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 0x2397d4cc5ee071c64657dbe57641faca6dffbf25e37371834a51675056cd205d. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b654527d-216d-466f-964e-252ece8c462e.json and https://artists.proofprofile.net/proofs/artist/b654527d-216d-466f-964e-252ece8c462e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vocal Music (16Th Century Spanish) - Brudieu, J. / Fletxa, M. / Alberch, P. (Madrigals and Ensaladas From 16Th Century Catalonia) (La Colombina)
Vocal Ensemble - Encina, J. / Guerrero, F. / Encina, J. / Vasquez, J. / Romero, M. (Canciones, Romances, Sonetos) (La Colombina)
Christmas In Spain And The Americas In The 16Th Century (La Colombina)
Choral Music (16Th Century Renaissance) - Victoria, T.L. / Pujol, J.P. (La Colombina)
Vocal Music - Romero, M. / Blas De Castro, J. / Diaz, G. / Pujol, J.P. / Rios, A. (Music in the Spain of Philip Iv) (La Colombina)
Vocal Music (Extracts From the Maundy Thursday Liturgy in Spain and Its Dominions) (La Colombina)
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 0x1d0185ea660acb6609e821ffc2e91b6a5c5e01252c673a4aa66bdf1dde191881. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES7890500222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc10599ad279bb19310f5cf91e12ac3fbacdf83268c8e9f3865e6dcc24fbe1d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:07:01Z), 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/ES7890500241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb75f53dbd870ca449396b3a287ed59023771536fc5215af470faa6e5070f304. 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/ES7890500202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe209d99b7afdb9b2db2d3ce57a03feffc41513672928266a1edfdea05c78427. 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/ES7890500226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63634c1c513c464327e94b0a7b885a8fdbbfd2dcfc9fb79e9cce7da8ab9e0819. 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/ES7890500245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1d47631184baf259494e9036af2a5ad5f215d592f0a8f7b52ba0b4fcf96dff. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES7890500206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca17059ea9f6e6d13894f619dcc2b80b3d9f82954801ea6e04bad1885a27de29. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES7890500209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe53e381426f883fec4a0be87d65daf90cb1e0e1b7269ad45596a0587bb34749. 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/ES7890500230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c5bfa506b8a5a58636f8697b92891892a49f6a1691ab159b4b1d41e9c32ad6. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ES7890500231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06b8389ae197a28884bf957b54246bcd29c88207fc70dde632c05f380c52eb5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES7890500211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe79b238478e57a8d212abd24df92c1c67a627d111318fcef5021333b10251e. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/ES7890500214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999755cb3719b00644514b06ca840eef9990e163e09f786a17985ee754575d69. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/ES7890500236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bcdbccf21a48d1f3ac2c5cc40d544d0792b310a4b2b985e5c916f970ea16c1. 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/ES7890500216.
Posuerunt super caput eius - Benedictus Deus Dominus Israel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4803804d28178cded952e7761e243e8283409dadcaee356a2ae6459c7a0423b7. 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/ES7890500237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f293cb0517310785585db2164fecc548098b4cad1ab92c7f16e6b102ac9880. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES7890500221.
Tomás Luis de Victoria: Officium Hebdomadae Sanctae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1d47631184baf259494e9036af2a5ad5f215d592f0a8f7b52ba0b4fcf96dff. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES7890500206.