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 0x207ea34db99ba6f47176e2a4b5bc39e09f027f34eb9a051ae58dbe1e16ed09c2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/153c872f-ee16-4e43-8c62-4ac9e6ee84f3.json and https://artists.proofprofile.net/proofs/artist/153c872f-ee16-4e43-8c62-4ac9e6ee84f3.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 0xe797a1a8c0eb043145685fc18470763785997df570a8832ff763c8caf4497ce1. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QMFME1557449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1d3942c07fe70d69559dc238c333d3a4a9dd4def1cad486cb27687c3ef7ff0. 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/QMFME1557450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81ea336086fa1e16ba8fe46a439a98fbdeec6787ab8c896b1843675831306f5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US2BR9703020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3519128d6f9469171d6120ed21135b05c0afd0470cb7f91cd8ee0846fe9727e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US2BR9703025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1774b86d5d5ef5a9aaf6104cee6c163d4237df6d86a74444e7b0d798cd63c2b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:39:09Z), 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/US2BR9701279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6d17acdfb1921e260821e8a1d70da2e24ee0d5196c3ae07ae38ab4a8b07d27. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/US2BR9701281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5eb450bf626c43c4ba651bc1e94c16e3cc382aebe42d572fe59e193c03c623c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US2BR9701284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a9d6ac86f3965c34c77b6e17549f1c7abb9d1c39420392b25b9dd41368f8e7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:20:56Z), 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/US2BR9701285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390b1b4fdc2617d9eec9b07a5963c2d5550b353a844c29b5001e2d219f1e7a45. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:08:57Z), 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/US2BR9701294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71b53943b6d27b0cf02db13d0b90c4a12a765b44e6601e11b81f43187f299f4. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/US2BR9703033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576859e12063d2a7c3474d55b80f6ab88c62597c99d5622b3ef3cb3399117bc9. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/US2BR9703038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc844a947d593da9647d457d27d299c85e4b0d148f2aa4b1bf8a4b65c568c4116. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/US2BR9702995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcb346ec2847c38b8067d2f06f8fc531729e40bc339109b7c4ad99ddb9c60e4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US2BR9703031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e38ab90ae1cfd47e952c9e341022d2f847e611e3342ed8cbdb480a9e4f4d2ea. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US2BR9702997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375ec6445893020da7c371ab989b8927a2bfe6acdadbc16eaf1214e8aa5a229d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US2BR9705035.