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 0x0dcf9811d4a958a87aa6cabdbf19eecb81518c350f0e2b91aaf463d79aea6fda. 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/73c75841-6ece-4308-89b5-704ac3c9ce8b.json and https://artists.proofprofile.net/proofs/artist/73c75841-6ece-4308-89b5-704ac3c9ce8b.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 0xfeed2e0af32470c8824285e966b7896af97a30fc9e833b04a0e9ceb0e2c0555c. 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/QZWFL2416268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4804edb8ecff48d4ba7e23e54a69f80418833759f80bea7762e533e8b5553f. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZWFL2416270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a81063382a4a4540ffdcebabb019f4e8b346b458b1e5e487fb09b6e36a9aa7d. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZWFK2476179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ada440ec98c66b033abb07201db5596e4394560ce09512dd1afc3a860cc787. 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/QZWFK2476180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783cb7551727c5a6968784b3f98cd795d754f36c5c47fa649216709cd2fe305d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:40:58Z), 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/QZWFK2476181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdf423fa454fd6959ef3238f0ff1a15eb10c3cc8451231ce2e875421c1c38d2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:51:43Z), 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/QZWFK2476182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be5103bb1721451568e509e11339831c2339cd9333bac08ab8768fef1d90fb1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:06:52Z), 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/QZWFR2433141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c095c8e92516b66b0f6e6824876fea1b64d806474476fa343124de47d89f03. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZWFR2433142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b718fe89a6c0f139c719d9ca34f48c4de136a0168f0b70160ae89f736970750. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZVEM1831801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a687c3300fe85558b306aeb171a4cfb1d507829f80406138e61a042ba7bd01. 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/QZVEM1831802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d70c5e4899ebd11bdc2f663b1d27d35b01e67b193239c21a608727ee21b830. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZVEM1831803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d264cc321bdc3a6fb53a0b14c3797123de08d1d0bde37f5d414e3935d4555e. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZVEM1882643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d83438fe7598dd478b64c10a3001e2a583844e4e4e6cf144f6ad4119b684b6. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZVEM1882644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef03f56544e7260cb3347b58baa64807a415ac706fbcdf23192adc3bf6be5a2. 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/QZVEM1882645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cc077df4bf0dacacae1c53ef2756755159d89ad614a57815add66aced5514f. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/QZPEW2579097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55eb64ff8ef7f56fae2b5fbeccc4f770f7fd9caf4a88ce9bb9813b2c800214c0. 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/QZPEW2579098.