Abigail Izquierdo Ferreira (1 June 1922 – 13 February 2019), known as Bibi Ferreira, was a Brazilian actress, singer, and director. In a career spanning more than 75 years, Ferreira directed and perfo
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 0x84379a3b626654e6580bca1648e2a02cdc4a01493be3d9c194da0e87c936f056. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31a6dc85-9b30-416a-bd38-bfbccdc4e56c.json and https://artists.proofprofile.net/proofs/artist/31a6dc85-9b30-416a-bd38-bfbccdc4e56c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Brasileiro, Profissão Esperança (Ao Vivo)
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 0x7d287dc31635e2c1bf57fdbb337d800a641a50ff6edc5e505d95040663a8550f. 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/BRPUI0400214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d3a5d470bc0b09e79db8a88045207959cc1a203ba94fefe313631d57131481. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRPUI0400215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bbd1833596e7e2ed6de34e87bbad561ff801b5dce98f4721e791da377f14c1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRPUI0400217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81049df3f8b2f714c5111ff1e75c6b87ae7cd2e97a65746ca6bea368133172f2. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BRPUI0400218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09795239e28880ac9eed7be556e600fee0ee4e15a96ae6e874409cca308cfc66. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BRPUI0400219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fe8d2cd6a78feff566e8553c04942b0c8cf9b641cf18d85b2468ed8ebfb8bc. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BRPUI0400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68468ea7f8fba02bf6e2757bd0e907719b5e8758618cbe069defb725e09c29a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BRPUI0400221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd43bc9036704bbe9bee87afaceb225e668cdf5c8283229658df85675f2fefe. 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/BRPUI0400222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee70e118afd1ea6124e5d5ac64dc587726cd40ee84016e5c016cfd7541f995c. 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/BRPUI0400223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2e2d20c11f147f49a6b8438f21437fb0862a3423417cf0b6f21608b9e490ac. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/BRPUI0400224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b68b21d61c8e039a0d2578327c021fda1207aab06fcb253126d01e22402fcf. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BRPUI0400225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5422efb9f21fc19245ae77bb017b17a2e8cdf7088a17898722677eff4e3d275. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRPUI0400229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211bc34f8b918f15de86b78e8b880753ecb1ce719cb1d285631157c42a203e1a. 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/BRPUI0400226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944def64c6e8b981bd7945fa66064f06bb4884adf6e6d503a77dd4afac8b347f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRPUI0400227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45056b8a3f697d1fe560e149e8be3d85fb06ffc70c2e4a61a3f20130cbd771c. 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/BRPUI0400228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9785edda60332c063955488442355d4db5c8a8da835cd6f302287f28942cf7a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BRPUI1200444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54f2f8c311194e13bfbe620996bd1dc2884e340684c632968d8aa4a84d96cff. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRPUI1200447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110a437b958bc2d237a9b32fee0f4287c93a452a1b3c5b3a946e73d859b02029. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BRPUI1200450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffac6ec01c8c46238304126b029e4abe3c47d21444ccf972fd1d67474d95eb4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRPUI1200448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833529c481aaa7a5c1c4c88e229dfa38852c62d7fb4064e8c3637b62669e9504. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/BRPUI1600193.
Night and Day / I've Got You Under My Skin