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 0x05b9d110c6ab9283b382f5be7c772a461dda96561c9ea313beeb3220d1c4ad24. 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/fd0e9385-6a47-424b-bce7-0a981ab58ee2.json and https://artists.proofprofile.net/proofs/artist/fd0e9385-6a47-424b-bce7-0a981ab58ee2.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 0x3a3e3550193727f74adf893537c7c2d76c14c546ee9cce572ec6c43b337f2d49. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES7712005304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cab9e44bc8984b32def8bd78649134e99f500ada5ae9d0debdeda5225c0b94. 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/ES7712005301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef146cfa6307fea3584a2c5dca49eee00e5ef3659a6380c119ecd91056a3a9de. 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/ES7712005302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9823eee4e456e2ce22a077cd79d59af653ea9cdff14f3f590bee31f1df97c509. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ES7712005303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3e3550193727f74adf893537c7c2d76c14c546ee9cce572ec6c43b337f2d49. 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/ES7712005304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbe559e12c2aa02b849eb0b2e1dd52d7ae69824de7e1c50b75384f8aef02661. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ES7712005305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3ff499434653b480820f34b6804b2b404fd44a09d5052b1ea8dfbf354b3989. 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/ES7712005306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d72aeb3f8638ee993621c6fd5b7019baf1361aa72df2ee2ebdd5ed68513333. 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/ES7712005307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee4498514a485454e24d705ee632694376496c12fab1d05d48ea914ffa0f7a8. 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/ES7712005308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ecf292615873c5e957fe2bc851e81f1d0b945c747f706819aea2a7087a5321. 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/ES7712005309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07e12a23d2eaa0b4828a3b7681c1c27c06a844e49c527d512123a80adc3546c. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/FR2X42385109.
Donateando – The Music of João Donato EP 1