Hema may refer to: Hemā (mythology), a figure from Polynesian mythology HEMA (store), a Dutch chain of stores Hema (supermarket) (盒马), a supermarket chain in China Hema maps, an Australian map pu
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 0x94d0a34a8467af7f9336569f4dd255ece14e1546972817139798e55642cf71d8. 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/e2b0d95a-0bec-4000-9cfb-3f70201451cc.json and https://artists.proofprofile.net/proofs/artist/e2b0d95a-0bec-4000-9cfb-3f70201451cc.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 0xb90b88d2931ad26d7f7227905d8da99590fcdc1fb4627484a27bfb487c6b4a55. 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/SE4RG2307014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a26ab75408af6953b7bb39a7c6e636a5a8253f8e60eca47c02e629f36e991ac. 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/SE4RG2300524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf582731356bcab38b26683c92fed14fa08903b247d806da3daa549089fdf5b23. 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/SE6RB2204329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0e47b66eb867d823eea6bbefc25ce7fb559ac67db2fa83dc04ef1833718134. 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/SE6RB2204330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91db049738c0a6eaf5f44a6932ef5311262a919a378a67be5df3eda76f6c9ba. 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/SE6RB2203951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41c7ac035719f2cb6d1524c7b9c74e92cd3f22cfad6f5ad79f788a97d6bab83. 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/SE6RB2203952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7683f46bdc005fcfa0d3ceda641c924759a8dfee6a01e5865bad3e778b6ce1bc. 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/SE6RB2203953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca65f5515e3d7b8f442a1678c7d18bce3e78a04fe7429e14c2c9f30a87309d4c. 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/SE6RB2200393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2449dd31de6028c88a13a36c03278d108e06112482fa0463dc918f79ecbd5f77. 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/INM3I2405162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4b9fc70e8ec7e2b60e67e56aac8749e7f965c90256055f8d2401c759c4bc2c. 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/INM3I2405163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bbe8d1b248c7dd161c5332170609b5f6b64048a80fd5575e2457cc397f010b. 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/INM3I2405164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe7ec281c33180c3f8d7ee45053b2ae26c594243ff265ebc63d93db279f11da. 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/INM3I2405165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a0e0c0e0922cbefa102f950619b11baf6cfe496cc129098e0195be0d12957c. 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/INM3I2405166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5547c448f3990c679bdbf2db73d94540c4ce51a5e465a776fdcc8f3c5a6e964. 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/INM3I2405167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314645b272f15d1e54e65f69d32f329c1620c20b703c1b2a6db4f74189bfc82f. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/INM3I2405168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564e014ecc8638e4ec195d422c400578bb9f6fe70d8f5c4ba7da5b766eccaa64. 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/INM3I2405170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6497452802638b6e52a235ea65ec42fb0037397949b5325193d11c01e1c5b94c. 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/INM3I2405285.