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 0x289574c41329684151bb8cb8ccb4cc2ba87910cc99956f4d74f9bc4779eeb135. 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/d53006df-c3b8-436b-abe9-16f9a2ff3551.json and https://artists.proofprofile.net/proofs/artist/d53006df-c3b8-436b-abe9-16f9a2ff3551.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 0x4c8544f7bddb3ba0dcea9792d4b946a2b3ff94af65075a8f655c228ba26968ca. 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/QZTB92262432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5d3cf87751e2c9c056097d44cefe2e8b77730cceb0033867a38e267dcaf49e. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZTB92262433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7471306471453919ab0b1aad14f6ade584a7108d4e255dc0299fc51c8f232cd2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB92262434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dd4b93ed2225aff2ee9af970e336fecb4e38d3c5c966fe5e9d160025a16b76. 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/QZTB92262437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac1661f9bbd1de358b2cebb7daf64ddd0cb2648bbc3224436708526634bdbe6. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZTB92262440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf992ffd77efa4c8bd32ef79c1e76910d7f814d16022e278112e806816e7deeac. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZTB92262442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413cf379ec89429b9118ad73baacb362ca6ad5662d0b156cd49dcbcfb3f33b61. 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/QZTB92262443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2155e65a92c615c00494f1163e55acc8159c0705baa646b5f487946bd9754d2b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZTB92245955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848fadba215eddf71d416e0a711fe2f0c523a53a417a3ec7fe49c80689050874. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZTB92245956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf343e12434ab6fba75bad75469b36225b8737d6bd85be0cd1483cff78d5792. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZTB92245957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bf86fd47f8be52e6ee6948c3d7c8ef88f76eaa6fb761051512ad67d8d6cb76. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB92245962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e0458deddf8c50655e6f3a49fb60d026740f16c960a3f465ce0b904a495205. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZTB92245963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af6f99b4953396d551a6907d3953f3f4af5c98c3c5ee0cf63a56586f674dd36. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZTB92245964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4eda1f4496d2a84dde4e3f4bc812afdeaf712bcf0e71f3cb695bbd4d5b7931. 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/QZTB92245965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abedc7dd2bf6e1ac03ae1abcee124e49d0f83c5b9ff06b0cd4417cd65ec5dce. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZTB92245966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5aa73fa74a41c02bad76b686fb6026613b0b254262877d74775e140e0bd184. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QZWFN2325657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdadc2cc92be8346a42e2584f53fd5816110b112fa21e5c9cc045416e2decce. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZWFN2325659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3e91e83d854b7a91391368edf98a2d890471dda2264b3a8ee5ca86df58bc82. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZWFN2325661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b7224943dc9c194e3b72871c87ec086c32c44ad552e7d05b78b24a6a96d4d4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFN2325662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda256ed8f25941e9d9ce35033314a0ab4d112195abf25b0f0ebb34c8494639a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZWFN2325663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cd647cd5208160b34dccfb521381c7468bb348794e0b5b576b36b0455cf749. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFN2325664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6407d18e452fa94542acf3e295187a03efd6c7262336a3a7306bd0a35989ed. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZWFN2325665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d2c94da5cd0ae1be7daccd6ae94f4951c52e5773e787c7dcca5f3aa0d1b244. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZWFN2325666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984e483a3e9f9100a0aceea5b157dfaf38fc7a2908081f779a09b3bec84800d7. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USANG2488402.