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 0x0f109a8ea8cdf93bd49610d689777efa2e5b90fba2d44513677c883e0df60f3d. 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/cc767292-310a-4572-bbe3-946f9a961442.json and https://artists.proofprofile.net/proofs/artist/cc767292-310a-4572-bbe3-946f9a961442.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 0x718de7f06ce427be7188ca1484e11537f5226cf82381a1bb33963c4a12893a08. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/ESA011773638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc483fd1b4cc8d70a677db2144d687eb8e199dd1823df549941aea4f2a1d9e61. 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/ESA012154739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c1c516f334d263bc4b7ffc4b541ed2848e6a22ee0384dea6ff0546e5548119. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/ESA011767807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe698a2365f6360ff17437fc80866978f947a7367ea0f6a03f88e68b378c18eea. 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/ES51G2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cae052b5aaeec2ae88dfe50ebd601a5c16fde90d132557697823642cf9caef. 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/ES51G2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef70005c457c28bf40452fec46caf5447cf7bbfc854e42ba9584667493c66be. 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/ES51G2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e019988fe76620d80edc9a286895bd5a5e6ab639e276aa709805567738c394d. 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/ES51G2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603495c483f91f3be15c04eb6abc839dbbd18ee9e70d80e6001502e41908d0e1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES51G2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0e659e52a42454739999bde4135e4e678e3661fbb8ec48e197b5485c70f80c. 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/ES51G2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee5608143cfd417f0faf6d8ddd5b7e978449ae662ca05ad8e317561d460c4eb. 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/ES51G2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab5512a998ff2ddb9f02f7d95453fa5e5e94c5d60b68abdc3aae45a410125fe. 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/ES51G2400013.
El Ressopó (feat. Banda Municipal de Música de Tortosa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2342f9dfba2a3ea96614b0c5f1a302ba4095784a1cc14f5526ecf4d5385b04. 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/ES51G2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83057878ef099dd608645d691d3357ff2784c188e22a5699b79c3aaff85c9539. 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/ES51G2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268ad912933beda3561d54b813775ab06e11ca70e2c9fba6023301b4feeab3ae. 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/ES5152301059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268ad912933beda3561d54b813775ab06e11ca70e2c9fba6023301b4feeab3ae. 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/ES5152301059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3331adf68525fee9576caf222cdf9515a815d0423f95a7ceb4c9d9586ec9d3. 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/DEZC62333979.