thumb|Makiza in 2005 Makiza was a Chilean hip hop group formed in 1997. The group’s music was known for its political and social criticism, with their lyrics often attacking the military dictatorship
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a9549fba46f426f022968800a09719b89c6900540f0ef8ac4e0706ef0b484c. 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/90c17529-32fc-4cb6-bd00-73d085db5c0e.json and https://artists.proofprofile.net/proofs/artist/90c17529-32fc-4cb6-bd00-73d085db5c0e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4e8bee0f4b89f50cf5d283d1a4a420e38f742305eaa7ff84f43f003c844c24. 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/CLA229900153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f35c50cc6c8dce21efaa8af9f04b542591a87daf227d42bf7566c71fb2173a0. 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/CLA229900154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54879d4c4cd8c37b6e25b45539183f49bc7d1edba526979673bf79a4b86e29bb. 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/CLA229900155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b07886f24cccd0bebe3cabb796aa0f649cbbfc186f8df11f773b0036ea424f. 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/CLA229900156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8c3d5135947715d995169c3e347bde36641a722b72e955e8e5794ec6f2e799. 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/CLA229900157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116533e8d528df0b699045ecb0c9c7cda3654e4c50e2f8e7c281533c67b65508. 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/CLA229900158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf82f47602b9c909256652bde2dccc0c930c9990e9dd8c53b9749677f802f15. 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/CLA229900159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dcc8a630280414d3daffc5fb41fc59845751b6fe8783a954d16e07a1e95024. 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/CLA229900160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84841f26ff4d4ad4c28df46a5b7ed07cf457123059a5318bffc6d51d0805e8bd. 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/CLA229900161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ac208df060b117f285e897938aa80fe9f56222801abc0c3e89790b6f89ad58. 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/CLA229900162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563e8135751c91222496cd02885fd9ad39bc1b3662692b5966df735f52ff9700. 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/CLA229900163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22291fd3d666da79e40d1f11a63c74495bb79921055499a523a319feebd776e. 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/CLA229900164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263e28b2bce7173c3ad41fc0646a135df8e799d760d832b6a997e4062a382861. 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/CLA229900165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f54ed7abf3cea0dd011c753bc11b7743ef6c7abf317b8d159d41b511d36328a. 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/CLA229900166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206c11bc00849dc0e11d88de5cf801deb0b836678f1f4000ad2efc400c593127. 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/CLA229900167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de8be4edb91c5fa35094c539e4519d73c537864f2120db264f498a1752a3bcb. 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/CLA229900168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9404977015b817895488f9d777de7b245ff717bf85b4a0d214f9c5f5633978. 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/CLA229900169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc16353b877e6f4a157f83affac56a2872fbe218ded4e69559a7a6ca10dbeda9. 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/CLA229900170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91600095d7135a978002f2887406d748df8c3fbb01a0b15b9aa01aa76eb280f3. 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/CLA229900171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7565508a06ad7b9d62973d04abb8a69702f330dce5bba8e2615eea8bd74ad01. 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/CLA229900172.