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 0x16d3ffd71c6fff4619a9fbbc692d7858171463a60a75f0bb2fdf9faae21fb634. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/970f7e46-7329-4006-8023-0a6b00088217.json and https://artists.proofprofile.net/proofs/artist/970f7e46-7329-4006-8023-0a6b00088217.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 0xac616876a08eda785e70c498e9c5a5813e06954eaf6d238c85fa9363b0c38452. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM21617741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad608d69cf38dd0858275b489a7d03a80cd79a3cb78f576530d951dcd83a49da. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM92140411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562c8ff48d42d9dddd5d645946e290125537b2f5aeaffb0ebdbf9c9e5b157e3d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM82204737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8156100bdd74d46ba0cee78f0b81eb9874eb242cf31bde76b89a7dfa90a00df7. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:52:31Z), 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/USCGJ2475014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb657cb8c3faa2ee9528a809726d963cb993fa96185c8797476f2d1ade8760042. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USHM22478977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdaa091cb8ab42edce3e71c030d8b00d2bfe82f3c93de86fd133ab0ca8faf17a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:09:11Z), 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/USHM82420326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe12d962d5c7a48151fb0feaae12b8e29b7cdadbb287fedc0162338958a6dadc. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM82553145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b00706d87aa969d2860597ee06c6d757aff0256f9d7fd39d69634e1ab6ec664. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM92546426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6caea221bbf5fb561234de90c16b050b0c9f454ac66de9c197b5772a389cc5c0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM92578193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a59138994bdd206286dfdca3dc6b2e657fbe4a02ef480422bf904ab7d64446. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USL4Q2527878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187be0b6429739a7934a4bff6aa15555ec3b151bd0afb95a4b01d6a68cad6cea. 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/QZGLS2189708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e551acf1ca3fad682138eda46b3b6912b3194544fb10dcd7a5625c59605c5ef. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZHZ42258035.
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
Ángeles Cantando Están (Gloria In Excelsis Deo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dfc95a13b5cb77a802f21685592744e9f678321df04909126fe835447b877a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZTVM2102844.