Black Shadow may refer to: Sombra Negra, (Spanish for "Black Shadow") a vigilante group in El Salvador Vincent Black Shadow, a British motorcycle produced from 1948 to 1955 Black Shadow (Wild Cards),
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 0x0ed650473103b723ea5fcca220c22b7076f631c579bcc771aaa74c503a91e6f9. 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/bb5022a4-0d94-40ab-bca2-cdfdde4f51ee.json and https://artists.proofprofile.net/proofs/artist/bb5022a4-0d94-40ab-bca2-cdfdde4f51ee.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 0x9b8cc21f66b4be04d657a06b153a2071283a1ab675a5c90f48326ddc0d9d3956. 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/QZNJW2419283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acf0474e582c88722095ceea7aaa4a79ecf84a83981d0423771bd9397b8d274. 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/QZWV32335433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931632d0d10b2da2d11ffb5106dd3c22f7783f737ace76302aa4506f475100d4. 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/QZNJY2388358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44b976ecc1a3fe8d0f1721dc05ddd12a7e64706e94dd72c50367e37fe175723. 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/QZNJY2343160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014704235fd48a42438a080ee9c3f474eb16a6c7b73ea31aff40c3e86f331f20. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZNJY2343161.
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 0xf6035ff977864dc621e3ccef1db05a42416cae470821576103c4201833ad31c9. 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/QZGLM2304402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b222116dd7cfc467de4c2dd7b320cca2008b85b06b660b61eb042df0135ed4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZGLM2304403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164f4fe59c736ae739ce9390af39e48e02c147f21a469a4d424b6b908907ac87. 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/US7VG2354244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b2dc867924f867ad5044213a0d7752c36f37ace51fa3cbed9d45b7ced09632. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG2354245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa373d00a18ce827dca8788b1250735311f9c8f2a8df2c0d2de3d30a288a17a79. 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/QMA451400175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfdf432be65be3feda20dc51978e993e52517b4e5bd6c7a2cb288b03045b451. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QMA451400176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d6c05989f9bafa68838665b05b830327b5ce5569f969fe1d7f8a15eab07b70. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMA451400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abc9d863c62b17f811a0b88ed523511215025f6e7901ed17828d07dcf42afe1. 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/QMA451400174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26c66c7383f4341da72726d6e9fa1b8b6a4029d83dd2618da4c78d488f4c8ba. 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/QMA451400165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26a0b89af3c24e04e8d1de9518eba754491f4568c8dd46f03d45ee5ac373b83. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QMA451400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f03e961804b12f171256724bbf096393c41b53559da5abfdb5990389022ebba. 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/QMA451400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7a21cb803f1bbec03d5faa6dbd3b2f926f305dcab73627ef72225fc2d02035. 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/QMA451400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae698f13125e83b939cd8dd8d9b0a64625d5c821528c48bef1737de576023d80. 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/QMA451400159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09eb505c83cef0379ed787cb9f3be3f2043a701100035abc5323581db51658fa. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QMA451400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39efeeb4c5ac554c74ca4108a6f28553db627e06685232be4db03ed7102ed32d. 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/QMA451400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c41f647ef986c20dfa9dfa9eef787b7a7035100514f4fea64059aa90882d52. 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/QMA451400156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa6c6ea2dce41d60ca74c076eb9f455e6f417b6b05135aef27cb6168685cbfc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMA451400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76584ba0b47de2f3d36de33591dec8196fca93f0c0fba50d6f7a5ae6c5322b46. 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/QMA451400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef22b4273614ab30fb66c52469daf79c9d8d571232ed1186c4b4ff733eba44b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMA451400134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3168da48bd4426d8983cf63ee458e4dad08c53d5ef02de268a9ad8a08e268549. 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/QMA451400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e2de31d528c19803c2885c3157a7e1f89591333c53de79c4ab15e3c40fd278. 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/QMA451400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3180e08dea547ff183b09489b085a4be40304ea7e9e857815c19a83bb89ca690. 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/QMA451400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5465451c24f65b50504d5278a5b5b210c5388b0baab864c126f7cdb17021d32e. 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/QMA451400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54af217ee3420d046b004bbad14d04406bef0b2cb26f0bc4a2cab50660321d15. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMA451400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012d4136ddcb0159008dc26d3e9b2eb6d9b69263be76318f1e5fdbdad89f2646. 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/QMA451400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2c77c7c1cce9e4851dad0c0e97c472923bc21b0635483c24847c72f90d18b1. 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/QMA451400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87259f4075719e332fce519df3d9c1972931c97aab9a7fa935ab506fd3601ce. 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/QMA451400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc92efef247b55bd379acd4fd749d89e65bb8ed865fceccac66823bfcbe3d869. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:23:39Z), 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/QMA451400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f59bde82bee8f1c463b626b259fcd8da8aff8b61aaf112c3ba63a98750dd09. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMA451400081.