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 0xdf486c30a164495bfb96d9210a0a5ed6090a1052384d1ba209fff0935e1e6c39. 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/77094433-466b-49f6-94b1-7dd9fef1fe45.json and https://artists.proofprofile.net/proofs/artist/77094433-466b-49f6-94b1-7dd9fef1fe45.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Better World / The Times They Are a Changin'
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 0xedf5d3185d9c7540380b8a2da5310d1241c3506f8334fc0d4cf97bd7096152ad. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USYAH1700155.
A Better World / The Times They Are A Changin'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92438e0e586fe4a2900a04274fa60da2ddcf2b6df90eb98c7c4cc21e40844a45. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ISB112203803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92438e0e586fe4a2900a04274fa60da2ddcf2b6df90eb98c7c4cc21e40844a45. 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/ISB112203803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbba5e7176a442b7a296e3cff016b1a8efdae5e3ecddb9493e416b5e0828415e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:08:28Z), 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/ISB112203804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10a6da16fa4d69f6ee0487b07280664b2a3d2011dc9d1555ccf99d736c52efa. 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/QM4TW2508850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf979099e2829b72e79849d251080f156277101f23a66911711c87d6237ec00. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM4TW2508846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf979099e2829b72e79849d251080f156277101f23a66911711c87d6237ec00. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:20:02Z), 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/QM4TW2508846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e33eace386f64ef833d7722e80525092322757bf4725d38c88250cba0eb034. 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/QM4TW2508847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10a6da16fa4d69f6ee0487b07280664b2a3d2011dc9d1555ccf99d736c52efa. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM4TW2508850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcdcb97d48a5306d5f42dda2bee3fe49cdadb684789b898381639fa5fb35c2b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QM4TW2508851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ec3ffa0342fa879e7c233f195b607a447ee4ffe66e3a9198dace7f0a545f98. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:45:27Z), 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/QM4TW2508852.
They Might've Even Loved Me (Re:Imagination)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd34cff0719ad1015ed7436ea42efb6934414f6d75bd4a4fe28ba70ddcebecff. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEC1989871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd506f60f128144e8ef039cebaa8427abddd02f218f91122fc93f7a7c4985c1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USYAH1700223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b24f736cd654a46c706eef63223cb9c49b1b07cd68fe5a786a2c77dc141d3b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ47A1800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e296b8c5640ec7ae1523124ee51aae8d2d8d6edf6f997ee002e77c861a1cbe9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USYAH1700053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858cfcd8eb647150000cfefe4694f15cbe8f392028953a544cfbf0db8de941e1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCACX1710617.