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 0xb4b62b795b79111555ef2de5ac35571b4522b2e97261ae9ca80d0ac3f99c4f25. 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/8a400041-c4a5-4e5b-b51e-5452e973f2b3.json and https://artists.proofprofile.net/proofs/artist/8a400041-c4a5-4e5b-b51e-5452e973f2b3.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 0xba56fd33bd05ef51ebeee831dcb2214a3f15524c7b0fdc081284fe2ccec734d2. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHN32297693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b101b06b57b586246493c1e0504d51bad841227c82f24611aa4c28fee32f86. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZMEP2363697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336957d4bbe98446ae8ac21d0aafc194d2b1717c908a41a79bff1925c947448e. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:45:56Z), 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/QZMEP2363698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d773df2bfe59e70d25739cdd8790767d9a8bb1e004cb70fdc57ee065c78dea7. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZWFQ2334552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1abd2ea8b6bc959f9b3a3c95b33ff8b5bf28493b1955a7b859b486b03b50f0. 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/QZES72476311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb617acb8bb51c28a390e855dd9ea7e1e919707dedb443e6ca9cdf4a5857e3d3. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZK6M2416363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c8d974540f71ef0ecc662f4b24b60ca81fbfe8fdcf13bf898488b2146f2218. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QT3EZ2425342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb81725b6f95855a12f548be852ccc7398fd4334e8c274d79df2de109856c6f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ7L2515517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905de3a819a0d94802092e5c9e4564f51637c1d746141672afc9443f5632dfd2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:53:25Z), 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/QZZ7L2515518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b617b41e3f899ace3319932f1bc2d0cc1c20e8ee8b2380f53f85e23673ee929. 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/QZZ7L2515519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1033456cc4347b616c82ec2b5baf726d3895674069f9c91fbdc9d5a74cd048. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:29:21Z), 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/QZZ7L2515520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fed50055a4cfbe7c44b7941d971507c0d63438006604bafdca90528d361c3d. 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/QZZ7L2515521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590074ab467fac17efb940d7fd4cf02ef7385d9cd4be15c2d5f12e9ca495daa1. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ7L2515522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0b8cab98f8c160bb5e4767a0c331fd8db743df087df0df178386519f25495e. 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/QZZ7L2515524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc13822a360f0ae46217e93cff9ecb11673a6556cf1e97fd020e5f87ed65c56. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7L2515525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef671226009307bda749ebf3d39aed9f0c877ef16eb42c9ee3bfaff6e9cbd88. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:42:24Z), 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/QZZ7L2515526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1febfa5580b72b9bdb5bf3a872ffc508b13f862aa7cef40d80c072e2e356d388. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ7L2515527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933b67ed4d642f5274e4238b3fb5242472b9530a73d21575aa04897d0234c403. 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/QZTB22559092.