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 0x9f405f39d842b629e668a86e8561913e6844f9946ca0bcc19024e778a6d8eeff. 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/890a5ad4-6575-48bf-9975-21cfda733c0e.json and https://artists.proofprofile.net/proofs/artist/890a5ad4-6575-48bf-9975-21cfda733c0e.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 0xdf24e65070f3c1d34600419880fb8bcb9e873aab1f9f40af8eb60c4543fd5d35. 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/QM7G91613139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7fac2ea016976fadcb6f4de157a3e5b8fadcba7d7f9ac130f8e8eb36900c8b. 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/QM7G91613147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5e7b6ccccc3da19efb8be8121b6fb3747e73a90779d5a622366cb0de7542d6. 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/USCGJ1464706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d9975b7389e8225be2aab0413988d91ab53a1e1b2e16d8a6d3e9b1722d5d85. 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/QM7G91610390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aeb6c34f5eaa3e944ab4dcb7f6a5f3ad45425fc12bc841e222f61e20c58b280. 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/QM7G91610378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7432cdf7e7dafdfaace3f64b33ce5ab3111546a83017cfd7b91d9cdbc01881. 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/QM7G91610379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7362e0b98442eaa811208a24eff1c7f3be57e0fde9062669a8e5c1e06de98b47. 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/QM7G91610381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6278b7a8987e1653e6d44f28ca60f27c6dc1bd755fcb14d034bd35a06f222fb1. 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/QM7G91610382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c24ec7b142d5c3a840d9f605d2ff13745762d965fa2735772e641ab157eab0. 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/QM7G91610383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bd3a274b98194059d8f926061571ff6a7be87e1c9890752e1e6034155bcf78. 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/QM7G91610386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cc3a7877ef933dcbb9c6c32067fb4c45f824ee0c2cebab79265a571b837847. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QM7G91610388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557d95b78d6ad25be71ae840b6fe918f582cd0f81fc2a7c41b2cb5f312dd314b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM7G91610365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ef2d8fc8c93f6a1642f8137892e48fa554fc1502ae760ee0876295a003bdbe. 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/QM7G91610376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893b60b34142851189bb169ad068e87c5f695effe93cba414eb1535fec8bdbad. 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/QM7G91610298.