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 0x1b46259e074361708866aa32f7e70a7ce74b4be2fa0b49a9f412c0e9107ec010. 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/6836868d-a43d-4546-9428-bd44c30f7d34.json and https://artists.proofprofile.net/proofs/artist/6836868d-a43d-4546-9428-bd44c30f7d34.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 0x775342e3610dceb8c9ed7a5878562a1008c8f72ae52d79eb0e5095ee8faddc11. 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/QZ5AB1922801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef18691d7ec80f1a9b0f3d31f6e5507daaa5036e097b3bcf6dfad62fce3cea5. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZ5AB1922802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84a4b0de9c66d246c8672235ae7f9a22cb7059db6b37270611ebabd7cbd27df. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ5AB1922805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6275caa9d7bb416345c57ffc8affaf572e7b3e33ff0bc91acd322c888156b6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:43:07Z), 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/QZ5AB1922807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a305367fa2ad087fad567ce811495a106c818eb62a2ba80609ed75c7ef0cc05. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ5AB1922809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb47ee49d0119025f7c49f6b311e0fc5ce5e2742d16ea1c943b23d5ec1c8f5e. 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/BXYAC2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0351be6d5158af4c3a686d9541d55b6515878305b83841d6c6da3a2c36966741. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/BXYAC2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0528743ec840ee42ef99ebd2760cffd7e8a6ec1a54e7ede229244faa3cf0aa17. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZGLS2119449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9fca849dcdaa9a31d26089f68f281ea33695caca39030f5a90ddad3926481b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/BXYAC2200001.