Grein may refer to: People Alice Augusta Grein née Graveen (1874−1944), English actress, playwright and theatre producer, wife of Jakob Jakob Thomas Grein (1862–1935), Dutch theatre impresario and
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 0x07db0f82ecf8acbfaee67ab7d060effaf1e4b4a17fadb4802bd3deee443e349a. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0440d05e-c301-44f3-8cd1-42cdf20b7e05.json and https://artists.proofprofile.net/proofs/artist/0440d05e-c301-44f3-8cd1-42cdf20b7e05.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Osg18 (feat. The Line Punch, Devil A, Keira)
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 0x484cdedea8ac42fd5006eca6b3c20265af8c4f756c4885e53d4e2c1d58da9497. 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/IT1O71800418.
Zig Zag (From the Netflix Rap Show “Nuova Scena”)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2dbafc432fdd8c0eac2dd64498a845439fcec45f23c2194b64c107b47b2d71. 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/ITUEK2400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1c8c19d56d65fc2205818a49edf23924462473011da205114d7e738c947149. 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/ITUEK2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77616b2dcf534c278254125772aae7b16e79685c18a1154ba1ae998dea41d73. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ITUEK2400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bb27ae9dc2c5bfa8899820bb575dbf93ab9ce2bf375a367c859f4a04857363. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/ITUEK2400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2dbafc432fdd8c0eac2dd64498a845439fcec45f23c2194b64c107b47b2d71. 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/ITUEK2400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86745957279d75428ca9893d416ad4d548b220ebbf2e361d38168c732021c89. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ITUEK2400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b803e76f0c5640317470753317950102aa8ca1e075b40876e995af4991c7234. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ITUEK2400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03598ede32d6986a6fe7fb678402c5bc7d51b46435c422f39a1ddebe4ec480c5. 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/QM4TX2570830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3a1cd9ead380d5da26a57f2805e6cd7f742c732d8e3ee5e5a9d4ea436610c5. 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/QM6N22517332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65e24f685071df85b13b19d5987bbc0e277e438924d15a245c4a51a66dfebe6. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QM7282579745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135bd9f0394686e217d068bf449115206455c7726ae69682d42a35b7240e97bf. 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/ITUEK2400030.