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 0xb6fb953112aeb13425f09cc4dae6eb7c577a9bf37474dd37dc26793fccfcb880. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48cd27e5-277c-4b3f-baed-1f9c682eae56.json and https://artists.proofprofile.net/proofs/artist/48cd27e5-277c-4b3f-baed-1f9c682eae56.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 0x419ed599fd2f47cb04e4a41b8042a2529ca817a2777e203006ddb566e8a22702. 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/PLC062381468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068f007c9c6b44e2fa09d8a132f35538bac3d87e000c0706fcdcd46b8b1a22a0. 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/PLC062120094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fc6cb4134a3b6e85d5382af543bf891c513b34612554e4f3e45148faca519e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLC062120098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54fbedbe86a13cabda78c91df25d17ad142e17067b77ba2181c21e4c4b34e6f. 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/PLC062120099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068f007c9c6b44e2fa09d8a132f35538bac3d87e000c0706fcdcd46b8b1a22a0. 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/PLC062120094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fc6cb4134a3b6e85d5382af543bf891c513b34612554e4f3e45148faca519e. 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/PLC062120098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54fbedbe86a13cabda78c91df25d17ad142e17067b77ba2181c21e4c4b34e6f. 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/PLC062120099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac27910cbb09d40ea7031980fe59a95e08d88da211c07baef0bf96640e93d8b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLC062114063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb70e9da586904e556be2d59f65697e1a36274e851e43088f36ff7e8bd38b20e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLC062010719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ba3ea2f4c8666074abe613b08e14f605cd3de258eade513a31b7d80bedd0c0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PLC062009512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6459154d3135a3f35f2bb347dcca372a2359b8974c99c918db1ecb2ec05cb4. 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/PLC061908383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718f7f193e3bff4e77e8ff7b91e31c84069bccb89d6cca7b3393366d43d2d210. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC061807373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718f7f193e3bff4e77e8ff7b91e31c84069bccb89d6cca7b3393366d43d2d210. 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/PLC061807373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac27910cbb09d40ea7031980fe59a95e08d88da211c07baef0bf96640e93d8b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/PLC062114063.