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 0x4cc7b5ec81b6c09449cd36589f131ea5858e8422eef9068c8929be49ff4f289a. 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/c10914cf-ba0a-48d7-acb0-5ca34c92b881.json and https://artists.proofprofile.net/proofs/artist/c10914cf-ba0a-48d7-acb0-5ca34c92b881.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 0xbea2be287bd2fa968a643dc2cf822999c0ce0dbad0654ca5fb1a5b0f3ea64d15. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZHZ42068189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040e9fb88a8749499a8085a1a51ad0b435fe98e656255f13f9e93fb5d7a32df5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMZ92010393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adfd6317e2d9952e8a92e74f502827e62081dfbc8bc61ed61fd0c17be5555ac. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/BCWH62100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc243a3bf0c0cc32106b22d156dc464ed90b3d2c33d773135dcd183bc4fbfde63. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHZ42237844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f97b8371608e93bea660d982e03e3c1c2ef96098e273df8467d225e4a08f394. 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/BR5QN2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f96a92ad37942b51fef9479b9a6892c7f58274b3d3759291f6ccbd4fc9f552. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BR5QN2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe878453f4eff3698d2a7a3ce2e31a847be995a3a9815d4fbe7d99ae03725a9dd. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BR5QN2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9919250e921418edc3258a123d252f5855a6b9463d152b9152a9089e4e7ddb. 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/BRUM72302141.
Nós Iremos Ver (Ao Vivo Em Brasília / 2023)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d4f70f36fa420b4e91a601696370ede6e536450bced71b9763cb89e1987d6b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRUM72302135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59467d4e2ac580806871b3180f9a13bef9aab2899f572f2c568dd596e4c63dc5. 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/BRUM72401828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bf84c2af3c1dd0939ae90bfedd9ee2a25dcebd48e3253326be60e6d5c7f57a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/BRUM72401829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe380cda95f7a6985f9c2eed9ca165a12b769d39c0bd0152d32f2426a773c1a06. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/BRUM72401830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99d89af956882768df024ee3bb714d66341af77637aae61e7e1aa014ef07869. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BRUM72500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b11f88b014b051a51bc2445b0be584eaf60fa27780f5ea54d6ba3b2e8a893d. 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/BRUM72302140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7c24600c5b7ad204963168537cf487e11b702e233713449686270339abec03. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRUM72400668.