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 0x9c7323bb7c6420c9f877d7aa172cbc11f92864162ef895c227a53451f70ddf46. 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/4022f652-803d-4534-8739-1317b7d591bf.json and https://artists.proofprofile.net/proofs/artist/4022f652-803d-4534-8739-1317b7d591bf.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 0x9f68597a85bc31287379549195c7d59f58ae4b5fe6c9d26419fb13209fbc3701. 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/USA2P1567545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc24d3426acf6ef8fa39437cf968354d441d6288009b8e237a50a2af9ba73846. 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/USQY51460259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09b1a8ed0f0d2abf0852f69ec64e729b8a3c0b09099e0738cb2cae62f2a78d0. 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/USQY51460261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c71b65a54d886d5d62dcb8af4bbcfac8bcf6d4410ab3ade16d2645aad519de. 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/USQY51460266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a61deeda00dc368d8d724afd6c8c49de8481986d0320e7d1226e9ddba7a8e0e. 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/FR9W12013425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6488c8c4db905f5e69d9a7c62601c0a27dac569e9d2cbdd0aadda66e924b390. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:26:11Z), 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/FR9W12013426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba72c047d0aee94fe7b3663061eec9b51e4c6cfccb32826f05cc4fcef693378. 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/FR9W12013427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf971f6a5bad22acf553129b2ee40ab5a5f8534b7c5752a5268517c20ffc1958c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR9W12013428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffb9ce27f137e2fa4b094f6f281802b09ada633c958db82594206c81c29fbe5. 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/FR9W12013431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd6fa77939220618b0c71dbef82a22ecafaa90cce4b38b184d6770d2814d458. 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/FR9W11723524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfaef79f3240a3a99c74fbab8e3fe1494002adccf9e4c048f846ed7950efb57. 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/FR9W11723525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1b96f0510497b7fd948b2d056a1e94c5249310c00d904f4de5066d0c6a4c85. 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/USA2P1547190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f819e0c95249d85260f64fa1c4bb30c7755dcdf7e2935e59e680dd28295565. 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/USA2P1547191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad1f2e71730885a54436d239a9878f2eb6f53c318c87b6a77a2b1126d9e3e7c. 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/USA2P1547192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac35671ad49dd0493bf2012d643bb064fe89ad9917e138b6a21d2b66d6447f37. 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/USA2P1547194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7544066b410cdfc20cd0450852e650abe30992c1147a62760107229a0d66fbfb. 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/USA2P1547195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac691c7e6bf8e75aa2f3f5839dcaed207f68209b4223ed7002bb2143cb18def. 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/GBKQU2415974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38488e44b4bfd79dd15d63df6c7dfb50d4cfc1f9fafa3d6cf66bf6642108bd87. 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/GBKQU1718713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5f2ee87486df5f655ca1b6bd3a717105ad77dafebe30a42ce54033eb3d2698. 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/US83Z1210400.
Shades & Echoes - Finest Dub Techno, Vol. 2