94c5. 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/PLC062011697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8337801c455994b210c5418cb2a42c8ebfdb0f1d2a488cd2689a28330e12d4. 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/PLC062010707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038f0d5ec5b4446300e82813809bc8caa8cc85be346d3dfb11dca7bfa9c0ac4e. 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/PLC062010440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92603e03467d5dc060a2d074bccdeb20db3c18c0586582f7f602e0371c62180. 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/PLC062010228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef7401980d0af56457bf73cc95860f6944d7c9f61bbaccd7035bebef21263ea. 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/PLC061908225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5ee0bf27ebaf88bbf7ec6c0b15cc668f35fa7596554fab03bad6325df1dbd8. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/PLC061908197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efa4d8ed096762c24060caa5d68f929309e6681a9dc8cf302cb96469b141c07. 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/PLC061907667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3349bf9c5ddd07b276dd84877eba338910375044b2246e4e2082f6b7b604ab. 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/PL89B1900196.