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 0xeaf53c2dd8fcbaa7b77d3675a8b0f4189021547e62767ea00b8e227f2ec78075. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bac7ce0-d7e6-4baf-a4c5-3fecafcc0d36.json and https://artists.proofprofile.net/proofs/artist/9bac7ce0-d7e6-4baf-a4c5-3fecafcc0d36.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 0x4dcaf45808459e765c30f67350b90bae36fe602c687598123d9a41df239f4944. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZV5V2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33e3d78ab5d300ace401d940fbcb14b740c6073245f8e639f010697d36c5938. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZV5V2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47aec84a352beb26777078287f5f07fb87d8cc7628efb00f3af74d8339bf851b. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZV5V2300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4206178ed5e528cf18013f5099956b24fe510b08d43eddeb5648a9f7484e320. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZV5V2300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fd220ce46fdcd6c0176ad3ab2cd480850c8b7f4ff08268373984700f99b102. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZV5V2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ccd8063d3d1a01e3b13c6d9c9905403c7f5b5140dfb5d7aa86376272b35d33. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZV5V2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b939856476a1f18b0cd3dace39b6d543e7935e50f63689b0304ce50870510e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZV5V2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7911fc080d320e24ad5169815d739d1b14eeac35959cb0e58e7cb885e5a8178. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZV5V2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250dad5b6476cb15db55e1e343e2f9db9a370e7ab3943c62d598c9124b1cf1da. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZV5V2300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fd220ce46fdcd6c0176ad3ab2cd480850c8b7f4ff08268373984700f99b102. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZV5V2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c507524d7b584332a53e4a26d267edb470e5194889608f89206f9030ae3bbbf. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZV5V2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8cfe9c788c84ef614e2515febb44e2edfaa5b7a82ad30a9a7c967b47d48f3d. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZV5V2300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1498f2e2b1b609b0a3caa2584264769886f83b1c259906a8cc8f4fddc827300. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZV5V2300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc55a0a9da927bc5f37adbdc60284c73ff5dabe225e10c742cf32d956016d4bf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:01:43Z), 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/QZV5V2300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f195ae6cc6b3d2058a2bb5009776a5b75a3ac7140e7e159fba7c6862c5c409e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZV5V2300066.