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 0x0d279e5d1a78eedb5decd2c123e6896aa52df740eda20de2b885a095f35cbcb3. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ee7ed48-781c-4ccc-842e-7f170fb3d666.json and https://artists.proofprofile.net/proofs/artist/2ee7ed48-781c-4ccc-842e-7f170fb3d666.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 0x22004a69c2319bc1d15763bfd39b613bfee2a85b17bad4c06d808e70cee30e70. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/GBLLT2330626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d262c0124bacf51312d3b37790288f6d36afad2fcafcab9cd6990563553b65. 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/GBLLT2330627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d1e60651f5b75c6ea582fa0c7277f820fa5a10a2897ccb81dd3f2d8bf91fbf. 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/GBLLT2330628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90171513839ef1388d38e0d0e8ed7f0fa038ce493b8f321f1b5667638f661206. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBLLT2330629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9512637096884a0199357dce53e99d838e17f807941ed1c1aa01910d1fce4194. 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/GBLLT2330630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec61ea3ded2eb16aa33388fb8adcf7851bb4b311a2253ee2a90424fc4706181. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBLLT2330631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa087aa6ea51c6a2d5e02d4def4022e6dfd062ea395e14c3692b453505d6fd6. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GBLLT2330632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48ddcf2d5a1c4c2468d4eac4f6d1534bbe8d4cd9977b6af6e4d99c37bf38804. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/GBLLT2330633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5761ce42c64730e2fc9eaadbca3dc4e5b72ee70902c28462c3d3484703cad38. 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/GBLLT2330634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45dae884ee174e48ad44382bad968a548abdc543fd8560b929ede59e7f2d8b71. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/GBLLT2330635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabd2aea7c8c05f9eb083718367773ed0f0a884bf94d52e083dffa0110c8e49c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GBLLT2330636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7feded739fee05050afd1f0c830440a43d243260519c49ca394211a1749466b9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBLLT2330639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0289a566e1f5791d25eca6fe73db963edfbafc5cdc856a39153c0d1de859be63. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBLLT2330642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb012dc81a0ef9939825b5453785dcd81788530bb6876b9f2a955a4d4331244b5. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GBLLT2330643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79567e10dc7ce5632b82542b71447d186b97f49807103e79938b54ac69327ca. 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/SEYOK2228210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eddbb5ef473268396bb236abf880f5cff75cfd084d0ab899328d2b04a9968d5. 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/SEYOK2228201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a67175d1708085d7d2ae8b3c5def69ea3abb0fcd4243d425d1e6654a9477258. 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/SEYOK2228202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6cc505db194349b5b113a36e34027c976fc3f1fc17092d7021ebd0f96b70ad. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/SEYOK2228203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc355a57dac50df1b2cda5cfe533a8435ccd5c58c26e2b6045e2788e635ae33a3. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/SEYOK2228204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1ec5ae272c78e3536a3ce382b6423674ceb8b211b60f2befade9d52623956c. 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/SEYOK2228205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e58dd490682d6d5b91cc5961a5144deb10986b0c1390c18947da52c7bc099da. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/SEYOK2228206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a44d8775946c96333006ddccbfb17b5bc240a6512c60b762529fbb6e3dd4722. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SEYOK2228207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487f4a2f5f2d5d27dac3895086fa7151a9b8e796cd189a100b1802364e507b0c. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/SEYOK2228208.