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 0xdd156d052dcaacbb982fde506cfb421aa518f8840146573c81ff0be998bb56b9. 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/fb27be30-2cfc-4a22-bdaa-85cb8247f505.json and https://artists.proofprofile.net/proofs/artist/fb27be30-2cfc-4a22-bdaa-85cb8247f505.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 0x24aa50dd5adccd7062522658c0b18f9f25cc0668ba3430ff744ffab076fa2146. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAGL2208086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5006c3cfa980bddccb99035ce356d7f0e666b122da250ad11f277220b95a41e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCAGL2223213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04b22d1dd4f7a928989308dc31d1cc766f8b24ecd192693bc1433f2a76d0fc5. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAGM2280623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3d7bb4b12736f2a731f05188fc409a38b980376ef514686615b0c8c9ca1c00. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAGO2295144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd351f20744caed640cdedf0cdbfa66d4f6e725856d648750df312fa77943cd0b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAGQ2283111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4026da09a5970708efe21e89a2c0a28a105de6b9a064056b87a1222573f1658f. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAGQ2283114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c3a29d889554d420433a52cd35518c19f65b765d96f289c795411b3526bbfb. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCAGQ2283118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40144ff748559783031598853160506469189c488319a0dfad9dc43227269ea. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/TCAGQ2283121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab05237c327259e3d9b5d49e2359c5408784ae28f78eabcb1e740f6b66fb5ee9. 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/TCAGQ2283124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3ba1798d201a17d1fd14859c9aa2e0adfa2f32f37d88fa12f3bc44bdcd5aff. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCAGQ2283125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0175f8ffa2de02c412cc68d4da1b16bd0d8cd2f40ad63878acbf590b6147b066. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCAGQ2283128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4595ab962a4e9088ceaabce200b86a97c45286a409ec21d19a255940c499dcf6. 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/TCAGY2368240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb966f105b3144db60166bf955779ea0239f752ae34eb575b76a1c76de9b657fc. 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/TCAGZ2366724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a000bab5be735c399df5a065a693695eeea936dc917a65e3987d0fd8a4f2db3. 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/TCAHA2325598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe592fcc537c87524f498d93ec34fa1a8d3d404c224cfc6fbb46ad47262409d43. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCAHC2338783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88834ede4f5bf591d7f28a64f6bd6c8232637a4f4aeb7f915bbb9f02669d5876. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAHC2338786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b10ab9d671bdd3625b10a20c498d562ecb4054878ffe041c265d64be23e55b8. 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/TCAHC2338789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7550a246039821639e79d88657da6ece2b917c53d7abe79db2bab036340a3d81. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/TCAHD2325306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33aa8aafec5f57480cd6a29a4748e9118769fcc0a8bfa1506731a5ddf7061235. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAHC2338797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e9571543c9fff395fc213b41f3af216368cf302a033fcc36bb72222d4d118d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAHC2338799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f8f81bfcb0ea000262671ccf30c7d97663f20b21e45135f209d3f63c904bf4. 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/TCAHC2338801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e67be0eb041375d953b093bca8f02b1272c22d4bc09a0a58927cf1eed8d15da. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/TCAHC2338802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320b2966d2fd130de85430348d35081ed28f22ea78fa1c893924aac83f7e156a. 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/TCAHL2310644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb17746f83af0f3157f2bc19eb58830867d81a218b1b7a3d580542f38ca004b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAHL2394804.