TAS, Tas, tas, or TAs may refer to: Places Tasmania, Australia, an abbreviation Tas-Anna, a rural locality in Neryuktyayinsky 1-y Rural Okrug of Olyokminsky District in the Sakha Republic, Russia Tas
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 0x0cd41677057a13f87bfde9b4d1de2278e8d5321c47fabfdb2aa655b52955c6ab. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f81f72f6-64a2-4b4b-bf09-6fbd0b8c3d7c.json and https://artists.proofprofile.net/proofs/artist/f81f72f6-64a2-4b4b-bf09-6fbd0b8c3d7c.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 0x0a3dab6a3f95f576c015a911eff7009040e876c8d46d0119127aa61205fec930. 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/CZA162454587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b224e084681ae1e379ce4f6d475f2c76a077f66113bd255d7c6a9a3eae6295. 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/CZA162454588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b9fc7fb4c1945412ce269776b98743fe47fd9dc54a5ba500f3d34f97a7c48b. 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/CZA162454589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee113e5b6240cb3aca18a7807fb4c764415c5699b4aea8d08e7d691544b581a2. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/CZA162454590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ddb78996b6077924b95b8e8403fbf39414ba009f8e1e9c2706030a2941e785. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/CZA162550160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cfe2d9d9198199e447d718665ccf510fc35b9ec870d1404a2bcf36460f3bf0. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/CZA162550161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500a94a4af183f04f3eeeccc33932194857a239838ee8d381a43ba17be800ba8. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/CZA162550162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516943252c73c8170b40078083837870053d3453cd4ae48d2003fcbb19637718. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/CZA162550163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd81b9b33386e3e198cee2cf256aa41bc189addf48b833b20cdd56a969fa7dd7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CZA162550164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c24cedd1a8129e295ec0ca295010e35d6e3b4be1e987ecf14a062d94fee7b0b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CZA162553066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a26ce35e2cdb35c3d151f0d45f321cc0347bd785994bcbbd64d0509da6a0af. 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/CZA162553068.