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 0xcb6e160251614f90aa71ad98b3a0a3d2b8b9a23ebb40a6e029ffd616c992034b. 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/891c2cd4-aa67-49c9-9aaf-66c760e130c8.json and https://artists.proofprofile.net/proofs/artist/891c2cd4-aa67-49c9-9aaf-66c760e130c8.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 0x0f4a8db94e412478b14db35b47f4b1eac551a94420f67c55780e5596af1ed731. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZS7J2210717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ff29820b6d444808874548d0bc2ea17981940f52e1ef57056e801e7e3bf0a6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZS7J2287872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9308b3194adddb35cfa26ce689295fd9219ddecd69c57036933c55ae7973fa. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZS7J2295041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328bcd4432077fae38fdc513c44517392af1750f1de358129d0bb9da14b8d1fe. 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/QZS7J2253056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55b4b60bad1a51079befaaabc6655b2bac96e30af708351ecb8029a6b424640. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZS7J2280201.
Canciones Navideñas Tradicionales, Vol. 1
Popurrí Julio Jaramillo: Ódiame / Cuando Llora Mi Guitarra / Nuestro Juramento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04df94cc6782477bfdfa7084f80c6fca1e6592c75cfaf9d449a61437c1413f0. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZN882255936.
Popurrí De Pasacalles: Las Leyes del Amor / Apasionadamente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329ef7fba1031708b5079ab828b4ebe5b6df5399c52e2f508d18823a98d697a5. 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/QZN882255941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede6cb00d5d6ce7fbe4cd52d9c31819ad2b9afc1032dbcdb42c9754e6dc44b71. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZN882256095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbe24eaa548ed3efb1d97292fb3dfe727772263fe47c01579a8bf97cf13dabc. 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/QZN882255985.
Popurri Carmencita Lara: Penas Negras / Mala Sombra / Los Cuervos / Olvídala Amigo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030ef044d3b877c0ddca9f8bdc8bce99cb98bf80a97e1456772aedd9fd23145d. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QZN882256049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb421b518c81a0c92f9d1333099a87c8954c914343bb265b5c8b45c47e780413e. 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/QZN882255950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446183d7d9ab0d297c55639344ce4733044f266c8613858548c45b3f0d7cfc69. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/QZN882255951.
Popurrí De Albazos: Triste Me Voy / La Dulzura De Tu Mirada / Tormentos / Dolencias
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bb3bd79a27a2906041da9d5fadcfb15e6474436056b6dc132d87e19e075990. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZN882255956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbda77eceb7d5fc2fa17f276ad94b0e33dc9fc68c3dbe12f04d55e0999764a8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES71G2418003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152b985c524e544f0bad338c80e45696f9c019c3bcad5494c44316ce6cb40b68. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES71G2418643.