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 0x2d9694203112fdc6f97690b86bfce555097fb6b964a442315f07eaecd9b8fd07. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3e3dc35-e1b4-4401-a236-6f7d6f8e26bb.json and https://artists.proofprofile.net/proofs/artist/d3e3dc35-e1b4-4401-a236-6f7d6f8e26bb.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 0xcc46293301ef2a42e169d7612b631c43a301f39ec4e3863d37507fc7fa241ce3. 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/TCAHB2329877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc420a32b290c7c1e06c1c2c76d1ee8bd3f330f405a1ead2e1aa92a2bf950dc8f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAGL2242464.
I Look Both Ways on a One Way Street (Deluxe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2193f129b4d1bc7b2a19a1cf4cc19e132d42e0af89abef4408fdf43f7e5001. 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/TCAHK2313213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d90dab703774546364f99ed0abd3d47c765e3ecab4ec6aad608f4f97edbc12. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCAHM2330363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2e5f18b4f7d09ba3f0c3ca37fb44e33d316967aff4f382f7fadff045befddf. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/TCAHT2496548.
Old Songs I Think Should Be on Streaming Services
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cdfc8582a74c6853aeb2888c540aa3a5c8a9c4c94bddae740a1f74b80fdd71. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAIA2416018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1ea0e400fa875948142f46324aeca4ef8cca5a833ac9e71610ede30b734400. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/TCAIA2416022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4f438d20223ed05eaed14128ef8385f1bc4bd8e298e0f88817f66f55d9b36e. 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/TCAIJ2499577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7866f7da888f95241c965a8424cfcebb4803105d67999f7c4bb62507691478b2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAIT2492097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84260da29cf94088493b9dbec4afb9292425e0f99c50619241bd505313f0631. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIV2438475.
The Imfamous 99-Track Sound of the Dinkmaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cb438a10f28ac3292111c3be9c380275aa706285a1d7b6723d486c1a7b1a27. 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/TCAIZ2413419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e296f0ee300f7ae33e68a0630cbe1b16aaa67a33c70f8fc6c2b15362a761072. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/TCAIZ2413445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f36ba0f75e40200829e327398ca0cc7025985b0bae8542a750353102e5dd593. 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/TCAJC2403289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1204f8e183fb81b2f94ab8f93482723396c5617d069bec92ae83a6d4843e4b4a. 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/TCAJH2569771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de2dd5a8ce7a21531331a415a4a38e56ca497ebd9b1797a1c02281805f31d2e. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/TCAJS2532857.