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 0xf7e967468187fdc2c148a21d73d10c80b27b0372a507ce107fc999cd33f4e277. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb994da1-3013-4f48-9a5a-1488768ce042.json and https://artists.proofprofile.net/proofs/artist/eb994da1-3013-4f48-9a5a-1488768ce042.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 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 0x57d5859cfbe6f4b79bdb082ee120a90185177bc624f84a2682924d7c44d0823b. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FR59R1655381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf625099782102728d7d13d7da2d9839a79c4858323933a8151b9ba371b0acfb. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FR59R1655384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2765798f5afbee7a138af809fd2fb6ca05bbf0413b0d656a72cb8545d204ffbc. 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/FR59R1655387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e2ec90ab8d39a5981df022539094d02615f90dc72f573395e2156f62773cee. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR59R1655388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89392c4ab2c71358a14985612a26d84ad4496d641546846241fbb9ffff4b94fb. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/FR59R1655390.
Gustos y Zapateados, Vol. 2 (De Guerrero y Michoacán) [Con las Mejores Bandas]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3515a38352d749f3ddad78b18f4c21bf389fe70f9e631038bb54dee4e89cd95. 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/FRX201616780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b1dbaa3d7b495669c9089541048182db727e24bc364a6b7cd8014e0bb0f054. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRX201616781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc775e7995ea55419c776d6cb0839ff73d0aaa9d7b8a91b6603f43d533e1afea8. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRX201616782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf2915d371fbbd17a90083b23eacedfa9de161344505000efd8a5cbff7ef3f2. 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/FRX201616783.
Banda los Costeños de Zirándaro Guerrero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538f5aa123ee845adb201592e62055a68e7544a12ce7163859e09ec8ce2a9803. 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/FRX201616785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4579ab88f1c1989bf9f4886c1c247e0447b0a2b8d1897a29c92a6c8bfd880f6c. 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/FRX201616786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fed67e5fb10e4518b9db9e185920ed78b0c075013816104b95defb6f0adbe3. 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/FRX201616787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a466338704e8a3dd5af5e2c759a88605c13961f0e48ba7108ae63374fa8b714. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FRX201616789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ba5e9f6b1117b647a545ed31161f83a6cef7b67a33888baba90d63d34f73cc. 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/FRX201616791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c43dba7d2f0e4ae0fd7a49d315d22b1df0f150dfbbd45eccd703fae9155220. 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/FRX201616792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7985a07c83add0293d987d46cda2c9877494f25aab1fd7883794afb577afb8c. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FRX201616793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edd53215c31d9cfc8ae7a140faab438f7b7b7c80a0b4811754d7fd915c88e5f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX201616794.