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 0xb76eb25dafe59baa23c9443cb6420bada8d5b615c90020256f560c9f414fbb07. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e1b93c9-66b1-4f87-b6fb-052612bfebbe.json and https://artists.proofprofile.net/proofs/artist/1e1b93c9-66b1-4f87-b6fb-052612bfebbe.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 0x403109849636a6968871adddd141ad40ead59fd031b6c21888d5767ff7832037. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCAEF1997386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec7cc1ff37750521309c8e9fcd67a13db6bb304a5efc7da7009e850cb8f2678. 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/QM3DF2000921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6a76f4b6d7d470dea15f38eb86c705b89a8e3932337c7981d275e050ec6030. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:52:04Z), 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/US3DF2144396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d18e108531b23cc59feb8a1aa55a9484346aaf53387ecbb2192bcc4dea300e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US3DF2144401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecc05cedbca3f13f3a04150fa74528bcd6250dadae38545b4219bccc108dec2. 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/QM3DF2150690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e0aad08c5ce3ec69fb9e0a510e18aed392aad07e94480e0a78e33899e26615. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/MXH152200321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a54fa76730b996184803783e4ba989732a96d6e18f93c3cdd3389601dcb1ee. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/MXH152200535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845e27080cda88c6ec68cca167f87c7fcd036a3f2f952ec8638d733402fd0db6. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:38:21Z), 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/MXH152300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7992148f34383a74a7527615136d240f285ffdcf219eaffc4fdd2af905a267. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/MXH152300186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b968282dea4da966c2b43a2ed2a292124e4e7302544d4501dc88a4b758d5ebd. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/MXH152300218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ca5909b914a97a5daf7ae491366ca31df18e08a9a2afc660821bedfe9eab3d. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:23:06Z), 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/MXH152300508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5321d58a79651d46011fe0af3d23844e8003ce32281a64d0c43fe8c398e659. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/MXH152400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a601bbdcdc4823480b33a7e2ec3a010630060baaa4053897e7a3118bc293f55. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/MXH152400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3b82b0ffeecc5d83545765e858fa6b5a51705f1de4bd2b14f8720729f77be0. 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/MXH152400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7a92efcd7a91c293f73947953d3e8a6f52d8034776a15b54db69e41352759d. 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/MXH152400049.