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 0x4c61a9629160d268bf64e42d3340a812f9387734b4b7f1d8328925324ceb6b37. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b4c0f71-6503-4843-959f-25b3b9f2d3ea.json and https://artists.proofprofile.net/proofs/artist/9b4c0f71-6503-4843-959f-25b3b9f2d3ea.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 0xedc8a3469684605a1a22e1b6361a0c6ad43b5d9cd326193055615cf9df405719. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BXF2I1800074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe13972058945da9a35d4aa09fe8c9edc22ee9c67151dead9a25032ab479bb24. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/BXEPJ2000220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23817afe5f40b63a69ea4a80cf8a3e42d215cfb8598ca035d6d4f7b20309e6b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BXEPJ1900141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa962be7253799145a817b920e4cc4d68433eb4412df6dedcda046fe48c5ab5d7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BXEPJ1900142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb6e5f87b48faaff24e7aebf375134c5fd20c0d3ff5135f725772833d65bf44. 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/BXEPJ1900143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12c51478166290ceb207df16dc6fb8f8f399ed036fd562265e5f2ad9656f283. 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/BXEPJ2000172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77e562bba6c90b4276efe045adddee0024928df89ecf69118939b56f7753e6e. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/BXEPJ1900144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f266532a396d62769885d267a05d729d69dad5390c4daac3bd553edead4f6cb. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/BXEPJ1900146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d808f9a2d5d03f7c4a544c3376e2b7c2f36323f66caadfa4be7b1e9ea5a7d4f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BXEPJ1900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db8e95d8f74ec30b1e547c49b34eb02254cb4f7d3a12490a6e415aa27fdb7c1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXEPJ1900149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5b6a3f91026ef36f8da6bf58bc24e459bdc72cbd6d49513572b9fa4a0c49c0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXEPJ1900150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9f801078c7e595b11aff9eaf91d46365b2a56952ec20d67fbd742aa3149fb1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXEPJ1900154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549194f97ef69fc377ec44818964f5824bbffefc51834ea4f42afc155cb86693. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BXEPJ1900158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd14636c89e80c525fdc8633a401433c5bde423725bad52b53f5b4af36f09f0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXEPJ1900160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41df6ee8c76e4594f57a9cb51a4060ae3f48b3665081216cea001088dc34218. 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/QZTPX2112335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc9dcd14ab55e0540ff90e7950e69b72479b368017983147041742f80c61ad1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BXEPJ1800084.
Free - Apolo Oliver, Anndhy Becker Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71f88d70792884794d68d856b0b70af603e9413450d67056fcb79cbff91ecf1. 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/BXEPJ1900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad69d080e65d80a3902afd79234a3dd918c3ad52235da1b772c963b937cb01a6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXF2I2000030.
Party Beat - Marcio Peron & Diogo Ferrer Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc599c18bb764306626eff3a9aa3a02357062736ec6574a6baf3a7557db3289b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BXF2I2000032.