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 0x68f8e56ea2a6133f8dd46b4a5654bc4027df81ba3ae1dcca0eb3c8049c423b96. 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/2f56f797-417e-40ae-ba03-450383b22f68.json and https://artists.proofprofile.net/proofs/artist/2f56f797-417e-40ae-ba03-450383b22f68.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 0x1bc8c5dd03d2718fe959d0a0a646a6fe7297e26cae5ae523a801f2917232354b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBMA22326098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0f439712169ba196a0fd8ea5e021c81f464c09f51d455cde062120781e29a0. 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/GBMA22326099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3152aa78f65802516fc310dd302823552fde7adc107b7239a97dc27d0b604f97. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBMA22326100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc160803a9ac02b525ff8b7376fafa1a7747ce821433c61d646148ff5d0dab5e4. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/GBMA22326101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c6ce717f6cf78b29acbbd315d8011408fb9bff032611ff09c0409e9c5b307e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBMA22326097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4936b8f0d8cd0ac347ff8fb881abb5592a337340cc52789c36a73c9e39093702. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBLFP2469862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a07ca40e766f99930fb8cead3a7e03400e47aaf1b0909de8acb68c2565ed5d. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GBLFP2469863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9effb4efef23dcb1afee1e2fd4afa31ab94fc70a0616021c0fe7e831abae161d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBLFP2469865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba65a4c068ca22063f46226dc6e5a38108c2d1a141be7b007632cb37d23a37c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLFP2469864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44fc2e1e03686cde0d400ccdac2cc1a2a90f93f876e054b4167a09d99fde552. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/GBMA22399035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c577857f2c3fc3f9e87e248061cddc972f1c1cf856cc0fd09241bc11c7fce4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GX53U2482589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391afc9ceded568cc897ff6cdbec2c118e3bc01677f9376e9a12ee48f5fd66c9. 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/UKXN22524075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f4701091c9609053700dc9b64400fae25a8b888d4cac7134331a615d220e02. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ZAK172400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac125760cc668857e3af878eba84f78e3bc9e9eee8ddf2984b9581a6e8b6a68f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ZAK172400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99aba9cc0040ceecace740762f77bfacaca4ca9801aaf271fbbe26d8aaa952aa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZAK172400014.