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 0xc3157b055ab8791fab4b145e6a98ef802c02081f8a714b80badf30cfc284db86. 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/653a9083-f482-4e30-bcd9-666b2337881e.json and https://artists.proofprofile.net/proofs/artist/653a9083-f482-4e30-bcd9-666b2337881e.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 0x5d1d6f5f5bbc3264c40c4ce04529e87745c16bc63e69cd1422844723d50186a5. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USA2Z2001878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4916ba7a62570639abfc5d2362bd9494415ffa808b487de5d7ac843db4295d57. 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/USA2Z2001884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5063616f7e3f016456198803324c3eefb8429ac9aeaf5d2ac658b1ec4afe96. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/US22N2417501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50c0df3af6fcb6d160d76da36e0549f5c208d7fec4def67513706ea1f16d489. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:09:52Z), 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/US22N2417503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14036c51248d18b9c62e019f3f3bffc558b22eca76af8d6db9d97e0d5889b89. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:04:04Z), 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/US22N2417504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921a0c3aa358b896a3ca656d61524f98e60e0b1c3cef702ed2e219d0f9e440da. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US22N2417505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcf17b2089a212924b4a600e1a15cf89eb7ab4bf6367a977c93d5d52ebfbcac. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/US22N2417507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fbdcbf48eea9ecfb85fa1eeb6ba49ea6493ffc1bf89ddc5e0023ff6af05ec9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US22N2417508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631c937002398476b23e147e410d90af6400c1851e33e5395bd588608fadb3ed. 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/US22N2417509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89531c581ecf1a55fe1f6879e56e0e4069397c7a4eef84b181ee08c6c37e40d3. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:54:40Z), 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/US22N2417511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a90f39d0f9b3f33b364c9fcf1fced502ce3e97b653c48b61229c10c661435c4. 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/US22N2417512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5063616f7e3f016456198803324c3eefb8429ac9aeaf5d2ac658b1ec4afe96. 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/US22N2417501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6039db4b14b2c07f0973af0c934e4f3e6fd78fea3f1ef078f0a0c0086e9fc1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/US22N2417502.