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 0xff5b52128d1527cfd3d53687f93470e4506dc8cb8bb0639d522bf86da5fcb127. 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/1319df73-2304-4c08-a4a3-391ab5cc023b.json and https://artists.proofprofile.net/proofs/artist/1319df73-2304-4c08-a4a3-391ab5cc023b.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 0x219beaeb2236c26c6b5ed6e6b965ec3818160f41869e808debaa3d293181c7b6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEN2135498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a30e27e760bd52ddb85d5223f8f00757cabf39c20201b7fc0486d28a00f3d1. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZFYX2227757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0953d9316a9ef4f1adaaa8bb28b9252e89609f02b50cd5f47d771f8d038e59de. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZNWZ2187829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41c5d4242180fc232a46acccfe17f92930eca812237a6bc4394ebf133b903e5. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZK6P2282992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a1eae487dec49fdc75870989e59689e15fcb8b71b41a94bd309ee43ce29991. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZK6H2426265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2372b72c8279567d92cf09394537c8826d29e0625c1dcbb8a0a71967a7e86d. 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/QZTAS2481293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836ac7bbe9f9a37e5dd4110cbe4cfd45c488e001b29dcad3fb3279a5560d2112. 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/QZWFP2497535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836ac7bbe9f9a37e5dd4110cbe4cfd45c488e001b29dcad3fb3279a5560d2112. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZWFP2497535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024b61d5e72e7a48305922fc26307b9c63d19018ece859c4e4549b1a2dd35afc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFW2497720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f602a185fa226fa1ed4a29b4814fb3ee469dd0c2037a5e99a50939402f7cca. 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/QZWFW2497721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d43de188cdce28dbbac20462c97bf47931a105fa21f189f847fb24721f3f96d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:47:42Z), 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/QZWFW2497722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494abc9634178b7267645c5e0972a16b85b386ed8ad047cdc43aaace773308dd. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZWFW2497723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13cb3c43ca2ad8497d388d56646dacd0e029a6ab8ee16938d3dbbfb27cf2b98. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFW2497724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112822cc806ff6ecf3aaea2ac9cb923990e8e9346efc1d09ac37eb3239d51b83. 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/QZWFW2497725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8747764ca2f570bd3532f11eb7b4b5a2531d0bf8d881f498659afe2631fb38a9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFW2497727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8556f1a224ae3fd962de7c548890a4fbce2efcc04ffd041fc74d0b74b0b7699. 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/QZWFW2497728.