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 0xc2a05c090a35fc458b915c7ef56bc09b6b9c7f0d66116b71ac838349782b98a4. 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/7a19da96-c2bc-45fd-87b2-8e6a78bc4c58.json and https://artists.proofprofile.net/proofs/artist/7a19da96-c2bc-45fd-87b2-8e6a78bc4c58.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 0xa5b8df9db96643fe29cac1e664b482eed5751681b9f7c70e9600de356f653ec8. 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/QM7G91633248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61599b9a5cfdf34bb8a686ba3a82f73321908053824cd828bf32a68213d4d82f. 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/QM7G91633249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c89514a087315711f20301c293221cfc7228e00a8cd1b4400829304aec631d. 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/QM7G91633250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcec2c0a8a10bdb23c7d28815e7ca4158ba8337947ec7ae80fb28fd240f3b1b4. 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/QM7G91633251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858e6b75dc3aca7ffcb132415340bea30f222d4a4074aba3d48318a829bf8946. 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/QM7G91633252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e607bdebc63af33323fe9b99ef7825085b3f8e8a6d9801862b5d9d4c0d5e50. 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/QM7G91633256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a863d5cbdb438389c96b741a695945d45be37e4b3937e084842fa573bc03416. 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/US4KC1173701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908646320b8a96630d8dcda192b988e6201088a40aa18bfa7509ab6dd97f3417. 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/US4KC1173702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb402030d36b597aa889baa11d2c7ebd86687188efa5495362268c486d48cddc8. 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/US4KC1173705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0c7e451f461003613cc1631ad9b612cf95382bb2c1a0da103075756ed96570. 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/US4KC1172402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f48f94d0685c24735bf1d418dfd08c3af8ff9608375ce0957862c1ee80ce7cf. 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/SEYOK1662313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9d217cc3248ccf761b86c3f04bae91c9b4b96bc8ef39551126d98122c9e06a. 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/SEYOK1722612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1f7df37c87a0a66fbc82f779912001b54fc5700e442b4b23b133aee634b840. 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/SEYOK1722613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa96dda6d2ac5ebbe504e5f9248b51b1f32b0c0b503f239bd2460cfd9876505f. 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/SEYOK1722614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0603d1afcbe0a2d15fb569d94a099ce43b3843addbe3399365adc745da6663eb. 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/SEYOK1722615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24884241f2c889d44a2ae107ac91bb6faaff32bc3988a77d92f100cb0f073b28. 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/SEYOK1703027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc227d1b695ec784966c3726c2e4b5e2424d4dc29b7b2b7bc7ee01f59ed74324. 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/SEYOK1703034.