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 0x684f96fadba642596269d40f9d725d1f7557b1b74b56b2e194840a35057b77ae. 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/a6df3ea7-195a-4202-9be9-63f1d380eb18.json and https://artists.proofprofile.net/proofs/artist/a6df3ea7-195a-4202-9be9-63f1d380eb18.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rebuznos De Amor (1983 / Jamon De Burro 1987)
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 0xb4a1ecbb48ceb308155f35d6383ad5ee6061da267a59ff1047021895714b54f4. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/ES5018784001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca765c9fa54cfa81685400b5df188958ab3cc2489ff0f5c8cb9f43aae6d4710a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ES5018784003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38c08382feb5731d76b86bbdaa4c1421a140729aab19c4b80f532438ad07cca. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ES5018784005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4560240d10edafa920c09ebdabd3dfc7eac1bdf65d6831a26f6de5638fc3e176. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:07:43Z), 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/ES5018384002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2709381bddb8a980b7ed546efb1c8db46828a30459819b819a8b4830bb749fd. 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/ES5018384003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5725a15a98e5d6699f325c43ed5c58b0ba6189361cc9010d2f3619b7f2cc9f1. 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/ES5018384009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841b800debd28a40c70e9ec6279cdea26aee662e50c6dd573698ff0d7a804ee0. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ES5018384010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e71e494b7f04ccdf91a5230e5735406e0c456f9dd4cb8df2e77aff79077fca. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ES5378900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda0de3b3c62ddb26a6a2245a699cc277fda2171ca99481e30e8da1b94ff3823. Chain 2 (Bitcoin): anchored in block 957622 (2026-07-11T22:55:42Z), 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/ES5378900047.
Los Grandes Grupos Españoles de los 80's : Los Burros
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f901d29fe5362e8c9e6b11a53644bba25754ce9cc39a9d47da666f14c75a55. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/ES5021500880.