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 0xc4ced975aba83a68be3ef0d7e0b300ee50edfd57e1d09910ebde18363e39eb0a. 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/7b518fbb-2215-4c74-bbec-9ed04934c58e.json and https://artists.proofprofile.net/proofs/artist/7b518fbb-2215-4c74-bbec-9ed04934c58e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Howrah Bridge (Original Motion Picture Soundtrack)
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 0x8a4b1385d859dfc4fce789fc1a55e884139844691f269f1c30e06ef4480b8b91. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INA091615315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1098027154baba2b36c10ef3e97f47f1edabf72fb8a99cbee8258ff9e4ca7f05. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INA091615316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3435476bd1444b2aa562e7687f745ccf2eb488aaf1afd8990a8c483781543d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INA091615317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5eb334dc31328d79a5e2e4751988aa2bb77fa45034a6b6139bd74930a2e25f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INA091615318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c69aa03e7dbd5c510bb080b86de3fc15f1bac25ccc86b536d5466d67d27433d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INA091916617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b817a7b279738755b4665617984689398ae0741c09b1b4f4715bb635138bc2b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INA091916723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c974b579c9dca26c8fc9f6d2f14c10855d73b0a169e3dcf06da993a7be1feec. 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/INA092016768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6e8b2157b5e2e7fea591d78b50bedd0480a70b6e00ea496fc841805627cfb8. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/INA092016772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fd3320593eddaab8b255bb932d152ec4655febb74f45fbac550ca14493db17. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/INA092016791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b35c97d4b0c949c85a4f46e6ac781b06ba149fa78b0545baa22deee24d9012. 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/INA092016792.
Naandhi (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5c36ac62ca568327a2ceb9cf76d5cd1a217206b75eb55321c9e550463958ac. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/INM6G2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddfae29363ca6aa63963c57e91451f90ce538642e40f06963bcbda0f802919f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/INM6G2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d81e7f28eb9ac57afab90669f7f7168ad10caaad2c4df99218ad1001326a1c. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/INM6G2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5c36ac62ca568327a2ceb9cf76d5cd1a217206b75eb55321c9e550463958ac. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/INM6G2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d769c2b19af4a4f12a3265ebb08100f1b0e7f09a2a3caf820493044baea897. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/INA092419548.