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 0xc3ae5f070f5446d152410b8b98bde40afdf62da1676dc944c5e048798aa4374d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37e76913-c230-4351-a0d0-06eb6bf49891.json and https://artists.proofprofile.net/proofs/artist/37e76913-c230-4351-a0d0-06eb6bf49891.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 0x7482ccd00fb289e30dc3f3bd4ce25986a429470e77d7164fc4cdf0f39fc8058a. 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/USAT20505414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378c5cff23ecff44b52fb648924c61e8a8707ccb3e20004af906d99750020406. 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/USAT20303041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61edeb63dd115bd63778319c23d61559d5cf090f58341d0483bcd6f2efd78baa. 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/USAT20505403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be3c5e404605afa57614391e484fc8f4646f889bf9c2aefaab276584ee9aa0d. 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/SEPUD1900208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fdaed8908c2a51eb78e8a2c87ba265613e7160fab7dfe0f5f7487e5466ad11. 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/USMC10400413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0756d17b6c4586eb392b3fdcaccdf765564ce3afe703d2e4b3f0d3f95f5d2080. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUM71816491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14864d98b3eb36bca2ccb1fa6a967ab36df9b5fe0b3830e0efac6a331977b51f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:26:50Z), 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/USUM71816502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230a780e206a5ea830c6be090c53113c442ecd60c9a69b34fc7d2174ba7aafee. 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/USUM71816504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb4e97a04451ae5c3d4b7d9dd055227729e399eb497787676ca9b16c5f99bcd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUM71816505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43051e90e54c414d7a3e329cdd3240166bc85a8a17a0b92cd7459d4a7826fd6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USUM71816506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e600c8b56b58febf40323cbac54473012391aaecff30a430174f7028ac319c8. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:37:07Z), 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/USAT20400991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26246bedbf3a3feab8df8fdd63d7083e680bb34b78fadd01dc03d71bed9fdc3e. 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/USMC16046775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f99d8176c013180b7d35f17f5b9bb29d3fdcf054ac6515a5f4ec297f4c02cc. 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/USMC16010020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485b054aca7544c069e9ad0bd3323e733c97bbd4ae3fbfe451935c14e902fa0f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USMC16010021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb387a6e523e237bde11520efd379628e7f65da7a1c2ff2dd90f4a42ce130a128. 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/USMC16010019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261174faf35687185bd62e4f769eb032df606aedc1faf93c8285efb1569cd401. 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/USPR36270167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa12b2ffeb8af2a8d2de35b55243e857a135e57721e02b84815a9eea2a051bf1. 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/USMC10400416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64515c9de816ce2755c1b3ab16fd165f8d6285a4dca648917263f58f09897fd3. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:11:15Z), 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/USGR10400332.
The Art Of Farmer: Classic Albums 1953-55