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 0xd76baf50003eb8e20f917043f90bce7eab0093ef64f4df0a43c85cd72cb4b084. Chain 2 (Bitcoin): anchored in block 954062 (2026-06-17T07:39:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45cce7fc-24e4-431f-b578-defbfc6590be.json and https://artists.proofprofile.net/proofs/artist/45cce7fc-24e4-431f-b578-defbfc6590be.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 0x69473a518dac8cdb339a67804af6ddd9f94a928aba29014e150fe58f3d28aaf2. 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/USMTG2310702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef8712b1e1265d46d4d1ea12cf21d41553fb6df1e9849744f58ec09e535169e. 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/USMTG2310703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe082f45c56f27737d14e72724de94bee68de12932c9b760abab5d6bd5ff0e464. 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/USMTG2310704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3349e0cf51102e13bddc4abde5913d2ceb8883bed90b7732c29dce8e2d3635. 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/USMTG2310708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe559fb476cda3dc501d1a5ff966602609ae78d1961a42c9d841db87b57317c66. 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/USMTG2310709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73310d44898b425b31195755c6319cf60190c0c0dde8e6efc0c804f92cff7b4. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/USMTG2310701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf657af86754bed1cc1c36c233106f9c4aa98c3d0bdd5fe5d85520c0d05b11a3. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USMTG2310705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd369d9b634e60d4e6d6a9e00a15158a3a50d5d9220fcb22e79212bd2802349a3. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USMTG2310706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e544bba8e14a8f29c9be111078e5e020c5ea3a5357d18dd3bcddbe8b788398e. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USMTG2310707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a63c380a40515b0040547a4d8046e96eb04624bc0b16564d0b0ca54666bf21. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USMTG2310710.