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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13351921cf7b6a647e8ba076f3e42488c8810f89cb0cb98cf02504a2cdaf6571. 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/dd2e7830-3193-433f-82ac-56e83058ed13.json and https://artists.proofprofile.net/proofs/artist/dd2e7830-3193-433f-82ac-56e83058ed13.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214bbfa919edb8706d0157275ac43f6c86fd5babf80d9e73e16418e0b70c9a23. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES5099800610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5911871a87180284b9ea05a8795ea30f079597071e388b1db53537d91a6e4d6b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES5099800613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b6bcc3e6879e5e719c0da3f235152f947ba585548c80afa40e98ee85ac7dad. 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/ES5099800614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935e2fc26dfb49414668cdf79840c92bb92781f4b01d1b58a7c3ac5a81d36601. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ES5099800617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8878c449c64d22d2dbf7f6eef31ad808329b7b4affa941aef23b6f685929b3ed. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES5099800615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b7b7d5665c2dad69728821d3dd4d50dee576efe57e38d95313c43b38fcee96. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/ES5099800616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f870856baed35e969fb2a76f1359194f170a0f3f84469d62472862c77279e63. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ES5099800618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a090c9526c5b91dd8aa8ebc7228ef326f6eca1424408b1d11d3f3a0a2e65ce7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ES5099800620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d62e2b24b63331706e32f995485a7b5e0cd31953eb24425b0ded6f102d344a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES5080007038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd27e842a47307d881f03b60488801d52139ad6f21663efdf6a5fcf77e52c557. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:38:36Z), 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/ES5080007504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b48176f2cabe6f84dc2fd350efdce20e1b073f9f48098bf40129ff749d882b3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES5700700481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e90a62cc31de6cc7e7e98e2b862eb267f0265374e8f563d8bf3df7ac2bc1048. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:32:22Z), 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/ES5302575141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7985570f2cddc58587992a95da5ccdf3e303305ea613fd950ec8542d8c9d86fe. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/ES5302575148.
Cuando Tengas Frío (with Joan Manuel Serrat & Clara Montes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a6311dd9526f39c606925fda7799a330ee32f8175ef9b9e5d7ec7ae3fd96ac. 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/ES5021600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d9016a918efa2e823984f0ff91a6708d42466a02222d54a4a723204526bdcc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES5080100342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725d6cadeb9675f0a8149c4885d1fd885b18f0024cc7752ee86913fd45e742ee. 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/ES8431005011.
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 0x6c42e685f42fe359d7fe88c9e9fb55403b669c9c3238cddcaffe976b4bec02e0. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/ES6971700204.