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 0xf3646eb9828449aa1dd41f723edc523eac0248845de7fbee009b2152d4a1a19c. 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/311fbe51-e6e5-499b-bf63-498aa732471c.json and https://artists.proofprofile.net/proofs/artist/311fbe51-e6e5-499b-bf63-498aa732471c.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 0xb9e270cad8de4dedbf2281b900aadbc1abd999588aa56ae894efa07727313480. 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/DEXW62400235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1045821870779b888b0b91daca81e0a75dedb15825cf72b11a8c1c9535cd4843. 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/DEXW62400198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecffecf05e235b093a67fc5d3e397601141ebf0513db2047f4d69f249a4cdc6. 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/DEXW62400165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b02dcdf6a194beaca126908bd85a357958bc0a9eb2d83cf560179b4877c9144. 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/DEXW62400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b39d616350839ebe446879ef2cbc1894d0cdb89ff06e66be463a1c1e494a45. 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/DEXW62400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337766d440ca201169ae1ead4bd6121cfcf2234265ca3ec8aaf0166485bfc46a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEXW62400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ace41e941ca1a58d3507fd872fa1cca9f6d2ea06e1651919ad6c1dcdcf3c4c4. 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/DEXW62300377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac504f4d0c2b90d74834f0e1850a0da96d277c919466863ce7c7bbbe04951e6. 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/DEXW62300279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41073c1c17247400b4763d1acc905f00e2d86a9f7b8132c0fe0332f2acf76280. 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/DEXW62300276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81a86013ddbc4f5f7ed4cf3ac8c91258e1f9623af403ea9949eb3025de91a65. 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/DEXW62300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4295875058bdcdd8044ea70aefa9fd3b342358dfb2705cf570c8332933d1adef. 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/DEXW62300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994034ec3a1b815b484062a06f4a3d12c66f7df4c0de82a7c369d0a0dbc1fa0f. 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/DEXW62200199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1404bb2b636dd61bd4bbbc2d3b1f0662ca16da58568399b1d6076e0f6700ee. 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/DEXW62200132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239a036cdce05aae87b60e4f6e51a6f9a1218b7cb1f7054b5e280919d2152cf4. 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/DEXW62200093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e709cbe0e96500b075de09c5308b53cc68c0c21203a63d1e8fa5e8efad1956a. 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/DEXW62200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27c8662e74757d1cb611c7668a02698ef1149787abb052c95111dc6470400e0. 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/DEXW62100196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c7202288477c6f6fb9e2c6a835b55579705d8298105a651822d1e7015bc47b. 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/DEXW62100190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7717993a6cb27a6822a56e01d5b461a3f9ad5abfb65f5ed845c182098287b4d. 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/DEXW62100186.