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 0xd4f995dd4581c798d9288f69051565cada15cb613cc5d6a0ec25e3b09ecf6e04. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8019c1b5-bd7f-42d3-91fd-9f60e1c54787.json and https://artists.proofprofile.net/proofs/artist/8019c1b5-bd7f-42d3-91fd-9f60e1c54787.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9dc13c83440418439555e6a58a6c05361cbd47586366ca6d924a7cb28419d6. 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/ES5350702271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbcf258f1fd0cdb91efb92e5cea93b71aadd45628a5e7fba4df8be7f62454e7. 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/ES5351002753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fc3623110694d1bca37f2033c7663f85fdf707899dbae7d500c00d53099874. 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/ES5350702641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cf624843cd440959da0a452dfa3f1a6c2335577da8873b8ae9466f0b1aebc8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES5351002767.
Ya Huele a Feria - Guitarra, volantes grana - Cruzando el puente - Ya están los sevillanos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386022a53385d0759cf8dab798e9735b0befbf8d0752270fe6bd778ed6ad1c25. 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/ES5350720271.
Popurrí de Sevillanas 4: Ya Huele a Feria / Guitarra, Volante y Grana / Cruzando el Puente / Ya Están los Sevillanos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d7fce396242940ab597fc0d09855695236b80452917c7e67b19ef546af52b0. 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/ES5350702497.
Popurrí de Sevillanas 6: Mantita de Romero / Van Pa la Feria / La Tona y la Malena / Deja Que Te Mire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fc3623110694d1bca37f2033c7663f85fdf707899dbae7d500c00d53099874. 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/ES5350702641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ff9d99f119b453eccfcb645cb828077db63778880926e256e79470e767ef34. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ES5351002749.
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
La próxima Primavera - Y como está el aljarafe - Toros en Sevilla - Aires de Triana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7239804764256dc7e22f5a54ed5134c4a0e496bc4960323b14073771913a1f4a. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/ES5350720273.