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 0x181848f8c1cd2e5d029e0fea269d9d805ee425c71e95f3b176fb19e4f60162a1. Chain 2 (Bitcoin): anchored in block 954063 (2026-06-17T07:49:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4841c6ad-499f-406b-8da7-a79358490a92.json and https://artists.proofprofile.net/proofs/artist/4841c6ad-499f-406b-8da7-a79358490a92.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jazz Café (The Best Jazzy & Smooth Songs to Relax)
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 0x4436b68df2fc96f6a989a8b771cf32255a5e9df5d8223d79f1516a551d8eb4e6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR59R1483673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c3ca1bcfa30287683a93055e45abdb3de9af2ade0dcd8c6afaa54f7ae6e06e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FR6V82715098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b730bb83638c102cfa96e57d07cecc5f96004c4cbcf3ec77b8a41b67240f3b1. 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/DEBL60732987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2bcdd3e5863c7dd5e80a08dfa66f4cf7a4ccdffd376c221ff2ce2b3b261994. 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/DEBL61152558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbac94e42b5912afcf0c101c4e28949e9760ba65e15e1176003073ec3a1703b. 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/DEBL61075551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42505f0ec325d79e3a21fa3a43da4bf88db9ac341c44c12699a33a5931a289e. 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/DEBL60732968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01363fa6c6bceba8d8ca268ad3aa37db1e508c31a8562d166e774b5b5f578a0d. 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/DEBL60793436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3276a3355aeb24a368d15c9dc36eb68c033afd38af2230b860b45b5f7378f7. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEBL61146970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4113bb3d820ffebc018799904c6701d2b17fe76e663ab0987fdee2aa8fd8f398. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEBL60560284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1228c12ece7b8ed5e19a805b8582d65b1ce803d154b23e4de3918ad06c35be65. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEBL60562910.
The Smooth Lounge Chill & Jazz - Volume 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab874b1f5aa27af89d1572fd1500a58a4535cadd06e4a1b62173cdd5d63735a. 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/DEBL60732967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42505f0ec325d79e3a21fa3a43da4bf88db9ac341c44c12699a33a5931a289e. 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/DEBL60732968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756d31578bca25ed8c12dd70f47f3fc68e87a5e1c92aea7c81a9a4d223df63c3. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEBL60732969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84414ac3b936e7c22a49d59713a835df6f4b54ccd06ee85ea84cb44e50833c27. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEBL60732971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6938667120e5129ebe02f69dc46ad6148679d805a5d942c3f37b67868ba04f8. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DEBL60732972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6d93bbabe07f62fc8f5caebfa8be9d3807530daaf24f7a001305a4db988448. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEBL60732973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8190f3495f585f18b2e0cb8c9509dfa3b41f36a5ab4643cd16dfd70e0f751f96. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEBL60732974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdca45571eac201df174442526072bc15a5e126ee017bf71231b21580ea488b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEBL60732975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e0f97c8be058e8f3b31ed8d1471cdfc67a6c0c01ad766591a7e6614878dba1. 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/DEBL60732976.