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 0xdde50a1d965961aeaadf3a98ce67c4c3df72339a6b8fa9b54d5e7fd152085330. 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/cceb80a5-5ddd-4e7c-9b3a-3c09ad133515.json and https://artists.proofprofile.net/proofs/artist/cceb80a5-5ddd-4e7c-9b3a-3c09ad133515.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 0x93c5d0ad283c730fa625bfa3078be11b1433c8e04e4de616e6ff0b230c50a6ee. 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/USCGJ1220034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac726303d584f74995af12faa81a1a189543fc2b2257146fce2743440fe47bc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES5279900509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad70d0cd572b2afee1ba394a9bbfa04d8b507ef80c43cd18ce2c53427d49f2c0. 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/QMBZ91429217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3b55ed91ff64b7850d12b68cb536648575daddbc3e0488b7402d6fab952763. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QM6MZ1504377.
Fandangos de Huelva: De Mi Pecho Lo Arrancan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ef17c7e426a45bea2b771cc7a5bb5031180cbffd50c0ab9355fb555f134bdd. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ES5279900510.
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
Grandes Clásicos del Cante Flamenco, Vol. 23: Salada Claridad del Compás Gaditano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5766303070e15f3b0fa30c2cae85f0333d1da87f24548b9f40b9e853b36944. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ES5270106011.
A Dios Le Pido un Favor: Chaqueteo por Bulerías
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb47fed8321fe420f3c230bdcfc2b29e8eb9299b867160f62e7f07c0c0bf9a2. 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/ES5270106012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df1459e18f95867fc523670fe6511a3a371ca37dd73e82c737f1a1f2a6dba1e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES5270106013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5670b8278c7ecdd6a983ad2dc1a23e775a3c9a2284f97f518caacc9d9a0b6ad4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES5270106014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba479fe301568e35482a73ccfed234b1472f73c0a0bde0839a2d1b042e0a988. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ES5279901319.
Mira Que Eres Linda: Bolero por Bulerías
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3caa92fde66e3ee62f544497cc5f57ec32bcd36c9506d113d0f95e0f4bef5f. 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/ES5270106015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17a13970ef1337ec95e4d1459a2ced25ea689a4a176462a2a79b16203c704e8. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMBZ91429218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52998af43bec0a0c01e12aab24e75f84bf9bb7836c33b6169a3af1407620c859. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USV291492878.