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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fac288aea67d79c56051c0ac894c467d96e32d28fa53d5a17b768ccba4ded3. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0234b044-a90f-4c20-acb9-5ede5e07666e.json and https://artists.proofprofile.net/proofs/artist/0234b044-a90f-4c20-acb9-5ede5e07666e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a75b5c695f0cdaca4f4746a149399727d6e72891a8b4077ea16dc4c7f731356. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZEQU2059594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5673ebc3b2c3608d9ec486e5f5aa53fb4698d483a9242c3199123bd61c6e67b1. 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/QZEQU2059601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d313860b20f7d7d222fc17c3dcf1156475a45aece784f7b50707e00ab5a0d8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZEQU2059603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41543c0be1c76c6bc08025fb6c9eb3920e5b2470d9bd002f05063973ee3403a7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZEQU2059577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b241f73a3fbdd1f6da94619c9356a40474072acfcca658c1b9b7b81df0cf4f3. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZEQU2059578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139a1b9a12f74a0de8f2772e40301b7e745b2a21c1427bb9c62f858f080cb65c. 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/QZEQU2059579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81a0cd248c31ca00b80bf6bbf0e366611d9dca160eb3be95a85b158ae5be3e8. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZEQU2059580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010881cc3b6376a93a116b3acb801cfa3d62eba4406ff809ccc68e4ca79ebebc. 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/QZEQU2059581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38831c464f7f583dee41b449a78c0ba7aa6e01bac55a58348a0fbf304629e263. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZEQU2059582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984fd34be9e995811fd39419aa90301934bae1397ee7ce104936f5a3ddf98e1c. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZEQU2059583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d6030a719576ee848c50014fac8b9a3c3fb71f7c534c25de18ab962497a2fd. 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/QZEQU2059584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21be56e58d0a3557345980a6f98f9d71d252e89d1a3c111f1193b9999be418e5. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZEQU2059585.
Esta Noite Eu Queria Que o Mundo Acabasse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64650330dc35df498ab7bee379d6ab42743279cc41162134cd05193bd5d0e5c5. 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/QZEQU2059586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c185f1b1a2ade6f1117c25ebfea32c11ac05b056c2ee5e654607396fde7cd1a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZEQU2059587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6b2c170765f1c3abf5e718f59a9dda8379be5c9dd4cc8eb00e545471e27c39. 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/QZEQU2059588.