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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf8d14b919e5921a815b34e98fe4512a8009dfdfc7bafde7927d50c4862250f. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b9b74e6-088c-4889-bca0-810c631155a5.json and https://artists.proofprofile.net/proofs/artist/5b9b74e6-088c-4889-bca0-810c631155a5.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cb61e3914309fe42a75cab43e22a348eeb0657a78b9b9f3513689768575a5c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEH742157422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9b9acc42fff51222c80cdb9b6456f6644d424c6af3a971ed82f3aa9a850e6b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US83Z2147837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fad8d6931ff8cfd43d5bd3c3a87475a0cd398d9e45971bcc9ab067706c29769. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US83Z2147843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d002f19f6b8b680df3797384fd0698b54e8ca3d24d4ceed9a8e1303b25d57ba. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/US83Z2147839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a1ccf3ca0b2ad12d7f9dad960d926138b0a6fd6813903a645ac05833d17c55. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US83Z2147827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68be9492fa544a50c42fdbb877e3a14653cd871f5cbd4765d3011406ec985287. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US83Z2147823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99443b1a77f11ad9bdd75a26a017cee63c0c9a464983f6b2dec413f9f376aaca. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US83Z2147844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118db76855ee3ec275effbcef44e7aeff12b328990fb760f673ec4f4aacc954e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2147826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3f9a036b32d677a06d68aa20225961af9f9a806ab1ada629fba498ffcd77a1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US83Z2147842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57baa02ad5a663ac82c80ae6effea5d47a09dd3558cb1730fe7e08c0f3190f30. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/US83Z2147849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d6b0996f98724ae8c0f77c8d3d8608ffa3af1f68e96566376206f144f32650. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US83Z2147828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc193f666dc9feb085e3780ffb79edec956e5deac3c4d5dd4717579786ae1a905. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US83Z2147829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c982debdf41c7ef228469999ebabd425838a8a9394520f9014457a9a912f15c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US83Z2147847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4d42233e553d972b122824e0c65e07772a5b380b8b208cc6d587e0386ed40d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2147822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241d972617614014d38d95ac28c9153899bf11d3ae9222959dff28b982282cc2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US83Z2147825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f85d1d9629cccc0ba25b1d5eeb8d1cd61f2f7f9793106531081849bcf20ce52. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/US83Z2147824.
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 0xba533c9405946b71771759a7ff950338f27f6e3684a439e4a5fb07ad770cf3ae. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US83Z2019852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82d7167f77b1c8446818f3889b534309f432d88b777fe08dc0f4548aae6c046. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US83Z2019848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e28cc01d119959dfa6ef00bb08f50e89152a17bab2a56f17464287a17f3ecc. 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/US83Z2019860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71adfff281bec760c22b17740ebee2bb7a2357ba268f7c22a08037b513a46e29. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2148011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3f9a036b32d677a06d68aa20225961af9f9a806ab1ada629fba498ffcd77a1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2147842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf50e686debdc64dcbd28faabb69eef438132313938050cfc567cacf9aab31e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEH742162867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0819642bc4a882b1207b4c4519f3d81f2d81b93bbd7fdf8746077254de8b6d5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US83Z2028570.