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 0x1469db7cd40e2deb2c2651d637394c574c42beb0aa9cd3b48590cc056bd54bdd. 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/7f802f0d-163f-4390-8927-699371503636.json and https://artists.proofprofile.net/proofs/artist/7f802f0d-163f-4390-8927-699371503636.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 0xc5c15b150d8db2bde8238f8ccd7a8bf31cdd2bae6f6aaa523d5a85ea74f948b2. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZK6H2218484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf121926194eefb0c9ebf417c49851b1ed1420a0ba7864ef9a112d6f4978c1f4. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:59:02Z), 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/QZNWR2240664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793a56ad120c2ad02f6ec263beec69c860afec0ce69a46f91209d9572afbde6f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:44:42Z), 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/QZTBA2300472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccf55b6cb91512d3567f6d6a40fe1e6ca8d3113de8f75474ab95b29d0b3e1ea. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTBF2359117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a7d6102ae9a7885c70e99de594957eef9be2d272ef543f110cd2c59080e6fa. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QZK6N2449084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c36b422e26f67254337933ca1c2ad5bfe9e74cc2eda43611e211ba14e5b0914. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZK6N2449086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6c3c8fde0088f6b7c7eb0c0dd1fe2d8ad672eb68fa58379a64155b732ef3e5. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZK6N2449089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8cb590c3fbb73d7b5db86a918eceae9348d50ed48bc07761d46612e2e2a7d0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:29:17Z), 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/QZTBE2415802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b30fdb01214278132ae16bbc6941092714cf8f591f1cf3c12bf3d9e1351326e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:47:37Z), 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/QZK6F2507543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6684eb42e189b593baffd993de53e1b12a284c483f892ad3bbcd8f1da00a6a7. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZK6F2507547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3a18d395d8a11c0403e6cec73155a6975ebeb7731fc123857768042a8d9a2e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZK6F2507550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480d6b3e1791c43df4568c6eb6fd8be7a466d7025b3f989aa4d8569bcd0d3ad0. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6K2589575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e20e1b6bdcb09581f2ec3a166e98eff65cc8cd9ea945d29c7db5b018df2df36. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:52:54Z), 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/QZK6F2507551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670d19f2d45d5e63221e5d92312a7741e6e1f629b182f91f7e006b53af9222c8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:20:42Z), 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/QZK6F2507552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc4662cf9a43a27a3bad989907c70fafbdfcf7368ef23f346d03b8890d080d2. 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/QT3F62562121.