Endo may refer to: Endo (band), an American nu-metal band Endō, a Japanese surname Endo contractualization, a term for short-term employment in the Philippines Endo International, a company specia
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 0xd2bc15d3e11cdfab5db6e99a04e6771d54ea3809242ab9ba56f608dff2a9aed6. 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/8a03fe15-9a5a-47ae-b96d-452617e995b7.json and https://artists.proofprofile.net/proofs/artist/8a03fe15-9a5a-47ae-b96d-452617e995b7.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 0x568df5039f61b94a124e189750e35646c2c9a92484979202fae0e040371acc59. 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/QM6N21957075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa723f05dc7ec1480e8eb7bfc955043caaebd072cb5e3abcaa8a64e58fd4b134f. 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/USA2P1893847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dc263754dd06bc18f8db74022ff296e78a368e514a466eb7677ad8e4e72673. 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/USA2P1883226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00820701e263139a67108ebf76e11409eeb377285fcc9df02b7d1d54636f703. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZ5FN1989485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d536cfa68489052d02e54c84b0388b1a26b58dfa082ed3f2a8ef64cae68387b. 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/USLZJ1949319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2decc8e560fa17361b7ce490262ef716a3e628860d7dde0aa86583b1e6f5a0cd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USLZJ1949311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01c7612e1700ece92091669a36136a2845710b852427e2f1a13b1a75455b7e3. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TCAHH2357318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91b5b3868fd31bcf5aa2be0c0484219c90ed584ad796b162f1cf2710262d30a. 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/QM6MZ2276650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d6c92e7572095993cd090d5da8793fda729c7d8f81d962044ba295dc702c6f. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZDA82247021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ed7d74c0b8719e94917860ee3615970fb74a941ad247873b6cd91c56fa58e8. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZTAU2114521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf3051a2916e0054ae79a26bfff0460afa9c709fb950153b6198c88b0d61c6d. 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/USLZJ1993215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e63093d36314552ce73b5a41450254746c1609a9e305ee227775c4d901b0ae9. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZHZ31942489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0b263b18a7cf4ab1fda6fe505462f6886212e24640816e8c8ad73ae25a6dd7. 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/USLZJ1950663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43bdaa1e7d944bb9db2034c2c1982a8bc200dda368678238c0690223a8e2cec. 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/USLZJ1950435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ce6a499a9a3c59a10ccbb2ef3fb55909128f0525593deb78b282de8f667fc0. 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/US7VG1902480.