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 0x28fa18a7576d54fd127f16ed3f36410e75f6fa1a1f4d914bb3b11923ee1b43fd. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f8f74b8-273a-4ff9-bf42-f26588d6a668.json and https://artists.proofprofile.net/proofs/artist/7f8f74b8-273a-4ff9-bf42-f26588d6a668.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 0xdd93a5716065f4021bce80a95d624e291b1b517d23f6c11ae4baef9d493c766a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USX9P1046155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b2e35247891456e43720b778b894bb9e498949939478ba38ee54e9e560ebd1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:31:55Z), 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/USX9P1046157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5edb02b0a3929e6153a349d005187ac30528f47eb89c61619c37202c80c9cf. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:48:44Z), 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/USX9P1046158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29f811c81d9bbda44143e6085c7c545064af8aeb12a447a48127d539c723e43. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:38:05Z), 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/ES8591300703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d0fd0f942ea6293f2b8a4a85e74b3d60834a66e89f532fee824116de03df2d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ES8591300706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa15fa06ec3079611aee18df84f91bb17f0b0c5bebc8907bceff2a72dc93a0f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USHM21329900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa7f36a2e2916ec365291f3954a2f25a9a9265bcb40ad0d959f08341d6f35b1. 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/USHM21329906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f13e8851430961a264f37e4cd4c00a9615f5e355a32a8dd689b3bc32d0777a4. 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/ES8591500848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5767106b64bb3ee3f0329dc783e331d2a0afbbe566f9b22f94e98cbfe4654db3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USL4Q2378651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea29ea79eb9168dd287c9234b0e2911e3aa473639892e5318a40fc2b81946be7. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/USL4Q2378652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbfb0a0a348918b7a33b2aa7e5683cbc0e061916877580d0b25de457054023d. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:23:09Z), 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/USHM92531332.