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 0x023a6740ffacf8bce04a1182143f87022191a51fd7ae17ff813d23cf3bb7d484. 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/11e9b6bf-7afe-47d2-b475-25f6584599d5.json and https://artists.proofprofile.net/proofs/artist/11e9b6bf-7afe-47d2-b475-25f6584599d5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
LUCES DE CIUDAD (feat. Álvaro De Luna, Dani Fernández)
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 0xc73f59b1cf78d92190488b932b1d20ed83f37430e5a2187172d88a925f0684d1. 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/ES5152300604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58952deb558a641e99f78deb6b51333a458078fd3c6cb8eae941ae1230cad34a. 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/ES5152101203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841851d98db7fd4f6903f75e676639f2fe8db01a05c106935482f49192266e6a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5152100671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc840bde885cedaa8d6be398d21088a624ac530adc29aeffb0b0673f321f17c54. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5152201704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3ab74924416884f9d5ca89c8805d2f89797a40521f3d91e70e7fb41d1024ec. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5152200092.
Soldadito de Hierro (feat. Dani Fernández)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7680c16916ce8fb311755c95428eb2c0e0dae2157a58a4d33d64ffc101a5a21e. 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/ES5151900995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7680c16916ce8fb311755c95428eb2c0e0dae2157a58a4d33d64ffc101a5a21e. 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/ES5151900995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbfc0a9bacd51148143481be8e8f03e596230156752cd6baceb5c430de85420. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ES5152300224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26aa6e778cee1d59ed71537db2feba77045f48af1c4cc41929aa1b33a3898d4c. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/ES5152300714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26aa6e778cee1d59ed71537db2feba77045f48af1c4cc41929aa1b33a3898d4c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ES5152300714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022ce6c5eb73228553ac45002a9fef9f049ddbdb3e552c72463caf6168fde19e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES5152100262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73f59b1cf78d92190488b932b1d20ed83f37430e5a2187172d88a925f0684d1. 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/ES5152300604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61943914ab2a2c942cc5f42fdd72fa2a4652ff00b192c593430f5ef8d991ad22. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ES5152300599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c451581dc2aa2f6edeecaab87385dbe5bfa43ff662deae9788a57d3bef453c2. 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/ES5152000280.