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 0x278f6f11163338e11d576fd31e1e0f0bf43dd1227625b38d0ebd9d9df0413687. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93ac5603-8035-4c63-83ce-7377fe7010e0.json and https://artists.proofprofile.net/proofs/artist/93ac5603-8035-4c63-83ce-7377fe7010e0.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 0x66dc0a6e4fd62e3c91a183d272b84d4b4f4d32313ef8d0675e1615de6270d0eb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IL1040600401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb588fdb02d0cc97348def163202ee7ac4d9df910f65dbdbe39b5e85910f830. 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/IL1040600402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084279db7a990670be2841643122044677c241ec685d5e69ad12e4db580d4c93. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/IL1040600403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd29164f6e2e57db66121f6328a66d6a6696e877b281d6bc1df2b6634961415a. 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/IL1040600404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ba28fc761622d82b299310e592c8567889c6b4994f25941d923013749a8963. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/IL1040600405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2b7d448ae6243d4a12a731999cd5b812bc686a000b32d51145ed43e82d89b4. 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/IL1040600407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2111947a82213066cc6fdf320f6348273c0be0e5491b928e5ab9f2bfb48104e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/IL1040600408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3edf25757e7ebc831417bcdf0974974721e9514aff09922a73122be8580268. 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/IL1040600409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80d9e5c7b55a0b3b7810c9a1b3d9d648286c99d1e659156cbb0b5a697559d60. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IL1040600410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97fc9eea4684084255813e72f18b041dd42337c8bab3be2870605ec2f006dfa. 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/IL1040600411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6d7b47c262564718300ab8deec22df76bc6c85fe5518abe4fd83c6eafe8348. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/IL1040600406.
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 0x7a8b7961c6b36254c8702b3afe28cf2f72f980d5b9ccb0ea3e12ae13b06402d1. 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/IL1041501603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b4450d6e2c6cc9eab7fe146918e927f79564f8152451209f87668937d118f8. 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/IL1041501604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0852cc3baaa7bdcbbd57231478eb161950c041fed56e116487beecb3c4942b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IL1041501605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566bdc421aa7738d12a56313974cea568c3efaf359914d01380f10cf5cb59205. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/IL1041501606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cd970d8a7ff12b8fed9fa722a324b4f1883f47b0ec28a6ccc43aa97a98da81. 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/IL1041501607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827777258db161f0b1b1ecbecce18a3c9215940ad09084b6d87221508cb537f2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:59:22Z), 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/IL1041501602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9b6a9e585d468aecc979bf1ab32dd3ceabd8b2b149e02800ccb46b9ab05611. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/IL1041501601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5212204ebdaed77d020c707edd4f5915390e9f6868e34a33904446e62308de80. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/IL1041501608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b30e715ace62f0d2e2abdc49e436b687df9c0fd6a1229b3e05056091f6a6e7b. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/IL1041501609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4233639063277d7794af1830a8fbc57f8bcd4609b23fae3fe626e0c829f70622. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/IL1041501610.