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 0x9a32ad9e3faa2f8f77f063dbe311657ada25b210afa4a4271e69e3041f377aab. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a073c0d-b6d0-4268-ab03-cbd99ee942f8.json and https://artists.proofprofile.net/proofs/artist/9a073c0d-b6d0-4268-ab03-cbd99ee942f8.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 0xf14cdce0ad66f859be36736bad22bea96afff893ddc848956c100008ad3734df. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUB731572732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d7cd87d39ee708ab59cb725301dc893f2190b2778a4eeba9e3c4479708bcb5. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:56:42Z), 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/RUB731572738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7716a58bb4ce5f20047670a33d17a8d0a68c1b54d3ab60e6384ab48b0f7c93a5. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/RUB731572728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd49700583df450ac78b88a287f922e1347d218e6e5c943cd3148eee35827a9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/RUB731572740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cdd2cb1f2b64cb92a330b18efef6c3b474f1cc5e2b8dead98693952806d433. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:23:41Z), 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/RUB731572724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e22bb337da31dbafe2c1b8c4ce873642d9047a910de215b1bb9933e4c8f6bcd. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:05:49Z), 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/RUB731572744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3458df1aad1e71f9ac28431ea16325709deefbff9e66c63eab548a431e8a83b4. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:08:59Z), 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/RUB731572742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394084f23632bd2f2cadd1d1eb51a5355fc19c7f079e19134b9fa69e5c9c0809. 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/RUB731576168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2619a48431bf4f65b92bc15aa40f16ee0708f529e9c7bcde85bf4b9faff1f808. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/RUB731576174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac94afe297c961d466a5b5ba6ccac1ad1ad7a77834ef7bcbd1e58b7ff29f86c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUB731586837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334ad78b792330c7a3b63dd5dcbfc71dcf380736d9eefb72d9cbcd9f10f10d79. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/RUB731586847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdd66a51127b459326f065644cb600fc6ac264c1709eeff490874770ca73c07. 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/RUB731586845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca2b7736ebf5f21899241e761fa5c0e4095556e7d6640bab7c74c9e58ecc982. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:28:46Z), 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/RUB731586831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc918c1a2f8aa335b34cdaefbae143f951e29eb5b5ff8b6b19c9a636601769ebd. 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/RUB731598619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcbcf976a4cef9e27f12e7729de6d8160647ee5a4fa32b87fcf790de493cecc. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/RUB731599436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e4879972cd10c797412cbc43a47bd0e75787d699d8c0aa3e3ca156597712b6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:40:36Z), 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/RUB731599440.