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 0x5c1757bcd4ec13ff8aad9566f8b633cc78de7c5d3af734c1c521cadf131b7ec9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17f7036d-3762-4686-98af-74211fe4eb2b.json and https://artists.proofprofile.net/proofs/artist/17f7036d-3762-4686-98af-74211fe4eb2b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zîlan Derman Govendî (Kurdish Folk Music)
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 0x34a5110cedc598a4e5b736b3d4ce0717a561b652d73f42cfc5bf07bdf930b380. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TRAAU1100157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1363f847e1f841e0acea8bc2b14c666625703e4132fa23086c82641dfee4e540. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/TRAAU1100158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2daa3fb9a3ac7149c7f5df0c5897e9dfe2718ed206b9406efe93d287552948ab. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TRAAU1100161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224153e142e9f9e1740efaab05570ed6cd1ece90e31d9be5f40aa338e535f940. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TRAAU1100163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef32558841a95117daec3dac829d2440cf10b49fadbaea87747d15f25e605bb. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/TRAAU1100166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33f655250d628581786890d4ac1e48bb379db5fecb652a429eb58332dba2f37. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/TRAAU1100167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe276f54a8bd62a882dc6bd7da3944fb3defa44fed3610575062e5b5ec2ea2965. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TRAAU1100168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2e1445a2e0905c3578badaf38e45d4e19e21b6660df57db088599e9b0ab680. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/TRAAU1100169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee031d8705a5093a319097ad26ee92dd4b61a5ab921599d6a28523beda2b332b. 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/TRAAU1100172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29619f9e29d2e61fc8b94ae05ca79d12a095c7104bd0b6c4fcc2ae8d5a9aa07. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/TRAAU1100136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4aa0d21d200c15b4781030f39ed133d767ddcf92af69c183c92b8aa2d1ef50. 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/TR1750600106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4ebc78feb9e224c1b0a4dbd5c213a401c22ba80cf39e66a292801217dea7fd. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/TR1750600095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fc2ee4e404952af7b2e82e3c265fe8155e9dd81ac81dc803591d1b1ca18580. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TR1750600100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ca6be130afcc1863c940fd6537af2db1a48d51c7b8ba63d0283f38ac407ecf. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TR1750600169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17486a726678ed6879f358a65d7c28e6785ca4f61a818b4aa411f2132079d41. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TR1750600170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8c712152a88c5da13bccd85035b43eac33e3fb7fc1738f89b9b752450db748. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TR1750600176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0a598b9f218711534dae3f0def31ff76a26f595c3f25f0773b8d9d20c06c82. 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/TR1750601537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfa2535823603e6a4d0373d19cacb0219e6a28fc9592111c9ee34f4d17f7ec3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6N21816255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48cb2ade1e45612ae54970223dcf670aeafe290b264ce5fcc4e85566319316b. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TR1750601525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5780c90a8b3413bc2d097df0adf0f3c37b4225b1d9139743558635efc25b2161. 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/TR1750600114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1a8980dd5f2b1f6885d7944d7133923a95ee814f3184c9517fe8fb19a77709. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DGA082410856.