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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af9309c6cb4207fec99acc516cd6b322ab01fb77998301366b0ca9d6e59b0e1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae4f72a7-1de4-40f1-a62f-a6e88cfa2632.json and https://artists.proofprofile.net/proofs/artist/ae4f72a7-1de4-40f1-a62f-a6e88cfa2632.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf119db7b5288f597c8bb03a851f98bf22caa324be806c490ee79f4ba4155217. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:43:45Z), 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/CZA167000250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd611992c5ac7a939bf87ab8fbee7194df57cf009812ddbbbb5953b0d8ec91e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CZA167000251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ac5bb1e8344ba1f7460ff339931f802153fb8fb53ae68437c59a97f7b29662. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CZA166900321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdba12ea9873586b6dc802fa7b80457e4779a4e28a044030112c0965c3e046b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/CZA167000405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1d8b892788583a4ac4896133109db2f6f79ab26d50f719f1d35662aa03a207. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:43:14Z), 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/CZA167000253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45841b500e24d7a0914bbd77f9352d52d002d24c1269ca20f2fc78ff6e8840cb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CZA166900806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3676d97ac51ba4cf2481f9064889a7f252fdb98b514a818eec6afb12c1a56c7f. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/CZA166900807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36199076c3be75ebc2107529c7fe45de4d7fff488afff9119b154fd5442fe1bd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CZA166900809.
Je Třeba Obout Boty A Pak Dlouho Jít - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13c87e708720503683454a1acd05738fe429194819630d3b7852c5cfe9bd95f. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:44:16Z), 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/CZA160800555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8024db9d5608736ee4927638b4d53072548113b184f641e260e91c5d3d11df6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CZA160800559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36535acaf8c14bf9698d18252b3e41c69b93af97331150f1761e6c048982cd1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CZA160400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332d18494b22cab9086a2662789efcd11b765c5ab28242fabeb55ebcc8a4cbed. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:29:35Z), 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/CZA160400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3313457a2802e899970307fc435326400ef497d3479f21dfdce340fe456e9ba. 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/CZA166900466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3313457a2802e899970307fc435326400ef497d3479f21dfdce340fe456e9ba. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CZA166900466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61956677e21e1b7ee28f3476fe18b5956bf2ff026afa451bc8d9b0d2f7e694f9. 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/CZA167000254.
Velvet Revolutions: Psychedelic Rock From The Eastern Bloc, Vol. 2 1968-1971
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5ac443e1346bd93e83bfee3d034540ef63e96f1472239c3ab64d869e0c6216. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CYRLD1501225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3313457a2802e899970307fc435326400ef497d3479f21dfdce340fe456e9ba. 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/CZA166900466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3963dd25dce0bd2ab4a8198f4f7c6fe91d4c00850f924b3ac097727df74e8dc1. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/CZA540898212.
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 0xb560139b81e1dd0d7c541332618833545de3dd966863e27a4ba6c3d5a13df626. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CZA161000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f8d325f44d0618105ae290a9f4be9768623586fa6c00e5c2da1dfe82ad0435. 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/CZA161000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90471770713f13de55a1de15a1afb2a655737b9b0c23506f1211d15171b5cf34. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CZA166900467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752b9228b477bac7c0c1d8079af13bb2fdfea86d13bde0b2a10cc351b3e0fe20. 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/CZA167000252.