4B may refer to : 4B movement, South Korean radical feminist movement "4B", a song by Terminaator from Minu väike paradiis 4B, the production code for the 1975 Doctor Who serial The Sontaran Experi
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 0xbb8efe44a301d770d12cd54b346a83f1938e2726d07e1806b0a670e520a14b75. 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/ba480566-79eb-44dd-9095-1d6ddcc90f45.json and https://artists.proofprofile.net/proofs/artist/ba480566-79eb-44dd-9095-1d6ddcc90f45.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 0xdf1687dbc36d2e9d81abfb8c9009d55d3da290f98a97ec01edb128bbb6ec3cef. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/USDM31568801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990b7ba2aafcb1d8ad8e8a0dfbbacd5e0b1b64e41a5b14a47c7ac025f9a8a782. 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/USZ4V1600180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5474b1a75942be71c2f21a9652adb3225787b127cecacfa535c373d318c76817. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USZ4V1600179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09330bd2990bb50fbb37bf7652de5bf2eebd94002aa8d4b1132c416687513093. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/USZ4V1600178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cc681006b6dadb65413f74b4f2b4e67ca0886a273c81c2a3c802b6c5becf77. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USZ4V1600283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74684b2e816c44ee046b8a60d1e97e6f2eff718aaedfb560f7682752255c69d4. 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/CA5KR1714201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d87e85b3a2857e2f3fe0226845112515b5f5905cfcc947fcf401f9cd864bdf. 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/QM4TX1885015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf056a1a579c70cd3423b25b214e945874bbd089e96eef8f78cae0ab8c00a1eed. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NLQ8D1800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3855bef8135a4e2b246d297f2322dd489ac7a9852f3939c09a03ebfdbf6d8a96. 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/QM6MZ1887806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc17cbd8a19b6ed65ae5785b5a67554d7279849ff01156060497f9c243e421b4. 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/USUS11900247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7a162afb089d00f4b7304de01a4e986f1b76ebe5a5c5413d42e020c262e1c2. 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/USUS11900443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12afb7d17d4597c424c40ea6cf3c6b78baa9ce7973827b4ccfccb0c2427b31be. 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/USUS11900493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595b0ee4030e36afde22997ff24c3e44f54e89d09bf50edcf61bc7c2969059b1. 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/USUS11900494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec2e6d651b9a5c444366dbe0e7c2ad2230fa5b53dd37ab1ac1cd34d50ae7c20. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QM42K1917050.
Lucid (feat. Abraham Mateo & Austin Mahone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32fd2058f5d8073bd26ee63369ec8b5aef986753f36e46a60df92fd53afa5b8. 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/CA5KR2239226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef3391998072afd8e966d411d4a1d0c53c65d80c668cb724aee843dc3f40583. 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/CA5KR2316932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f2a2405f19a07d2b429d94f65438b954206ea89280df101b94bcc8a0847d07. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USDM32356701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b39b2dec6d23ad2598f09004c9b17bb4a08428e49c89417ce96032dce87464. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/USDM32459801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2af078e6b9f5e4d325edb12db655a8e6818a318202936bffd44a842cb9b73e. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/USDM32463401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84dc67bdef52f9d10f6a03cfb1eb86adfc09a181ec4f0654eae28c8c2b80693. 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/QMUY41900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2d477b57570854263a3987f6ba8cab5a939dfdc8924b315c7240894214b7b2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USZ4V1900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3526a39b9ea132546e31d8736c7238a9549fe94eeed17fcaf46407c415c54a8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2289329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3526a39b9ea132546e31d8736c7238a9549fe94eeed17fcaf46407c415c54a8. 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/CA5KR2289329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da5c1bd7502397e538e9eb5cdbc2271d0f080d8a88e842a6edfd51595a3a645. 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/USAT21804326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59749c67b48ca461ba6a1166dc0724d4d3190564f0e6e2454e39390b718c4514. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USUM72100986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19390e43c68aed28f75bb0783ad06e589b6a2388b24db3495b2f6562efbfebc4. 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/USA2P2400434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef3391998072afd8e966d411d4a1d0c53c65d80c668cb724aee843dc3f40583. 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/CA5KR2316932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601e5f4e7dc2444c8abb657442b78c47e8b3f7be5850225d96e49d6782e32c2c. 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/USAT21704014.