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 0xb26f8e9cd6708311aca2ddad5c300a30e5724c623bd04a101575a18a0efe6ad4. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3719822e-eef9-4861-916a-d9daa8dffc1b.json and https://artists.proofprofile.net/proofs/artist/3719822e-eef9-4861-916a-d9daa8dffc1b.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 0xb20e8e26d38afd67f253c976c7da20ec16abaa48b5c1d8f7461e7730d53668cc. 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/BKMLV2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa18236eff6612e9d3af421ed7459a207b492f5b18a6227868a29beafa7dbc4. 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/BKMLV2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac155847ab2aba1c82167a3f74d80972401d67e32d4d988788df10b6656aab0. 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/BKMLV2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f9632a0ad109b3f771ca97a2ef5ad9002a7d18122585472867955c39f0a4c5. 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/BKMLV2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20e8e26d38afd67f253c976c7da20ec16abaa48b5c1d8f7461e7730d53668cc. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BKMLV2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f9632a0ad109b3f771ca97a2ef5ad9002a7d18122585472867955c39f0a4c5. 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/BKMLV2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac155847ab2aba1c82167a3f74d80972401d67e32d4d988788df10b6656aab0. 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/BKMLV2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d32c7f6b8eec3c1b953032302f2c7b47590a146e87f6bea8b11aef27ff7f08. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BKMLV2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162c40fe00f88abef9806298539948923b3fe5f9304447170a69d62a4d87560c. 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/BKMLV2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe135c23fc7a05181c40fd0aa39b46032969bbff94279db9f1242770bc13e4fd6. 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/BKMLV2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf1eedaae1954959a915125d3cb0de4832ba787d65cd5de6a4373e44d4c7b47. 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/BKMLV2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac155847ab2aba1c82167a3f74d80972401d67e32d4d988788df10b6656aab0. 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/BKMLV2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa18236eff6612e9d3af421ed7459a207b492f5b18a6227868a29beafa7dbc4. 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/BKMLV2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28c550067f2ea5c2840dc307e7a7b672d0fd97f3f200b39d348458f534b026e. 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/BKMLV2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd292d9a9e937cd4655f513e5bbdae4614745d6d77c5232a59a8d82635765b37a. 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/BKMLV2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dba961d60e834950291674763d64196f2612a6beab040f02586d6fa3ffb772e. 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/BKMLV2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5123f957849b33472143f2e90ea2ea07d3a4ba954cc774fd2824d479f2aecd82. 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/BKMLV2400009.
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 0xe3018123cad8f4e8292012e19a69608914e08236b83cf8545420a2992c72afca. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/BKMLV2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c3eaa29c16eb934a33344298d26784a0ee04403ea8bb04462ce14ee5fce27c. 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/BKMLV2400013.