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 0xb659dbd1a5579bb050cb824c27749cb87ab36d4f9409d75dc1b6ca55642baadd. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96431848-1838-45fc-932d-8cb313be8df2.json and https://artists.proofprofile.net/proofs/artist/96431848-1838-45fc-932d-8cb313be8df2.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 0x17386f69ef9e94fd6a09b5698bfcb064e825b5a549c389e38d6713e320535c16. 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/FIH9R0400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d66f56ee1d2c5560d900cdd2c91f0dc094e74f4b2683c7e353098de1fb0c1a. 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/FIH9R0400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c84c0113254e6c81129bde2349708d858d413eadc1287d405a0c3a2aa3e8f88. 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/FIH9R0400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46eb4cee12665ee46749b2723c17d8c61f792334ede7d7c46b147b3162469757. 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/FIH9R0400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0ed906c7132c547371bbb241b3f97204c1c69a89e0390fe6bf9fde2cd510da. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/FIH9R0400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7689c38ff260b6a03d65e89ff6a7f0f2e8bf5807c15009df8bf7d0844e809343. 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/FIH9R0400013.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432c07bac15dc6b4cc1ee6959eafbd08a5d671f1b108ee61026794a7b9f812fd. 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/FIH9R0400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19d4d4ce74663950eb11fc867d9d8fb15f7424d9f2e977841e87e18c407735f. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/FIH9R0400012.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba48bfc9ed7bfe694230f10056730ccb76e3928e35c3b92b11b73ce77b664bb. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FIH9R0400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3498dd32e8fbeb7423a569f7210f5807bef0079ac61c1c32d4fee5a44203a0d4. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FIH9R0400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c607e1eb429e4dcee19287d0b24e91d19bb47c7313b69c50cff11f7b0a3ccc1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FIH9R0400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4d35849cee0bcc6cdae633cb12d2aacfeb02f1a810c3f3f97d502f937121e8. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FIH9R0400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c793a407a56b8a609284d6c482b3d4e5d95db215297cff58e36cec4e4b351e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FIH9R0400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4251e1ae5fe2d95a9967a07d879fbf1532bc46607750996918c246d2d07fd55d. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FIH9R0400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d59bdf105a06360b31b90e616f584498729d7650cb6e979404224d6354bc57f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FIH9R0400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf265dab6f36ba2b49b2f89b78d8fc0d2e91706309d28295b7207cf3e5be3eeb0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FIH9R0400017.