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 0x4739673ead897395a4be27ee08b33b29ad0af9d66de60c357e25376e7d50ca2e. 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/358100b5-0699-472e-88bf-bbea5ab47ae6.json and https://artists.proofprofile.net/proofs/artist/358100b5-0699-472e-88bf-bbea5ab47ae6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Trio Los Duendes Del Mayab Aires del Mayab Con Guty Cárdenas y Ricardo Palmerín: 20 Éxitos
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 0xc5f77219dcc8cdf848920e91c6d15478a1260af67603b71851e58b95889ee8bc. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/MX2620281679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd313eb4cc46302073fab320e0f1061109d368966e578654d0a5e15b32dda9c39. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/MX2620281690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cd98f4e7e00ab211788d8a287f983f4d0ae002ef2cd642c34f1eb5ff4c7c5e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/MX2620281694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11eb259b7a906863bc6990e03dd0cfa78ad63e91f96d795f7a397fae3ae1584. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/MX2620281678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8dc64d22158f8cf7bc00ae4b1c6e3fd45ac48b6c067240795f64218acbb3b4. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/MX2620281680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c7f964054440d207bb296a6873d6b4addfd79e2ad739416ecc26c1e864259e. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/MX2620281681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6eab3dd3bdcd3c32d4f6116067cdce24c179463b11d78ec88a5ef6a87b35d6. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/MX2620281682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb3b5050e6918ed405714cf3dccf2d7151f02795e4660b6397ed4b2ac0d3e14. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/MX2620281684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8834238e80038d51a4e52254f24605e1b7ee50c9510f72122bb6535af14f1f07. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/MX2620281686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd313eb4cc46302073fab320e0f1061109d368966e578654d0a5e15b32dda9c39. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/MX2620281690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15e00b2d4ad8ad4b933afe775e95155dba32d772ca73d74c2214f72078dbb7d. 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/MX2620281693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cd98f4e7e00ab211788d8a287f983f4d0ae002ef2cd642c34f1eb5ff4c7c5e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/MX2620281694.
Aires del Mayab Con Guty Cárdenas y Ricardo Palmerín: 20 Éxitos