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 0x8999a4761fba0865c3b601ce9c59305e06e673ddae07895a404c6b3e101085c6. 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/70378631-6889-4801-b454-e85a713c2e80.json and https://artists.proofprofile.net/proofs/artist/70378631-6889-4801-b454-e85a713c2e80.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 0x422357602857a748d52d334190e0be2e7535fa7468e8a1cd69302ea286ec95df. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/ES5150261002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680d020cdb2e1a7c196b80842a69515a4da32ac5ed4d14e37b011ca847a50801. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/ES5150261001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54988ad9f64605f8403c0bdf1bb7213ebe1b33877b7b665ef046f647b3eb667. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/ES5020300465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f559cb9215d8cf94a85eb918e23788f98d7c5df8d5ffd578e60ee6c9700af5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ES5150561001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083cb2742c1fca8c79fe22bab2527b0c9c575422c669aac1892b3299625e8b82. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES5150561003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019eab4e035c66edadfce463310fda8167e6124b4b6ad9ceb61618bdcc41da79. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES5150561004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b80f7c141f92f163c2886f5323db486514b6007dafd75fa419258552a56c42. 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/ES5150561006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55531d9ff4d06d0b5b3f0ed63c63041e5e65be4806507de6256b37fa37de224. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ES5150800482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3102c51f0ce5e0d6e9f7d564525b2e71d26d8f01541b297a3d802c6d69ec187. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/ES5150800483.
Nana del Caballo Grande (Banda Sonora Original de ”La Novia”)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6722d4a194dd73e4179ea5b1775d8ff85c0b4148ab15035a0dea7cd6f7fb5ed5. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/ES6081730101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32218243c4c9a4d1ec6b2bb7104fe4375b3a4b1a48758e8ab5d1ba643709f205. 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/ES6081730103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06d26902c2582e0358982d1bffc0dd2dde7d886a78786c2f18d1f23e57de9eb. 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/ES6081730106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8ff85fae2ec0b5de71d0b362bc42cb1a784955a009c059965417296d6def34. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ES6081730107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a39fbef2b16e13587b9f0cf5ea3d0f267ba8c71af74cb4cd0f87bc8ffe8b4cb. 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/ES6081730109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb506d69284081c0be22e5998892edc998e408df7f69471687fa8d25ffc0bdb95. 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/ES6081730111.
El Tiempo Que Te Quede Libre (with Carmen Paris)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687151945b7d310d913eb9c74bdf38235b0bf804b7b04f3dccf6d87319d5003b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES5021300709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d787f232d9b47ce21098a321fd79e99ab35f2ac1d176afb9401e28d6258f08. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES6102329103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9653cc2a65e15e7617442436ba1acc992861dd52e0b45824b8ab41490dd63d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ES7730205496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9f890ba1aaf858b01a4b318fad1e48ac35d9b5851e27829890ea3915369fa4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES8242201111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4bb8b8bc4508d34685a461c0319187b13788292585ac6efc86aa519adb2d4d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM4TX2249376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3601e8e6dc7cd10d8a44a3ac602ed5ee0d224cfb28f22efe30980987ede4ebfd. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ES66S2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc002b5dbb12db3d6df654733a736b9307165b9ff85a4387050163617d276d81a. 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/ES5150561012.