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 0x068a2dce6f1088971340542669836ab3d074679bd1c7da54d06b79c4e4bd642f. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac1bf663-832b-4c0e-9863-2a3c3c542c12.json and https://artists.proofprofile.net/proofs/artist/ac1bf663-832b-4c0e-9863-2a3c3c542c12.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 0x83fc9e26b07a1b9f3c60d6cfe251bb219f3f8021f25e1c2f0f9ad58e4dd1364f. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/ES6080882007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a9824dd3528002638ff4c81d643a74cfd8c6eab65f38e14c97f4578e482743. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ES71G2409252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6646b1283521fcf30e0f38cdf5cafd68b1d407b9aae71044c333ce970fecc3bb. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ES64E2485239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f979de523c9b3ae3983be009f2cf1001f39a63c6e9eff33500a2083b4005809. 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/ES64E2487109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed63897167d51978cc282cfd84d124e40ab999da090745d09f88f2c0ebb8ae9. 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/ES64E2487111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1094c8b432fa1af1a72943cc62fc8b10ad78e109c89eb707129b20e2dc4b584f. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ES64E2487112.
Para El Barrio Ft Jesuly, Danié, Esenando, Karvoh
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063d62cce421eb8bd0dabcb49124af71a8c8faf4e4b5048a614901a259e50098. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES64E2487113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758f0d072b7ae33bc9d371f83e1a0f123568d87394e09a5ebe0538d57c0aad35. 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/ES64E2487114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe461f261c911588427489bbf83ebb73fde1e37a69581dee4a9318d397b5dbc7c. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/ES64E2487115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504d47790b01703bf8a0ea1ef9a53be994d7d7f93c4a8b51f17fa58dc4641a7b. 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/ES64E2487116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280495750455165ea75c6003994b812e922bb3fecf94af884bea73dd994c3507. 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/ES64E2487117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f7b0781bbeaef4b3bba976b745d04071542185c1fa02dc6173ca2eb9cbb5d1. 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/ES64E2487118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f33bb54f24dc28ee12b2528e937dd6d603c66dd7f6070ccad5034d20787ff9. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ES64E2487119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb862aaf4f7cda4fc8a66a5e33bc67af0ab5ea9e60cb860434f425dd368e5d5f. 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/ES64E2487120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe525f97fb3255dfd1f4cb218c48c60ceadd5fb29e324c33f7a33029c82d6c16d. 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/ES6081242411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fe621a5427b5b885abf681ea2e96baf6440af0d6ec1eadba5e1d6514b5a428. 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/ES71G1704208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb0d6f9ae8ded3ca66f557264d66dd50d8971ab21e86cbcc18af79e21683155. 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/ES6081142709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4ba00a7c4bc3dfae09678b6c6b7ef965cef301be5d83e264e8969a0349bf91. 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/ES6081142733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d4f686763f8dd5b1feead6b78e612917477121c933d67da1eefbb609d4152e. 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/ES71G1630627.