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 0x222a1c8a1812106f1bbe4246aa470ee43ac4b5c86a641380215fa924659a9d1f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bf9406b-a5d3-4517-a610-102ff8b45a2f.json and https://artists.proofprofile.net/proofs/artist/6bf9406b-a5d3-4517-a610-102ff8b45a2f.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 0xa022f76ddcae470397e23b7b891b9c26760da95897769553ca15d425853a3334. 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/QZGXC2300759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a166e3ace53e50b81f4e009149678d00bf9513ea796c4f21fcc5f477a85fab. 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/USCGJ1403204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b06de9ff1d69ed09b79c6b666b2ebc3d7e4f5ff0233bd85c86a8758ea628d63. 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/TCAFX2130427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe051083ed6f38062f90c9f483937f3ac9dd074e1780f48c8f91a7e846c0dab4b. 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/TCAFX2130433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85dfd2e89c23c4796d8d6b4c60cf03bc7ee670614af0c307d3a0c729d7a62ff. 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/TCAFX2130436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edbada450d5e04672f96dac1e68e340723418775e547a1672f4e536ef74608b. 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/TCAFX2130486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3fd20814ef7029511b4d9bf231fab448b6dd0ed3c7ccf0aa98eecde09de452. 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/TCAFX2130440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e29396f22f86991fd1673c5170e0db17b9d39153904c922cdf7fb666d9011a5. 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/TCAFX2130445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4b91c39722e4a65d7e27f985b3a492152099cd8b88f1ff54342b52e2ca0a21. 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/TCAFX2130451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa022f76ddcae470397e23b7b891b9c26760da95897769553ca15d425853a3334. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGXC2300759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf581e726b8e0ada28e438cb4576b5163bd6824b5ffc823e5ae10cc78a68b05f7. 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/QZGXC2400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af738e9db206e96fc1a6a2c8608bba06b95b3d1550f27016327625ae05b8cff. 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/QZGXC2300318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0dd0c381aa84bf37bd070159b058d526eee8e6b99e671f4ddbcd7784229b32. 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/US3U81426127.