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 0x190ef4d52c2e28dbec18c96a0748865a81cebd2d1ad6c00239a16b8274253c17. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34953a9b-315e-48c0-a4a0-97067e0b02bb.json and https://artists.proofprofile.net/proofs/artist/34953a9b-315e-48c0-a4a0-97067e0b02bb.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 0x81f59294147b0ff2b7aa6532541e93517224b14e750df35330259ea7c2834417. 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/UKACT2030993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c8fae4991d4b1d7130845514f7a8a06a69a777154b6e018c31fc19b265af2d. 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/USHM80513149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf5f9802cbe04191e9d44e6120f8f2be3d0f4fce65243f97ba46ce7a2581208. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBQ491200729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1bcfdd386384705c690dcaa2cb0fa2af772cb71c8d0530a8cd1023b8b35b33. 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/QZMHL2337517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0efb5e98573387612364200e4031f30aab201c747270bbfad229e2d0232016. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZMHP2316765.
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 0x85fc23538542c3ea350be64b288df2fdd8fdd06dd7dac2f5062dc05729be8ab8. 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/ITGQZ2200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6399b127d5cbda2581616ca944fc77d68088e87b0bba90cad40715a165eaa521. 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/ITGQZ2200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32019b099aa54a51ed8df148bf7bfc7b99b81ccc2a46081cccd138919dca7cd6. 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/GBLV62128726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436e08396a445dbd0a738d8dc92b7630242555574148d2dfba33a3790f76053c. 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/GBJX32187004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2785876faded351ac8a08324a85410d1257aca6bd50a6fcc53eaa9d979d870. 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/GBJX32187005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13229a3b5de8a38ff3f1751edb8ccbf077e42c9ba4bbd20efed6824bd7441338. 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/GBJX32187007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d720fae3521290c6b0c3eedd04fa54711c226cd24ef61c0a0dea657681a7ab8. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBJX32187006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcceec0369d9c658cc39c89850be47dd99d3d6b9520ef830e93b06ba9058673. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2079227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6cd88e1406da4af79d36ae88d96d95959e6b8944a8bf156128829bc5710f60. 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/GB8KE1959636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520b6108f458d45c0b3c110a6d5337866c11c724d1df5a5a0c4bdac755650a11. 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/GBKQU2004578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa9e4c77ffac2a58544438b7ccba2c38510f9f69697bea2483ee050f0e2cae8. 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/USQNW1601704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d25e1ce404420c3719d8894b1da13b44d666a5adf4210c63c08dec9cc9a4d6. 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/DEG932100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b7e6911642cc6e39811a5354fc77f90f85ad19464ceee225fbeb6854ebe2a2. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DETB31800190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9a2ab9e8ffc3a0f9af228b0fb772f3338e46c136ddac5785f3695c2e6961fb. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/UKACT1931659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ab5d0f2dcafccb168d3ca08eda9f84550be9cd189421a4b44cff44004c4521. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEG932100110.