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 0xa4deaf1e9be391ed0341b41b65e3b96af32ba0012c1a394ef4d232ff984410a3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcd8efb0-2dc8-4d29-8638-4e6f5efa0f6f.json and https://artists.proofprofile.net/proofs/artist/bcd8efb0-2dc8-4d29-8638-4e6f5efa0f6f.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 0x1fde92c786bd3995456fa4978ed9aff7afbd463452517bdfe633148c2b384a23. 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/DEA451501150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6298536a7c2b865ad9e2cdeb1fcd6510e5e3f39b652f4154f89d4d2fdfa0799a. 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/DEA451501300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa7f18b9ef5f7d9b7015065387ad0860743a91a532311e4ec2f01f6202cb018. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEA451501310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39f97f85e0f355ca5aa9c859fb1a5ecd7e63674fbfa7625360e6839621f6740. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DEA451500780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba40230d528a6534a4aee21d63b9453217fdde087e35534615277b90491082e2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEA451500800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff22607a9f9f7ce4a1e947561333f03d6192a1a89f8113bc10c6cbd43ea69e37. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEA451500850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddef49d6ca1ca14a0abed7cf216163c1e3fe2cdcd7dba4ea95ad513014e38204. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DEA451709200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8e9db109f0dd1c3919b26c52374e02c3709161434cfe18d4e86e4622549aab. 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/DEA451707740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df1869951864c3467e5b1ebed66d47da9242c5646f3a74b43ad914f58202734. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DEA451707780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e49d46bdac473ccbcceab07f8733eb9d994efb61889073ec439fba589ce6ba. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEA452103040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8b52d01eb5d5523f6b964f6ab8a1c6db24d63e5c989993c7547a878ff656c1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:34:53Z), 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/DEA452302110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0449b3fd68f4834c2b47f87fd6f017d5e54be85bfe9088a55f8b22572389e86. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DEA452302130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af312daef75a279be5bb73323903a7eeaf58271733d61aba93d833b40434dbb. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEA452302140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36078a286ef5af359790037f237f42ea8de93d1ad1277dd679ba2f0ba9bf7638. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DEA452302150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b5c2e55befc8d0a25446e64f876e3bad066298840697863db0fe1b91fe7a5d. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DEA452302160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d17ad13e8b848953db62d3217dcf90cfe0907b8783009f3b1db868b4b81eba4. 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/DEA452302170.