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 0x2b265ebbb0e09f119b6040c5075cdcc2bd3e127f43316473535f5b5755fc10dc. 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/83492b4d-5e8e-4052-a46e-b48198cf5a6c.json and https://artists.proofprofile.net/proofs/artist/83492b4d-5e8e-4052-a46e-b48198cf5a6c.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 0xed114f7f073444f0aa7af7987af780677bbce8ded11bb41de337820c2e8e3183. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/GX3ED2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d95dbdec14afe5a73764896bad766f2b699d130f5728aa1d30e793f9cc8b473. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR10S2405067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafccd7bb9d76ed4f23c5afb50c501a754948faa459c85bbd188658dfd5cc6265. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/FR2X42459433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f39a7ead7c1f997d07e3dea5615c96369508a7ad441ba4308692ca3360e401d. 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/FR2X42461937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828b14ecf6f5c95e3b75b6c6ecca5a3bbd3a5a1c16013648cc699201f93f290c. 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/UKJ8H2403142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348f8e034c523aee77f3245a417210564d650a6aaaa2b8dcaf976c4266aba51b. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FRX282461192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe060b57796436cbf3b533f70f653f7fcb095f449e883e65216ad3bbad265ba7e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/FRX202545834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4feb41959dcb8543cba9b1fb8d523ccee3e06536e44e6c0003495e1da7f38cc5. 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/GX3ED2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc548a29eeab6d84f10fb2eb71ce069b5b84c7f11e434a7c72f47e455487a233e. 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/USA2P2423351.
DESI TRILL Presents...Brown is Everywhere
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc548a29eeab6d84f10fb2eb71ce069b5b84c7f11e434a7c72f47e455487a233e. 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/USA2P2423351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd0b8ce3e6d9019d8d07859ad0a2587987daa618562d741c15c432a1f073b09. 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/QZRP52460866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da029706df4a20acd27664f776ef027c2ff2189c1ce39f29c46489b1201e844. 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/QZRP52460867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095d6d0664480305d88fd628a2ca1182baf5ea33bd5b15f08b40c84bccf3a7e3. 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/QZRP52460868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083398dcc43f09cca25093394af3a3e3beeeb103529e5cc4055a4642a0962051. 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/QZRP52460869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c46a6cf9ef60656416b29f1960522e1a19b23d6136fbae701694eaacab38e97. 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/QZRP52460870.