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 0xf77e80257dd2aa34f0d433648d05aa147dd987dbea5a6fed915a151b1f826f35. 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/ce12b2f8-20f0-4147-a768-7bc54edf9409.json and https://artists.proofprofile.net/proofs/artist/ce12b2f8-20f0-4147-a768-7bc54edf9409.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 0x0c4be5e697f79848b95b8772cb1780b30bd575ba957d64c0ce566a666e1320b1. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/ES6671401883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d101362833cea3e27eb772bf8f796930ff7e505245a9515ef00b02bdbe9d7f. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/ES6671401893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8d8719beac85427e502fc20e3dd27b959dfacf521b6c63a1b72becf3240211. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/ES6671401885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0f0c939f96bc2aacfd6c5c41eaa290eede01d79503bb37d9c72eabee7734b1. 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/ES6671401888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeddcab6e1bbebf6c571941f9376df02dc453f915a0377a81878e3c37f90665e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ES6671401889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f660b1f666bcaf2e02ba60e19b7ac72a7e6905edaa898681ac2d22c20f85ff. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES6671401892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aca9f65c976f5f1d84ece36ed49c44a41edea0ce29b5757054883efaf64f1b7. 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/ES6671603154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9423895b25ab2fcbd7321f8c95d9638b987813680ef8b2c306c3ce26319da9f3. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ES21S2000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df0826d55824c8a3b211f9046d9e59fa5203790539ecb490d8916a9875ea812. 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/ES21S2100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda20c49aedcf82075f682ec5f6b393d415e3a08023dccc60513b8b6073f79b3b. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/ES21S2300060.
Primavera De Colores (Canción Original De La Película "La Reina Del Convento")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cc57f941eb1903d156642644fcefac962043f7b04d4d80067a301e6ad7b30b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES5701900825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cc57f941eb1903d156642644fcefac962043f7b04d4d80067a301e6ad7b30b. 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/ES5701900825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1290d6eb925a67c3f39ed1adec4570eab02ae56e069174353033bc832d5d253. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJV2305109.