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 0x2ca2774bbf820e74e477540405d5dfd94edfd2d56f087882592f1124d142156c. 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/b97d80e3-dfb9-411e-a487-0ad4c94379e7.json and https://artists.proofprofile.net/proofs/artist/b97d80e3-dfb9-411e-a487-0ad4c94379e7.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 0x501483c3b2ee1152ba6afdbc131238ade6a3c422a22147e5729eb8641cadabe4. 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/USANG2293033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96f0f0eca8a2f08f30985bbf26fb2555bf55b7fec83469bda09492cf8c7ce2e. 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/UKZGC2304486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e244b2fd73af633e0aacf254450c35936cf839ae06605f8c44ab4212bec2ec. 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/UKZGC2305435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd056fa960c3ec8935545ae647dad8043df9d3c2bdd04ca6cf36309ddb5917373. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/UKZGC2305436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf685cf576ebf5d306830bb5ade3df5ab6ee25d5604e1763790aa6631d7191d32. 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/QM3DF2281436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fba48c7a40c86a58fe10bb5b9e743313ad153cf57161b95e104141ec5d1118. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM3DF2269858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa836488ebfb38416dbec1dbf47e91e32f4857b701a66af1bb0ff41b79380c59c. 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/DEH742426137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02bb87f149843e17b1167edd4ec306b5154fd88626726d5949e9565d4748037. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3DF2501649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b311c16243b95a259bc0b97b0bc0063ac5b41a63eac43b0debb16b572521e4c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:51:50Z), 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/UKZGC2500886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1612f989c2f10b20f736c9a7bf19be61146bc7cca0dcd38bb3340a22d127a73. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:52:29Z), 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/UKZGC2500878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52075c11b2d64f04018649304c06ac54be64968502105026913866795e81402e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/FR2X42557912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909127fcdaf21c920233328de470532ee5c6193caef47d393c4e1544993f5891. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/US3DF2572320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2daa95eb7145a36563bd62b659852a1e76385c73778e7637af13e825911505. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/US3DF2584960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab05b840969426bd5c426ed6f11ea227daeb5c9bb52f1a9651ab1de1944a7362. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USANG2520497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9adee84f7353b03241879b97032a0f458803c74d04c5ddb9ad6c0864420545. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2286549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650a5179d0080e801bc20f8229e3fb9f6ff1466fd89a931bb03d978f192d6d2e. 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/DGA0R2489178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc12e8ed3d6fe5326830d21a38063e646a350044a2eefd1a168f32a8622d7fb. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/DGA0S2444554.
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