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 0xba8f8f66c2b7d298eb1c5eeecb8890aa6a26d135e69bc18a986da7502335383b. 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/720807b3-f1d7-41a8-959b-7bb4c3c74e5b.json and https://artists.proofprofile.net/proofs/artist/720807b3-f1d7-41a8-959b-7bb4c3c74e5b.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 0x0010e2125352745d8bb2c2c6aa81f80aa4520dc9c5c8109bceb06bf203be2bad. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CLDG21400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c0f72d90a0fe1cae125744dd248d67962449f1b2deb4d529892d60774a805b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/CLDG21400160.
El Amor de Salvador / Cumbia Que Te Vas de Ronda / Que Tiene Ella / la Revancha
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e7502486eb260af35576f744ee1cacccbffdd54b2017bb714dfdc59d715ad2. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CLDG21400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0408fa09bef8cae04a13703f00e9b39ec28eb0ede2c896e032f28033d6738fc6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CLDG21400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659f88c1a7f08a8a15585276366086b99daed5daf9eef8729d294cdcea87b0fa. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/CLDG21400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64213996be050eef70c37a7218ed4959bbc4d0d5e4420e80d2392c791b701f70. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES71G1743078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f8991c1699e3eeda13ed7d19b9a62da1dba4c00ab9eaff44f64f2b07672004. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/ES71G1739204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de7b31f7799ec73ce3d2360d4f7e5ab23f1f3d64df060e1d9e8b457f87e455f. 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/ES71G1743069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a9ff59e262d6f39e93520b2b39742d9408011edbe8dc7a1672979e276086f5. 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/ES71G1743079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd614850c1adc2c0bcd1c5adf7522a57e7ca4d099560698e7921a6df8df1f027c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ES71G1743071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87fa019ba60b6c069de7db4edfe029bc6fa37d455f87da8fcc4cd6599877a16. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ARIXB2204597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc137fe6d7ba24627ad0972f6a5429c4cb9005d8eaeb16c1d3e4818545f9de5e5. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ARIXB2309864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfa8fdf813ab3b7a93c355d53aefef85afa67be3b1e9654a1f4fe569e2720d7. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ARIXB2309865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33e7d93af382024dfae2a8652bfe3ae4b06465fa50e90f96c510ed2049b91f1. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/ES71G1926548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfa8fdf813ab3b7a93c355d53aefef85afa67be3b1e9654a1f4fe569e2720d7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ARIXB2309865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972383e6621d1d1364d97b6fba7344b21340b85fd1ae54f32e279bd05aa56ec5. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ARIXB2309869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33e7d93af382024dfae2a8652bfe3ae4b06465fa50e90f96c510ed2049b91f1. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/ES71G1926548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87fa019ba60b6c069de7db4edfe029bc6fa37d455f87da8fcc4cd6599877a16. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ARIXB2204597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5860131658b87b344abe16914d2d977f82dac9ed270eb8c3652a6b541331b0ea. 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/ARIXB2501821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb8eb7f7837ee8ff06790eac498ea41c7c28532bef408de9823ba7907b8aa8e. 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/ART0G1807106.