T2, T-2, T 2, T2 or T2 may refer to: Computing Apple T2, a SoC from Apple for security and hardware management within Intel based Macs Palm Tungsten T2, a Palm OS-based personal digital assistant
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 0x914db87bad30ffd64fd4bb279b9df17402a270ce8329a1cfa40f90879a7180bc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca3e3edc-efe7-4311-8f3f-4015b1f5c35d.json and https://artists.proofprofile.net/proofs/artist/ca3e3edc-efe7-4311-8f3f-4015b1f5c35d.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 0x68438211601b1f850038fa159ca07c2ff9f1c271214f4219dd83ef2f2fac4c55. 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/TCADR1800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5d0cc1178e9be014ea268b45ede12bfb7483507478962808a78f83cd0e9443. 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/TCADR1800080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148f195c9ebfb3a9fd304ae70ecb40a8a72f0cb5eaa49779ef6c6fe92936c458. 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/TCADR1800084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86a26d7ddba9ccfabeb0adf15a00c3c2a687240e80afc5a913d0638675e3047. 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/TCADR1800099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7e8e34d67575c48444925c378d838229e9e2f160a55a7b2b3e0ed420308ddf. 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/TCADR1800150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fb1f9a2791b4701ed67f3fc083cc8529304c9f825d25b3b207be4790ed8733. 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/TCADR1800293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd428cc48a1cdafec2e184e3c3ffd748bdedebdeae5f0ffbc738acda8f257a231. 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/TCADR1800975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b0bd587fe72dbeb9015b7bf4dda6bb8dce98573eab8a43cf1da959c680e3bd. 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/TCADR1800985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989f54d8f20363d090bb212c03be6ed0abb0be91a8bf429835942d93c97019cb. 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/TCADR1801010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580da817ba31bcdd1029a327c885dec32318bd51c8e56ed40df3fe28321a00d3. 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/TCADR1801036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d344579a991d57aafd67359254cb32264464f0892b86a78a98ac06177c33b48. 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/TCADR1801039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1443bce3d497672ec95cec90c5e93efd5b5c9a7a8c65367c6257a493cd9cb559. 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/TCADR1801050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f9722cab2499ae376a75442b62b6d12ec056dfce3c3c73feec1f24c6cac7ae. 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/TCADR1801058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59872c6850f343035f372f730867a77a0eb741273dfd10cdff7b86005fd985d2. 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/TCADR1801062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5981c29d7915f477a481780325a17560131b34bb02b5d443df922c4fb3b6f9. 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/TCADR1801068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5654129916c8eb7fc2429d62922d84f53f6253e3944dfe5877c1904c7ef4e9. 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/TCADR1801085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765254b45bd53a5bd2d4d50386d69c8273cf22e3ec1433e73dfb816f9b5bc59d. 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/TCADR1801101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7f65729c6d83abc905034fd5ee0c87ac244b62f8805e1e728d34efc79f449f. 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/TCADR1801119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6203176ee9fb3d1b00269d5964746287f1b00eb0b5634f9f9a94bb78547366. 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/TCADR1801123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98edbd4315739cfce5c6f57b80f5a548f45178fb2be174e0aaf9a4d3588900f. 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/TCADR1801134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d910b4f0c0fae3d58ba9366f0c075c4ab45d773f10e5365193520e3aa167e6. 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/TCADR1801137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2bc14a70c55d9461858a5ae968d4e8a13a69827a4d7976241b7c6601ca8552. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCADR1801143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6ff290985c25988eb07e7035490396cb6e1511f3b21fa278e31a7073dcfdce. 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/TCADR1801148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5416571b4fedcf7e225584fae55e4d7a9ebdaef05d6793c59fda5d9ea66353. 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/TCADR1801150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1540f897f93bf26e1c8ef713b9308cb5f2cc281573b04e887eae859d324ebced. 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/TCADR1801156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1e818603e6c90657ca861e73f33f9e6b3f9c62a5f2973f1a387d253068415e. 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/TCADR1801187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998b99fa0f8ac5dade359aa7ee2a49a253585297ad43bde0987e4a8d53a455ec. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCADR1802421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1007451bdaf52051f31bb1bd5661bd582ef9b23303a7adbd24ad9b088e8993a. 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/TCADR1805605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c32dd099aeec906fe45bfa69d05d08837ce246b31908cb6153adfe8c54c97c. 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/USQY50916454.