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 0xa048bc42d5e1e7f6b28ee749f149f90cf608386df0e5f643dab6f9f73d0f1efd. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc175df7-3849-4e94-94dd-24f24774f271.json and https://artists.proofprofile.net/proofs/artist/dc175df7-3849-4e94-94dd-24f24774f271.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 0x3175fee1e9a15a8e7b5cb1b8a5b76b42ee92737c4c861e7f7bce0b2fc7cb3397. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GX3HH2573414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad26f830706d3f157e61c06d7e67c6bd5210b2dd8fc6f577f4aee54e3dba3a82. 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/GX3HH2594292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a0adf0c8993d4f7ee60a109f7c0310fef61081445462bdd374299275a0f2a3. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GX3HH2593102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b92bdc5cb5fa51b3002ef3c3558e6a7964ba33d3a1fdd8c717c6f714d6d7d3. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GX3HH2534810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b7fa3337b654b5e520713bf3d546d99a21f579f6ee1da839a02b3aadef4b2f. 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/GX3HH2521741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb62588bb415ab5f0b6ef2872533e91748b0ecb7a90dd9d8ba86642887555750. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GX3HH2588650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47503e389ef387901fbc50958c40e84550632ff5d4977f031bc7a6e11519da2c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GX3HH2528040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaec82b7c94eac5872f778fafbd4c22d873eefae3129d0b0232cfd1b90033f73. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GX3HH2595879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d909b04362a597d431bf678562bc81694860e8941b4cfcb3a17130624714f1. 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/GX3HH2508349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4d47081bdc0ae07b0853f24eab5da010354eb1b6ab7ea7cb4f153d1a2f9d79. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GX3HH2518922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7ef39ab7acc00d5009f1d0c1df42dd8534c0823f58cbcb23835065063367e1. 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/GX3HH2556311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6b46eb13459665006051b836d25a8746cdab10aef532ea419941576f5bee03. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/GX3HH2514664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfd5f096cd321e97b63b77daea4c808747e4695317d1c88cb89861b83cc1ba6. 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/GX3HH2530394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f0595077a686582bf79ed71cd32f3115c1bb1574a11222d33a1f877f032a02. 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/GX3HH2585883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640e9239e09903c8b392b3b4e58e299f13c90fed111832238b160ed4116222ab. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/GX3HH2549337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac79ebbc04e8a79dc34b63122f9f40338d68057c0f793e6c2e58dff2fc122d9. 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/GX3HH2537802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998242bfc40d3ed6a9b5ffbb1161c16b386a154b3edde5b8782e1635264a7116. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/GX5MX2561788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe3892161043f437db5f11386e2f58b225909ba7d75b11cb69850341e8d8749. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/GX5MX2597167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb79794a1dbb5121d57a7be0824891385cbf362d99bc50f400f11e9b04ddc444. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/GX5MX2534015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cfbe1d77425072f87e5d423034b5c53b5b4b7667381de81421fae2f0919b21. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX5MX2506503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadcf71130b7b2fe06c6b5190c3d1f6fdb250d381553f78b351624ac244d9c9d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GX5MX2549605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c0363e360b0706efd3781849c73b1f7c6a9804b539f69770c5cf5267a20af2. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/GX5MX2536155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd14bca1a7db1beb3d5b41ea577c5af2f5e5b3c5f49815852135d4cae6057257. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GX5MX2588376.