Black bear or Blackbear may refer to: Animals American black bear (Ursus americanus), a North American bear species Asian black bear (Ursus thibetanus), an Asian bear species Arts and entertainmen
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 0xfb1998a37a362d25dec3f8d34373b558f7c4fad7fffd825ae2344c5e4d716782. 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/cd7379a4-110c-4a6a-bf39-30f2273756f0.json and https://artists.proofprofile.net/proofs/artist/cd7379a4-110c-4a6a-bf39-30f2273756f0.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 0x9b3176d7fc22c91102617e3eb948f6f600b358aa05b5527a85151c55bb3795b1. 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/CAD001300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067a0761ee1ac6ec8e5da82014814425c3c1b5f4806a7176735a52a38de322f8. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/CAD001300099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3e3461ec572c9b32443935774995399a0d2b3787bd005b42e500dd8f371a1e. 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/CADO01600256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bf350743ef1443680dba628e482b787e8e376e6ae6be21444b33bc7fb1bf37. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/CADO01600259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd132bcd172b5622cd495e565d85b65e8217e2b3b58459defd016b160d6f578. 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/CADO01600261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba10def78618f299f150dba63a948c726ee8a5091c6a0f9fde29b4a80c47395. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CADO01600262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92df14f1d101b35675aa7a09674b70d17c3db6697f2a4d9918613f06638fe93c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/CADO01600267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080b0dd59228fbca24fb2ee5319966cfd550a9330d838938bc8764377f79c4c1. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CADO02400256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f94eaede4769bdf4c2d4a51331888c09e4fcd2fd65c69209ade64987e4be9b6. 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/CADO02400257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf895f50b0355264da2a703119fdb812a1a38be6c0098af2882c183f4873980. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/CADO02400259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe2641b0c3988a76dc93dd24a920f7094e77df56f3eec567aed3ee2a6b4deae. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CADO02400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537f3115b8b2b82d3f80b2051677462b576d41c55fcf4cc82ece09f4b04cfd3a. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/CADO02400264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808cdb760bc7190637eba107a63daef911d890d7bf848e84bc6532000e48d11b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CADO02400266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed6c8191581ad4f0a36dd568855fbc5a8bff96fc26ff691f2ce08c7139be7af. 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/CADO02400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404a29cba825a34b978bfdfc892662b889b51cb74df8ae464e7308de281dbeba. 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/CAVP11500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa915d8aca3f2a129a837a8dfaa001f8e941f23a779ee7f3c54f1be33ee84dc5d. 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/CAVP11500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404a29cba825a34b978bfdfc892662b889b51cb74df8ae464e7308de281dbeba. 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/CAVP11500015.