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 0xc099b1e9d6e56013bb17faef47ca74f11a4c7a9f4c56b642c9c582e4be8b65f5. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7dab4fd-8521-4bc7-8718-4e37a4ea961a.json and https://artists.proofprofile.net/proofs/artist/a7dab4fd-8521-4bc7-8718-4e37a4ea961a.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 0xb17305c5fdc98ff70be49a8c7cba7ca10007fe2b0e00d6805584af5d11c8a707. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZWFR2420496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b7568d68743932d74af0b2189e9854bfb2a255e8e0d561f9ef6d3dabb2261e. 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/QZZ762443697.
Snowfall Serenade: A Christmas Celebration
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa556d244e3e0c10a291752ebcac551bfa3b5ab8702ceba560ec9cfdae027f4fe. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7T2430471.
Untamed Austinight: Afrolectric Remix (Mumo Beats Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ea4d32a8ce547242f5e6cff2223bcc14028d747592fd9bfef8f47a3a03b750. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZES92553477.
All Butt, Still Fine (Erning Bathala Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3917b195f8afc514775b255504fc9354e7c608cb4cd791d25f1f41aad9c59c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZMEM2518819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0d820d6fbcd9fef304ef5cfa3e09571af01427438d28e735e1367462aeecef. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZMEN2518738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6aa3b3d453fe59f86bafe87e7bf95d7922fd81318d049ffcf0b7cd26c6fafb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNWU2585852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedd15d0563fe96c47748849845c977f82cd6a5156efd0cce345c81108aa164e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTB32503091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b4f93054f27fc468e28bac4740bcf483c19fda811d949b603532c2bcd1d8de. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZTBA2516282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865d5cd6c8e4bdc9c40d76a7d8e16b1efdfb384b00600cad7c89b16c3b27a0d6. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZWFX2549098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f785d58ca699ec7d87351658591bdb7943d51ae78cabb67679d966e48663ce5. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZWFU2583759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc342638275bd9be6dac763ad7e1c0a617b08488df71cf9e1a68320a12ea89dce. 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/QZZ7M2477447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b88a38c77c85cc7db70f9d369ecb02c219c9f0e7eb4626f27c522dd17ce9d1. 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/QZZ7U2501872.