2K or 2-K may refer to: Numerical 2000 (number) 2000, a year Video and images 2K resolution, a digital film resolution, display resolution, of 2048 horizontal pixels of data JPEG 2K, see JPEG 20
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 0x17fe6ce35bb2a35bcef1e1c34baeae9138d92474e43ebf509fc1112fde6bde54. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a855363-70eb-4c2a-bf15-0b79f06894f4.json and https://artists.proofprofile.net/proofs/artist/6a855363-70eb-4c2a-bf15-0b79f06894f4.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 0xfee519c4ced4b3cc9ff5c06562b71eddae18a28fd78d1b9c52ae1436c3f67175. 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/PLUM72400439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5794fd55e3f217c8cca7c1a8ea59c9f9b1d448960c114ae71dbf29cd8a852ebb. 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/PLUM72400432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24221da5c704376343249f0da6cc00c392ac78d497356ae88ccbd84faa5bd7ac. 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/PLUM72300276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77095ab73422e60004804db733da1e4f9450e9a2f00982562d2c43bbb350814b. 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/PLUM72400343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9611079e4c90aadb8dc907a6c34620609c1d8a05bf97f6760b50eb6c49e4e81. 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/PLUM72400344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a48807f3182fe17b9f8cb83658b17f8acf224cc5f5ae980078c3c6c46379aee. 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/PLUM72400320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3b853466bee2757b36d2fb43f26b596bfec0f1a27996b71297dcad48081b42. 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/PLUM72400434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314d58ea2cfaf695893591779af682411a215e57cd654c1fee8c4f5e339e5997. 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/PLUM72400264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f05d623164f1c9c6e9832388f82f08e5e1697e92c1e58ad2786bd765c1cb09. 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/PLUM72400435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ab118d9b7e4749016d97568b011848e9270ee3c337614f8bb6e772c18dfbbe. 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/PLUM72400437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6be2026429ae72d36d034ef15f8416db3ebe68f5ddacb21e282630862e1c44. 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/PLUM72400438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9153b31f2c2e2d5e7b3e4bdf7e4cb7b7be74acd079e31418176e9885849c02. 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/PLUM72400244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa1d62802f5068aaa57ea2a9161bbe9d3bdeb6df7b80ed7a744bbd2106b5965. 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/PLUM72000566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0552765affeacd5da82237025861babbec50ccec92ea09bdcc0a66f6af5d1570. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PLT612250010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6e19e2c6c7a3ea391276075e816d1b3585bde2e753b0dfd04f8984e4b33e5c. 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/PLUM72100516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace323a038e01a984d2deb1fe578ba6f219b634ea603100aa343be83079a2882. 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/PLC062117856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cdf2e6f0416a5556498d95ef9ba9b993826111f5200dcbc9d2de6e6208adf0. 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/PLI360992690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f094e48e7861f4234c1d7d265c94bc84a1b84616fe4c51f26f53d6685ea41db. 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/PLI360992770.