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 0x7c72c43a14047a897c7f84a0fe8444f4619925573829506de3a3dec7d6fadced. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a83e3c9b-bc5f-46ac-9457-5c4a5b7397aa.json and https://artists.proofprofile.net/proofs/artist/a83e3c9b-bc5f-46ac-9457-5c4a5b7397aa.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 0x7bdc0b890a9cc2370a267ee0de621c61fb359d065efce8f718a284b7f80249ee. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ARG9Z1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd716532a97c5e1f42035acd11ebe7e7f0a187ef34d31eefde059915454caef33. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ARG9Z1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f803fdb48889536b22006ee2feab42b73a589ecff702075b732bf5ddbfdf364. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ARG9Z1500003.
Te Quiero, Te Espero - Versión Sinfónica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672e896f0b1b3f5885fecb8cdca535bdf075839bd071e5564707b0fcb481ac50. 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/ARG9Z1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a349bec5b57ab3432917378e708e4ea0de3c519708ed029740b4ba1499650e. 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/ARG9Z1500005.
Muchacha Ojos de Papel - Versión Sinfónica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9eb6f6a3ebdb02fc3c4b25376e9a168ec99ffbff76f81611b0ca40ea7b10af9. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/ARG9Z1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf041458d346bb91410ac641ba7cec77ef9ce932fec478bed35ad0eb21c40cbab. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ARG9Z1500007.
¿Dónde Va la Gente Cuando Llueve? - Versión Sinfónica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52b66befeb4f27ccf0a47eca22f59daedbc2d6101bd0bbc423906f9b91b940a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ARG9Z1500008.
Del Gemido de un Gorrión - Versión Sinfónica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc4b8033194216a3c66d40fc79bced1af0b1a8ee320d629888a0426fa3cb3f8. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ARG9Z1500009.
Nunca Te Miró una Vaca de Frente - Versión Sinfónica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f773fb3f7da6d55fda6e5e5e419d20cfea7fb741c6c3def6fe9950cdb142821. 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/ARG9Z1500012.