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 0x02136c14afe30817da4d2b57d3746f3a0945caed54b8a74ee0fbca56c894f188. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11e7ca40-5fc6-4957-b374-e4de34c2ce6a.json and https://artists.proofprofile.net/proofs/artist/11e7ca40-5fc6-4957-b374-e4de34c2ce6a.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 0x7298c53f9e01f49c225821d83ef99714c340e112876325575781f9c556bced69. 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/DEMV92400307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e14e5bcda89756b78d5d89245b1e307c7af8753383dc1495020d33b993b49c. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEMV92400310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5808367258fbe3b53008f7ad5bb1137bcac64df909772519814f19a7e285287b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEMV92400313.
Lonesome Train - Live, Cologne, 1978, On a Lonesome Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15a10cd709119451066a9f89456c28335c3d30f87759246c4e1b64961af0279. 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/DEMV92400318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29006622bdfac95d4b3b55f668a1dcea52c63f8e9a970145e96d3a4e22e5c2ba. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEMV92400319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49673e69a336af6f32c93b71bc4b32d9e414fe1b200268ed8c15891e7da605e7. 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/DEMV92400320.
Baby, What You Want Me To Do - Live, Cologne, 1978
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e600e58821662efe556fa696fa40bac972a94f58d953b0ded37637af487438. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/DEMV92400321.
Hot Dog! That Made Her Mad - Live, Cologne, 1978
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbe3270b9f74953c63feadccf43df1d79da5e8ccabcb07b20305426e9b3f954. 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/DEMV92400432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d7b76b7f206d4f2aefa34d1dd8728470f3a388950ff4f21bf0baec23a45af4. 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/DEMV92400433.
(You're So Square) Baby I Don`t Care - Live, Cologne, 1978
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433f1f3d6903c2634f9b1c19a8535a8485e52b550330cbc1555fd906e64198f7. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEMV92400434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8994058d6b9ce8c9f45582a494dec1b34fe7e1a788f1fc5dae736af976fe71. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEMV92400435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1dba1433672793f7989dfdddb5440e8c1536cc121ec3a60a15530b62f95723. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEMV92400436.
Baby Let`s Play House - Live, Cologne, 1978
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6d1c5a33fc8cadc6471598e6cb33ac66d231156884d081f30efd19d522a8c9. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/DEMV92400437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d05aeb60578a49fd06e67568221e87873fe47be78914c5419c039171dce4a9d. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/DEMV92400438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c70633cd5963ef3d56c5e3ccabe871dea1ec39ac5589dbed217664f73cc94b. 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/DEMV92400439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca73b71dc16f88e89bfc01c33073b95a5061e6ffa8d5abe2c228f03adce76d7e. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEMV92400440.
Hot Dog! That Made Her Mad - Rehearsal, Pt.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea6bc53d4af960d9640fece1e553c29cf0f8b5cd7253ef0a95e15997f1900cf. 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/DEMV92400441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0576a5c191e0e98f4ea8118f3247d2c88f6a8110a7390eb35ef33c3c65daa796. 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/DEMV92400442.
Flyin' Saucer Rock`n`Roll - Rehearsal, Pt.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d698fe22bb5b0435328021df0605a2dc0a4f61bc1110f8967c8db71d3c6252e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEMV92400443.
Flyin' Saucer Rock`n`Roll - False Start, Rehearsal, And Complete Pt.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec113572c18d2a92d87201b50eef0cb20a45c8e80e8aaf55eec1a5cd9dc2fb2. 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/DEMV92400444.