Silence 4 are a Portuguese rock band, formed in Leiria in 1996. The band is composed of David Fonseca (vocals and guitar), Sofia Lisboa (vocals), Rui Costa (bass) and Tozé Pedrosa (drums). They were p
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 0xa96f765835ab2a14d00e389cd670162c3e55411db0035da85423b695d46024ea. 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/65b50c31-8105-489e-b326-dccd92b9cd94.json and https://artists.proofprofile.net/proofs/artist/65b50c31-8105-489e-b326-dccd92b9cd94.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 0xedf21a1f23e15f5166178e58bb5691772e49d8b6a57d2f7a4e1d3c951c49d4c7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PTAB19802073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb48987882a3fa57f414ba407ba3d2a4d4e53d890085ca554ac687a67fa91a3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PTAB19802080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa46c750d2701e832809e95370e42f371a55f2602a7677862ff540eee0c790e4. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:40Z), 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/PTAB19802081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddeeed3b873b4223b1ea133bab88e864b31d7aea40a19a43821d331f0c008aa7. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/PTAB19802083.
Teeth Against The Glass - Incl. Hidden Track "Sex Freak"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6707b1b83e253414d36919f0b0b3f349ebabc345cbc4b90b310a3fc71a20047d. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/PTAB19802085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e8351457f0f362490427bdbeaaa0be87efff515649165f5cd61413a7989fb2. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/PTUM10000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5b5bf17221159f62920533388eb24017bcf74fea9993958009b0dfa8339c34. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/PTUM10000098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c9a4f038fe330bc9a87a50940979eb2482e38735d9dbd9e2b26962ae6f53a2. 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/PTUM10000099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4a4500179d13fd58969b9082f73d32e75a082363b428f77192265a9d5aa62c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PTUM10000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a6972d04af7fb72c6048627d96065b0c25c1dd4fdebba2a0d9ce053cbcb86d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:47:03Z), 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/PTUM10400254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd086c2210e692840ba472b3b1c560014f2dcff05368b9a7e8fc707cf04ffecbc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PTUM71400435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09874b3df27e2c92d1b0c827eeeb6d86cfa8d8df11e094ef0246e9e013b87137. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:04:50Z), 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/PTUM71400441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc7403c8da5dab31957b0d95157bf01679ad776272d3ffa8ebe1d0a40d27947. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/PTUM71400445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33871bf50c00a7234a30c16e875b9de40c25eeae842f6ddc9130edd9be87837. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:08:52Z), 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/PTUM71400446.