Waldemar dos Santos Alonso de Almeida Bastos (January 4, 1954 – August 10, 2020) was an Angolan musician who combined Afropop, Portuguese (fado), and Brazilian influences. History He was born in th
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 0xf9868bebde214e41a67ab410233a5a371ae764acf07ec238be3957b66fe79885. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5413fac-fd05-4393-83c1-ce7344935251.json and https://artists.proofprofile.net/proofs/artist/a5413fac-fd05-4393-83c1-ce7344935251.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 0xd1714a7887f05152f1ec0dab47280d1b481a192895558a08e2b714f5088ba622. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/PTEM19000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67beaeeb56da33f0830288fab8431965909572fbe7fa0be859146650aee773fc. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:18:21Z), 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/PTEM19200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6e4b5b7308c6194326640f520bde88fe1afa5172da16bd5850d7c97abe4e5d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:40:04Z), 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/PTEM19200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1ff561dc671bf7ab07e26df4967379c32862a237e50490c3a8a87b260d8127. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:00:51Z), 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/USLB10210499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7475e5a52e5d97590a66ee5922d286edfaa2ea4ba0bf74c7f5ecbf060fb5d606. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/USLB10210500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc107b1ecf9a241f541f8fb8d42c8ac5a73063771f849a11acc6b74c7a0eaedd8. 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/USLB10210501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe5c99808b17a30f02ed3bb28a47bf3fee59e1644ed4ae1f7e8bed1619d7d1f. 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/USLB10210504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc160088830c67b9448af090d0c5a272193f9998c2cf9c8cbe90d2723ded7c05. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:30:00Z), 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/USLB10210505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9bd6caec715e10546225f13b0d49a92bc15832940798689b91b015c90d9534. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USLB10210502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500ea06b59f1fca8de5c2cd7f5bbaf5533b1ab30bd358b6d94d4d76f5ee466e6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USLB10210506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccde0e4a554e7d51cdd59e016dbcef481a72f9f49271b2acefa752741cc3167d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEA591208401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9be16af59b79d3bdfd9b5c6287dc31a21caf9a52b8cc3389117b9979c77bef. 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/DEA591208402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ad0ffc08213334fd026e13d02f5d0aa859c662b3f29cd19e6c8c14c62818a8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEA591208403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990de9c197eb573e3936fca613580b25c104effd8b89169391afef4840a328e3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEA591208405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e0ac761f36e01cdfa1e3963a3d241b965fee156e8590a5ec015f683e90dac7. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DEA591208411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202c9a9456e5e768aa2dd661e15c1f41e1fbaf629cc084af63e0a799cdc5d376. 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/NLA319900134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5c378aa9c5b5047245337ae9c459540157f62473857658dfbb275ba31b5b2f. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/NLD750600001.
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