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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b42ff36629c7467a636b7abb731e1245cbfdbb40cd0eedc630f765959c13a5. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be4d534d-f8e0-4405-afc3-3496040ec6c6.json and https://artists.proofprofile.net/proofs/artist/be4d534d-f8e0-4405-afc3-3496040ec6c6.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59fbb73fa0d8a8feadd346398918ac004ee350873a24146ced50e19b04c149f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX762203367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc9fc94f96db34f8de90e17ad952390ee508e7e0778e6d7bc0fee26fb3e1ef2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRX762203368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a4642cd250bf281ca46d7c20e6f15abfc6ededb3e2fc092c566413f9a0e0d1. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/FRX762203369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f8f46e0086a6f5c58a38d6dbeb465479788d6d2dab30cd3f4065bd8c52d79b. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FRX762203370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f81265fb65c3b2302edb008a033346045a332504377234be216a012010f85c3. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FRX762203371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5b3123c5804a3461d1b3a9fac243fe2b199b365bf3f39986462789a58f93a5. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/TCAFW2124504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5412d5d941e06ec4f4d133e6a2fb64fdd985cbe349d6967ebd735626a3540d36. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/TCAFP2183462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a89c0a9d92177598084e4e781423a6397eaccfd88b70e59a0ef871c6ef2e57d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FRX762203372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7a2588dcf9aac66b5f97d9b359a296e66624c82a654b97eabf6c99e33e0538. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX762203373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5ee95d843605d322cbb609118aa60e29da3cca8728cdb8918c2a132e0fb1db. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRX762203374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3ee13670796488fdde807f9fc1e3a582358667da13029a2d431d0fda37a987. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USL4Q1839759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df11d05840c4e2df4f5608e3271f82770eee56a2a20b4d9193b9efbce9d4978. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USL4Q1839760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271b1444e7e3e009afc27560fb1a911c52fae9b18f7fdb284311f57ed930e472. 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/USL4Q1839761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f8d59a5abb144760588b77f26b4d73bb2652f2f681f760f5b176cfade655cc. 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/USL4Q1839765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb22540320e710ec3e381f32dd72e245670a0922cd96673e3e3013f9ea2f3f9. 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/DGA052410101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59fbb73fa0d8a8feadd346398918ac004ee350873a24146ced50e19b04c149f. 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/FRX762203367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5b3123c5804a3461d1b3a9fac243fe2b199b365bf3f39986462789a58f93a5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAFW2124504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5412d5d941e06ec4f4d133e6a2fb64fdd985cbe349d6967ebd735626a3540d36. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCAFP2183462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a402f9615cb9ceb041114714272d5b1cc5369aeccb2d7573259638c5d6ee56b. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TCAEG1999773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807cb99b89211a6f28ba4063725e5aa0cc602761362389d53692bcfcdf35a5c4. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/TCADF1723775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8198c4ef3bb18fd925e73d5e7e0c350b65cb504c6339d899ed7c290735b3988. 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/TCADF1723777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bfc5ea86a958e7d44c982471e80c78b9402b8525ac500d9d158893ec49c0f0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCADF1723776.