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 0xd9c366aa2a61b3d78a56d44424d26ad55bab82ac6e2faad3404db653405bda38. 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/e8a9bb9d-0f0f-4a11-b718-230ca8ef9be3.json and https://artists.proofprofile.net/proofs/artist/e8a9bb9d-0f0f-4a11-b718-230ca8ef9be3.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 0x5273876506fdd2e4b70b36d5ee4f35e6fe99a674adffab1638dd38edff036779. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBKQU2192290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7903a8539cf08f84d86f2f2b2f87573b2207aa53b57de8417efb3af21f53d466. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBLV62127543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6f65d3a50093cdb6f1914fb5186867672ea3cceccf165f83b771dab9351d69. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:05:13Z), 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/CA5KR2297297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b12b60018876550979ebe722d80a7161b62b9331dcfa2fc2385d03a4a792dc5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CA5KR2331870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fe3d6437aaeee8bcec7979f4c042ee52fb0be292e242d052687d1d12ef54d7. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/CA5KR2371585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2e9fea2f9584189f3b271c956b152c04b3b00b975520a3294a6b498783e39f. 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/CA5KR2441447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91dc8372f0e6ceccc91541fd1f3b5d5ef228b608ad025bc7cc97ee5e69bb73c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZG2X2421299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be102a2922be85e6995bda2d9e8e239145b9290bf7eda27d6c08608979cf67b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZG2X2419309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770e9906392af794419272a363c23f2af5f9285e1ae8f5cf4b7d8fa25a23a4f9. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZG2X2503163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561e171307120e9395e05c0fcfd66a757f4c664499e1572d843e80786983406b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CA5KR2362946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fd3245d275024f0885331e8ed748824c4199c0a33be2d9eea2cc1839f0c2f8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2286748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08294924c465fe3603335e719d7bf1936fed16974daf27c95c466642eb23c894. 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/CA5KR2307943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07333bfcc4645c895dfb38283bb7c34e346b9ae7b022dcec6bfeebba6fe14ad. 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/CA5KR2311666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d29f38895a1e1ffb2a7b538a42b9358b25cffba54053f6dd3fdc9b6aa75cda. 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/CA5KR2433739.