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 0x5925b90afbe29689aa5fb6d86d31dd2599aaea1c1c2dd9842781f6fad41df7a8. 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/8e1759ee-bbdc-4ede-a8f8-a8145cadfdce.json and https://artists.proofprofile.net/proofs/artist/8e1759ee-bbdc-4ede-a8f8-a8145cadfdce.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 0x2761e6117ce1f2ef7deae03e95b2f53f756249d7a86d2aca83427e8c59171743. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QM6MZ2043786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1924b2111fc3d7d23a8dd0d39338d4df57c40e38aa94059064839684ac85557. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMBZ92054512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9d9edd7b7ff47ad33b32a06882126786f9898587dfcd1de9f14dc9b70d2d39. 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/FR26V2042485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83577760feeb3aca8a6b884c1b81f2ffbf9f14b6523efc301c5644538d20ed5f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QM4TX2178359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d5cab72803f5410664f12155613dc18fce4aa544927a94ef5880b79c9c6725. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QM6MZ2194927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29cf0cd2f13778c5647da0a764253f94af044a8119441a36a99b50352fc0206. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR59R2268690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66bba993f2f52165da2b4d3883845f2ea6e3df8cdd6939d8d39c0eb6ff4a1a8. 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/RUB632200882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ccaaba5a194968ba98879decfb4d6c641832301dcd3b4b0ca7641e46479765. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/RUB632200884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5495144b91fdd0d225b84b2431552a35cb97809dd2353330b13f6bcc18f78cf9. 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/RUB632200864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18c7275f9e4ba2c6563044a609a9531798ae8951c0eb74fcb8ac29086784297. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/RUB632200898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706d7c8a4b8c93ae6edbfee01a4e87d274f0f852c8a8d07d774b59724797b874. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/RUB632200901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fc5ca07326800a80e280d89834096075d99dc20bfc260c6713208cacb12d72. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RUB632300921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aef72290a775d0559e241db638adf31e233022958a3158f8763dc2114a9013f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/RUB632300944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda37ac30b61a7f16ececfacf408f339723d6dc64ee801e5229b09140348522cc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/RUB632300955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5777741de270953eaf48c987a79382e270374b14ad501c11946db31b42a0a874. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/RUB632400970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fab962103daa391439a97486cb4b30dbeb820351317af2bb3d95825806472c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/RUB632400971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e3492519d66afb9744c9d360e0949682e9ee3256d38d37bde4bc8864202d9e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/RUB632400977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2484ef35b1c8c75f26457b6771e3c693f137e6d60205bfcbb241739cc6f4b9e4. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/RUB632400986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb2d1417e47bd0a955a7bef0dc155da1ab8693ef554d629ba4a20162570d389. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/RUB632401000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b4d23345e5257fd47d1aad1f03e27c2caec146552927647ade560921383128. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/RUB632501016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201be49b41ce8735bbd2c8db04183c3916fcfc9379bf32b9bc7df286ad6cd853. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR96X2225978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98eedea4f943d3e78f47f9f1bb464ff07135b9e8d4420e27615df338644b42a3. 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/FR2X42111010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98eedea4f943d3e78f47f9f1bb464ff07135b9e8d4420e27615df338644b42a3. 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/FR2X42111010.