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 0x0b99ce407f40f262593468c74d84b99cb4f024573b86552b88b31cbeeecceba8. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f486efc1-20b3-4d2f-be25-2cd12841b5c5.json and https://artists.proofprofile.net/proofs/artist/f486efc1-20b3-4d2f-be25-2cd12841b5c5.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 0x8991224b4ae8d019f9640bac55b6d1f8cb20e11a08b12869be3b0f55d0b0a43b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES21C1000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531cf7a15f99ffbcbe5bfffcbe1a2498ac3f6df4e96b6e29cb4aad774dbea81f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/ES21C1000121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bd02c05bd09bd9e86d2e6345641fbac70f180ae287344832da72871be4a870. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ES21C1000130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc735ca2a5451157a1c44e6540609e94e7d25b81c92411ef7f24dace5efb374e1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ES21C1000134.
30 Essential Celtic and Irish Instrumentals
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf78b7311c4d9f68bf33906a5ad4451b2d822801499a1c731fdb7cb029ca4a37. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/US5UL1303904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbcd48a348c57df87d416480541e835a41a71a9cbcbc5dc4bb3772794e45f42. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/US5UL1403793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8117ddbbdde1aebd2d7370b8aec8a33be92056d4c5295e95f807e00f9e2b820f. 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/US5UL0703141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49be2ccfc7b62eef1dd36f619c0dcca93df562a294a37281ea9bb532544a8193. 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/US5UL1233803.
Upbeat Celtic and Irish Pub Instrumentals
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f79af869ab25b93004209beb6a2ddd06118eb700cb58bd3744fdaa319f6962. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/US5UL1407328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84529e4b17fd51337dee0b34f2330b5d9777701d1d18d86885c612ce1a617fa. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/US5UL1445580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6ee39d6e5aa7d3ed187e0d262f58632af9090e4260adbff32f354ff9bb0c8c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/US5UL1440942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b804e79d141e089ff17ea8ae453b8a066e0f9023c9c7af100769529d46dc7d8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US5UL1319561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf78b7311c4d9f68bf33906a5ad4451b2d822801499a1c731fdb7cb029ca4a37. 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/US5UL1303904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b863185893d8444a3533e2a3e5ff27da193d8e4eba26ea7dca7d3b457ef9bc9. 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/US5UL1103813.